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  • glibc-2.36.9000
    Open master branch for glibc 2.37 development
    
  • glibc-2.36
    The GNU C Library version 2.36 is now available
    
    The GNU C Library
    =================
    
    The GNU C Library version 2.36 is now available.
    
    The GNU C Library is used as *the* C library in the GNU system and
    in GNU/Linux systems, as well as many other systems that use Linux
    as the kernel.
    
    The GNU C Library is primarily designed to be a portable
    and high performance C library.  It follows all relevant
    standards including ISO C11 and POSIX.1-2017.  It is also
    internationalized and has one of the most complete
    internationalization interfaces known.
    
    The GNU C Library webpage is at http://www.gnu.org/software/libc/
    
    Packages for the 2.36 release may be downloaded from:
            http://ftpmirror.gnu.org/libc/
            http://ftp.gnu.org/gnu/libc/
    
    The mirror list is at http://www.gnu.org/order/ftp.html
    
    NEWS for version 2.36
    =====================
    
    Major new features:
    
    * Support for DT_RELR relative relocation format has been added to
      glibc.  This is a new ELF dynamic tag that improves the size of
      relative relocations in shared object files and position independent
      executables (PIE).  DT_RELR generation requires linker support for
      -z pack-relative-relocs option, which is supported for some targets
      in recent binutils versions.  Lazy binding doesn't apply to DT_RELR.
    
    * On Linux, the pidfd_open, pidfd_getfd, and pidfd_send_signal functions
      have been added.  The pidfd functionality provides access to a process
      while avoiding the issue of PID reuse on tranditional Unix systems.
    
    * On Linux, the process_madvise function has been added. It has the
      same functionality as madvise but alters the target process identified
      by the pidfd.
    
    * On Linux, the process_mrelease function has been added.  It allows a
      caller to release the memory of a dying process.  The release of the
      memory is carried out in the context of the caller, using the caller's
      CPU affinity, and priority with CPU usage accounted to the caller.
    
    * The “no-aaaa” DNS stub resolver option has been added.  System
      administrators can use it to suppress AAAA queries made by the stub
      resolver, including AAAA lookups triggered by NSS-based interfaces
      such as getaddrinfo.  Only DNS lookups are affected: IPv6 data in
      /etc/hosts is still used, getaddrinfo with AI_PASSIVE will still
      produce IPv6 addresses, and configured IPv6 name servers are still
      used.  To produce correct Name Error (NXDOMAIN) results, AAAA queries
      are translated to A queries.  The new resolver option is intended
      primarily for diagnostic purposes, to rule out that AAAA DNS queries
      have adverse impact.  It is incompatible with EDNS0 usage and DNSSEC
      validation by applications.
    
    * On Linux, the fsopen, fsmount, move_mount, fsconfig, fspick, open_tree,
      and mount_setattr have been added.  They are part of the new Linux kernel
      mount APIs that allow applications to more flexibly configure and operate
      on filesystem mounts.  The new mount APIs are specifically designed to work
      with namespaces.
    
    * localedef now accepts locale definition files encoded in UTF-8.
      Previously, input bytes not within the ASCII range resulted in
      unpredictable output.
    
    * Support for the mbrtoc8 and c8rtomb multibyte/UTF-8 character conversion
      functions has been added per the ISO C2X N2653 and C++20 P0482R6 proposals.
      Support for the char8_t typedef has been added per the ISO C2X N2653
      proposal.  The functions are declared in uchar.h in C2X mode or when the
      _GNU_SOURCE macro or C++20 __cpp_char8_t feature test macro is defined.
      The char8_t typedef is declared in uchar.h in C2X mode or when the
      _GNU_SOURCE macro is defined and the C++20 __cpp_char8_t feature test macro
      is not defined (if __cpp_char8_t is defined, then char8_t is a builtin type).
    
    * The functions arc4random, arc4random_buf, and arc4random_uniform have been
      added.  The functions wrap getrandom and/or /dev/urandom to return high-
      quality randomness from the kernel.
    
    * Support for LoongArch running on Linux has been added.  This port requires
      as least binutils 2.38, GCC 12, and Linux 5.19.  Currently only hard-float
      ABI is supported:
    
        - loongarch64-linux-gnu
    
      The LoongArch ABI is 64-bit little-endian.
    
    Deprecated and removed features, and other changes affecting compatibility:
    
    * Support for prelink will be removed in the next release; this includes
      removal of the LD_TRACE_PRELINKING, and LD_USE_LOAD_BIAS, environment
      variables and their functionality in the dynamic loader.
    
    * The Linux kernel version check has been removed along with the
      LD_ASSUME_KERNEL environment variable.  The minimum kernel used to built
      glibc is still provided through NT_GNU_ABI_TAG ELF note and also printed
      when libc.so is issued directly.
    
    * On Linux, The LD_LIBRARY_VERSION environment variable has been removed.
    
    The following bugs are resolved with this release:
    
      [14932] dynamic-link: dlsym(handle, "foo") and dlsym(RTLD_NEXT, "foo")
        return different result with versioned "foo"
      [16355] libc: syslog.h's SYSLOG_NAMES namespace violation and utter
        mess
      [23293] dynamic-link: aarch64: getauxval is broken when run as ld.so
        ./exe and ld.so adjusts argv on the stack
      [24595] nptl: [2.28 Regression]: Deadlock in atfork handler which
        calls dlclose
      [25744] locale: mbrtowc with Big5-HKSCS returns 2 instead of 1 when
        consuming the second byte of certain double byte characters
      [25812] stdio: Libio vtable protection is sometimes only partially
        enforced
      [27054] libc: pthread_atfork handlers that call pthread_atfork
        deadlock
      [27924] dynamic-link: ld.so: Support DT_RELR relative relocation
        format
      [28128] build: declare_symbol_alias doesn't work for assembly codes
      [28566] network: getnameinfo with NI_NOFQDN is not thread safe
      [28752] nss: Segfault in getpwuid when stat fails
      [28815] libc: realpath should not copy to resolved buffer on error
      [28828] stdio: fputwc crashes
      [28838] libc: FAIL: elf/tst-p_align3
      [28845] locale: ld-monetary.c should be updated to match ISO C and
        other standards.
      [28850] libc: linux: __get_nprocs_sched reads uninitialized memory
        from the stack
      [28852] libc: getaddrinfo leaks memory with AI_ALL
      [28853] libc: tst-spawn6 changes current foreground process group
        (breaks test isolation)
      [28857] libc: FAIL: elf/tst-audit24a
      [28860] build: --enable-kernel=5.1.0 build fails because of missing
        __convert_scm_timestamps
      [28865] libc: linux: _SC_NPROCESSORS_CONF and _SC_NPROCESSORS_ONLN are
        inaccurate without /sys and /proc
      [28868] dynamic-link: Dynamic loader DFS algorithm segfaults on
        missing libraries
      [28880] libc: Program crashes if date beyone 2038
      [28883] libc: sysdeps/unix/sysv/linux/select.c: __select64
        !__ASSUME_TIME64_SYSCALLS && !__ASSUME_PSELECT fails on Microblaze
      [28896] string: strncmp-avx2-rtm and wcsncmp-avx2-rtm fallback on non-
        rtm variants when avoiding overflow
      [28922] build: The .d dependency files aren't always generated
      [28931] libc: hosts lookup broken for SUCCESS=CONTINUE and
        SUCCESS=MERGE
      [28936] build: nm: No such file
      [28950] localedata: Add locale for ISO code "tok" (Toki Pona)
      [28953] nss: NSS lookup result can be incorrect if function lookup
        clobbers errno
      [28970] math: benchtest: libmvec benchmark doesn't build with make
        bench.
      [28991] libc: sysconf(_SC_NPROCESSORS_CONF) should read
        /sys/devices/system/cpu/possible
      [28993] libc: closefrom() iterates until max int if no access to
        /proc/self/fd/
      [28996] libc: realpath fails to copy partial result to resolved buffer
        on ENOENT and EACCES
      [29027] math: [ia64] fabs fails with sNAN input
      [29029] nptl: poll() spuriously returns EINTR during thread
        cancellation and with cancellation disabled
      [29030] string: GLIBC 2.35 regression - Fortify crash on certain valid
        uses of mbsrtowcs (*** buffer overflow detected ***: terminated)
      [29062] dynamic-link: Memory leak in _dl_find_object_update if object
        is promoted to global scope
      [29069] libc: fstatat64_time64_statx wrapper broken on MIPS N32 with
        -D_FILE_OFFSET_BITS=64 and -D_TIME_BITS=64
      [29071] dynamic-link: m68k: Removal of ELF_DURING_STARTUP optimization
        broke ld.so
      [29097] time: fchmodat does not handle 64 bit time_t for
        AT_SYMLINK_NOFOLLOW
      [29109] libc: posix_spawn() always returns 1 (EPERM) on clone()
        failure
      [29141] libc: _FORTIFY_SOURCE=3 fail for gcc 12/glibc 2.35
      [29162] string: [PATCH] string.h syntactic error:
        include/bits/string_fortified.h:110: error: expected ',' or ';'
        before '__fortified_attr_access'
      [29165] libc: [Regression] broken argv adjustment
      [29187] dynamic-link: [regression] broken argv adjustment for nios2
      [29193] math: sincos produces a different output than sin/cos
      [29197] string: __strncpy_power9() uses uninitialised register vs18
        value for filling after \0
      [29203] libc: daemon is not y2038 aware
      [29204] libc: getusershell is not 2038 aware
      [29207] libc: posix_fallocate fallback implementation is not y2038
        aware
      [29208] libc: fpathconf(_PC_ASYNC_IO) is not y2038 aware
      [29209] libc: isfdtype is not y2038 aware
      [29210] network: ruserpass is not y2038 aware
      [29211] libc: __open_catalog is not y2038 aware
      [29213] libc: gconv_parseconfdir is not y2038 aware
      [29214] nptl: pthread_setcanceltype fails to set type
      [29225] network: Mistyped define statement in socket/sys/socket.h in
        line 184
      [29274] nptl: __read_chk is not a cancellation point
      [29279] libc: undefined reference to `mbstowcs_chk' after
        464d189b9622932a75302290625de84931656ec0
      [29304] libc: mq_timedreceive does not handle 64 bit syscall return
        correct for !__ASSUME_TIME64_SYSCALLS
      [29403] libc: st_atim, st_mtim, st_ctim stat struct members are
        missing on microblaze with largefile
    
    Release Notes
    =============
    
    https://sourceware.org/glibc/wiki/Release/2.36
    
    Contributors
    ============
    
    This release was made possible by the contributions of many people.
    The maintainers are grateful to everyone who has contributed
    changes or bug reports.  These include:
    
    =Joshua Kinard
    Adhemerval Zanella
    Adhemerval Zanella Netto
    Alan Modra
    Andreas Schwab
    Arjun Shankar
    Arnout Vandecappelle (Essensium/Mind)
    Carlos O'Donell
    Cristian Rodríguez
    DJ Delorie
    Danila Kutenin
    Darius Rad
    Dmitriy Fedchenko
    Dmitry V. Levin
    Emil Soleyman-Zomalan
    Fangrui Song
    Florian Weimer
    Gleb Fotengauer-Malinovskiy
    Guilherme Janczak
    H.J. Lu
    Ilyahoo Proshel
    Jason A. Donenfeld
    Joan Bruguera
    John David Anglin
    Jonathan Wakely
    Joseph Myers
    José Bollo
    Kito Cheng
    Maciej W. Rozycki
    Mark Wielaard
    Matheus Castanho
    Max Gautier
    Michael Hudson-Doyle
    Nicholas Guriev
    Noah Goldstein
    Paul E. Murphy
    Raghuveer Devulapalli
    Ricardo Bittencourt
    Sam James
    Samuel Thibault
    Sergei Trofimovich
    Siddhesh Poyarekar
    Stafford Horne
    Stefan Liebler
    Steve Grubb
    Su Lifan
    Sunil K Pandey
    Szabolcs Nagy
    Tejas Belagod
    Tom Coldrick
    Tom Honermann
    Tulio Magno Quites Machado Filho
    WANG Xuerui
    Wangyang Guo
    Wilco Dijkstra
    Xi Ruoyao
    Xiaoming Ni
    Yang Yanchao
    caiyinyu
    
    
  • glibc-2.35.9000
    Open master branch for glibc 2.36 development
    
  • glibc-2.35
    The GNU C Library version 2.35 is now available
    
    The GNU C Library
    =================
    
    The GNU C Library version 2.35 is now available.
    
    The GNU C Library is used as *the* C library in the GNU system and
    in GNU/Linux systems, as well as many other systems that use Linux
    as the kernel.
    
    The GNU C Library is primarily designed to be a portable
    and high performance C library.  It follows all relevant
    standards including ISO C11 and POSIX.1-2017.  It is also
    internationalized and has one of the most complete
    internationalization interfaces known.
    
    The GNU C Library webpage is at http://www.gnu.org/software/libc/
    
    Packages for the 2.35 release may be downloaded from:
            http://ftpmirror.gnu.org/libc/
            http://ftp.gnu.org/gnu/libc/
    
    The mirror list is at http://www.gnu.org/order/ftp.html
    
    NEWS for version 2.35
    =====================
    
    Major new features:
    
    * Unicode 14.0.0 Support: Character encoding, character type info, and
      transliteration tables are all updated to Unicode 14.0.0, using
      generator scripts contributed by Mike FABIAN (Red Hat).
    
    * Bump r_version in the debugger interface to 2 and add a new field,
      r_next, support multiple namespaces.
    
    * Support for the C.UTF-8 locale has been added to glibc.  The locale
      supports full code-point sorting for all valid Unicode code points.  A
      limitation in the framework for fnmatch, regexec, and regcomp requires
      a compromise to save space and only ASCII-based range expressions are
      supported for now (see bug 28255).  The full size of the locale is
      only ~400KiB, with 346KiB coming from LC_CTYPE information for
      Unicode.  This locale harmonizes downstream C.UTF-8 already shipping
      in various downstream distributions.  The locale is not built into
      glibc, and must be installed.
    
    * <math.h> functions that round their results to a narrower type, and
      corresponding <tgmath.h> macros, are added from TS 18661-1:2014, TS
      18661-3:2015 and draft ISO C2X:
    
      - fsqrt, fsqrtl, dsqrtl and corresponding fMsqrtfN, fMsqrtfNx,
        fMxsqrtfN and fMxsqrtfNx functions.
    
      - ffma, ffmal, dfmal and corresponding fMfmafN, fMfmafNx, fMxfmafN and
        fMxfmafNx functions.
    
    * <math.h> functions for floating-point maximum and minimum,
      corresponding to new operations in IEEE 754-2019, and corresponding
      <tgmath.h> macros, are added from draft ISO C2X: fmaximum,
      fmaximum_num, fmaximum_mag, fmaximum_mag_num, fminimum, fminimum_num,
      fminimum_mag, fminimum_mag_num and corresponding functions for float,
      long double, _FloatN and _FloatNx.
    
    * <math.h> macros for single-precision float constants are added as a
      GNU extension: M_Ef, M_LOG2Ef, M_LOG10Ef, M_LN2f, M_LN10f, M_PIf,
      M_PI_2f, M_PI_4f, M_1_PIf, M_2_PIf, M_2_SQRTPIf, M_SQRT2f and
      M_SQRT1_2f.
    
    * The __STDC_IEC_60559_BFP__ and __STDC_IEC_60559_COMPLEX__ macros are
      predefined as specified in TS 18661-1:2014.
    
    * The exp10 functions in <math.h> now have a corresponding type-generic
      macro in <tgmath.h>.
    
    * The ISO C2X macro _PRINTF_NAN_LEN_MAX has been added to <stdio.h>.
    
    * printf-family functions now support the %b format for output of
      integers in binary, as specified in draft ISO C2X, and the %B variant
      of that format recommended by draft ISO C2X.
    
    * A new DSO sorting algorithm has been added in the dynamic linker that uses
      topological sorting by depth-first search (DFS), solving performance issues
      of the existing sorting algorithm when encountering particular circular
      object dependency cases.
    
    * A new tunable, glibc.rtld.dynamic_sort, can be used to select between
      the two DSO sorting algorithms.  The default setting of '2' uses the
      new DFS-based algorithm.  The setting '1' switches to the old
      algorithm used in glibc 2.33 and earlier.
    
    * ABI support for a new function '__memcmpeq'. '__memcmpeq' is meant
      to be used by compilers for optimizing usage of 'memcmp' when its
      return value is only used for its boolean status.
    
    * Support for automatically registering threads with the Linux rseq
      system call has been added.  This system call is implemented starting
      from Linux 4.18.  The Restartable Sequences ABI accelerates user-space
      operations on per-cpu data.  It allows user-space to perform updates
      on per-cpu data without requiring heavy-weight atomic operations.
      Automatically registering threads allows all libraries, including
      libc, to make immediate use of the rseq support by using the
      documented ABI, via the __rseq_flags, __rseq_offset, and __rseq_size
      variables.  The GNU C Library manual has details on integration of
      Restartable Sequences.
    
    * A symbolic link to the dynamic linker is now installed under
      /usr/bin/ld.so (or more precisely, '${bindir}/ld.so').
    
    * All programs and the testsuite in glibc are now built as position independent
      executables (PIE) by default on toolchains and architectures that support it.
      Further, if the toolchain and architecture supports it, even static programs
      are built as PIE and the resultant glibc can be used to build static PIE
      executables.  A new option --disable-default-pie has been added to disable
      this behavior and get a non-PIE build.  This option replaces
      --enable-static-pie, which no longer has any effect on the build
      configuration.
    
    * On Linux, a new tunable, glibc.malloc.hugetlb, can be used to
      either make malloc issue madvise plus MADV_HUGEPAGE on mmap and sbrk
      or to use huge pages directly with mmap calls with the MAP_HUGETLB
      flags).  The former can improve performance when Transparent Huge Pages
      is set to 'madvise' mode while the latter uses the system reserved
      huge pages.
    
    * The printf family of functions now handles the flagged %#m conversion
      specifier, printing errno as an error constant (similar to strerrorname_np).
    
    * The function _dl_find_object has been added.  In-process unwinders
      can use it to efficiently locate unwinding information for a code
      address.
    
    * Support for OpenRISC running on Linux has been added.  This port requires
      as least binutils 2.35, GCC 11, and Linux 5.4.  Currently only soft-float
      ABI is supported:
    
        - or1k-linux-gnu
    
      The OpenRISC ABI is 32-bit big-endian and uses 64-bit time (y2038 safe) and
      64-bit file offsets (LFS default).
    
    * A new configure option, --with-rtld-early-cflags, can be used to
      specify additional compiler flags for building the early startup code
      of the dynamic linker.  On targets which have CPU compatibility
      checks, this can help to ensure that proper diagnostics are printed if
      the dynamic loader runs on an incompatible CPU.
    
    * On Linux, the epoll_pwait2 function has been added.  It is similar to
      epoll_wait with the difference the timeout has nanoseconds resolution.
    
    * The function posix_spawn_file_actions_addtcsetpgrp_np has been added,
      enabling posix_spawn and posix_spawnp to set the controlling terminal in
      the new process in a race free manner.  This function is a GNU extension.
    
    * Source fortification (_FORTIFY_SOURCE) level 3 is now available for
      applications compiling with glibc and gcc 12 and later. Level 3 leverages
      the __builtin_dynamic_object_size function to deliver additional
      fortification balanced against additional runtime cost (checking non-constant
      bounds).
    
    Deprecated and removed features, and other changes affecting compatibility:
    
    * On x86-64, the LD_PREFER_MAP_32BIT_EXEC environment variable support
      has been removed since the first PT_LOAD segment is no longer executable
      due to defaulting to -z separate-code.
    
    * The r_version update in the debugger interface makes the glibc binary
      incompatible with GDB binaries built without the following commits:
    
      c0154a4a21a gdb: Don't assume r_ldsomap when r_version > 1 on Linux
      4eb629d50d4 gdbserver: Check r_version < 1 for Linux debugger interface
    
      when audit modules or dlmopen are used.
    
    * Intel MPX support (lazy PLT, ld.so profile, and LD_AUDIT) has been removed.
    
    * The --enable-static-pie option is no longer available.  The glibc build
      configuration script now automatically detects static-pie support in the
      toolchain and architecture and enables it if available.
    
    * The catchsegv script and associated libSegFault.so shared object have
      been removed.  There are widely-deployed out-of-process alternatives for
      catching coredumps and backtraces.
    
    * Support for prelink will be removed in the next release; this includes
      removal of the LD_TRACE_PRELINKING, and LD_USE_LOAD_BIAS, environment
      variables and their functionality in the dynamic loader.
    
    Changes to build and runtime requirements:
    
    * The audit module interface version LAV_CURRENT is increased to enable
      proper bind-now support.  The loader now advertises via the la_symbind
      flags that PLT trace is not possible.  New audit modules require the
      new dynamic loader supporing the latest LAV_CURRENT version. Old audit
      modules are still loaded for all targets except aarch64.
    
    * The audit interface on aarch64 is extended to support both the indirect
      result location register (x8) and NEON Q register.  Old audit modules are
      rejected by the loader.  Audit modules must be rebuilt to use the newer
      structure sizes and the latest module interface version for LAV_CURRENT.
    
    Security related changes:
    
      CVE-2022-23219: Passing an overlong file name to the clnt_create
      legacy function could result in a stack-based buffer overflow when
      using the "unix" protocol.  Reported by Martin Sebor.
    
      CVE-2022-23218: Passing an overlong file name to the svcunix_create
      legacy function could result in a stack-based buffer overflow.
    
      CVE-2021-3998: Passing a path longer than PATH_MAX to the realpath
      function could result in a memory leak and potential access of
      uninitialized memory.  Reported by Qualys.
    
      CVE-2021-3999: Passing a buffer of size exactly 1 byte to the getcwd
      function may result in an off-by-one buffer underflow and overflow
      when the current working directory is longer than PATH_MAX and also
      corresponds to the / directory through an unprivileged mount
      namespace.  Reported by Qualys.
    
    The following bugs are resolved with this release:
    
      [12889] nptl: Race condition in pthread_kill
      [14232] nptl: tst-cancel7 and tst-cancelx7 race condition
      [14913] libc: [mips] Clean up MIPS 64-bit register-dump.h output
      [15310] dynamic-link: _dl_sort_fini is O(n^3) causing slow exit when
        many dsos
      [15333] libc: Use 64-bit stat functions in installed programs
      [15533] dynamic-link: LD_AUDIT introduces an avoidable performance
        degradation
      [15971] dynamic-link: No interface for debugger access to libraries
        loaded with dlmopen
      [17318] locale: [RFE] Provide a C.UTF-8 locale by default
      [17645] dynamic-link: RFE: Improve performance of dynamic loader for
        deeply nested DSO dependencies.
      [19193] nptl: pthread_kill, pthread_cancel return ESRCH for a thread
        ID whose lifetime has not ended
      [22542] network: buffer overflow in sunrpc clnt_create
        (CVE-2022-23219)
      [22716] malloc: [PATCH] mtrace.pl: use TRACE_PRELINKING instead of
        TRACE_LOADED_OBJECTS
      [25947] malloc: memory leak in muntrace
      [26045] math: fmaxf(inf, nan) does not always work
      [26108] math: exp10() has problems with <tgmath.h>
      [26779] build: benign use after realloc at localealias.c:329
      [27609] dynamic-link: [2.32/2.33/2.34 Regression] In elf/dl-open.c
        (_dl_open) we might use __LM_ID_CALLER to index GL(dl_ns)[]
      [27945] build: build-many-glibcs.py doesn't configure GCC with
        --enable-initfini-array
      [27991] build: x86: sysdeps/x86/configure.ac breaks when
        libc_cv_include_x86_isa_level is loaded from cache
      [28036] nptl: Incorrect types for pthread_mutexattr_set/getrobust_np
        in __REDIRECT_NTH macro
      [28061] dynamic-link: A failing dlmopen called by an auditor crashed
      [28062] dynamic-link: Suppress audit calls when a (new) namespace is
        empty
      [28126] libc: nftw aborts for paths longer than PATH_MAX
      [28129] dynamic-link: Unnecessary check DT_DEBUG in ld.so
      [28153] libc: [test] gmon/tst-gmon-gprof* may have a f3 line when
        built with ld.lld
      [28182] libc: _TIME_BITS=64 in C++ has issues with fcntl, ioctl, prctl
      [28185] math: Inaccurate j0f function (again)
      [28199] locale: iconvconfig prefix flag behaves differently in glibc
        2.34
      [28203] dynamic-link: aarch64: elf_machine_{load_address,dynamic}
        should drop _GLOBAL_OFFSET_TABLE_[0] in favor of __ehdr_start for
        robustness
      [28213] librt: NULL pointer dereference in mq_notify (CVE-2021-38604)
      [28223] libc: mips: clone does not align stack
      [28253] dynamic-link: Missing colon in LD_SHOW_AUXV output after
        AT_MINSIGSTKSZ
      [28256] malloc: Conditional jump or move depends on uninitialised
        value(s) in __GI___tunables_init
      [28260] build: io/tst-closefrom, misc/tst-close_range, posix/tst-
        spawn5 fail if stray fds are open
      [28310] libc: Do not use affinity mask for sysconf
        (_SC_NPROCESSORS_CONF)
      [28338] time: undefined behavior in __tzfile_compute with oddball TZif
        file
      [28340] dynamic-link: ld.so crashes while loading a DSO with a read-
        only dynamic section
      [28349] libc: Segfault for ping -R on qemux86 caused by recvmsg()
      [28350] libc: ping receives SIGABRT on lib32-qemux86-64 caused by
        recvmsg()
      [28353] network: Race condition on __opensock
      [28357] dynamic-link: deadlock between pthread_create and ctors
      [28358] math: f64xdivf128 and f64xmulf128 spurious underflows
      [28361] nptl: Fix for bug 12889 causes setxid deadlock
      [28368] build: -Waddress instances in stdio-common/vfprintf-internal.c
      [28390] localedata: Update locale data to Unicode 14.0.0
      [28397] math: tgmath.h should not define fmaxmag, fminmag macros for
        C2X
      [28400] libc: [2.35 Regression] string/test-strncasecmp: cannot set
        locale "en_US.UTF-8"
      [28407] nptl: pthread_kill assumes that kill (getpid ()) is equivalent
        to tgkill (getpid (), gettid())
      [28455] dynamic-link: -Wl,--enable-new-dtags doesn't work
      [28457] dynamic-link: Missing reldepmod4.so dependency for
        globalmod1.so
      [28469] time: linux: struct timex is not correctly set for 32-bit
        systems with TIMESIZE=64
      [28470] regex: Buffer read overrun in regular expression searching
      [28475] string: Incorrect access attribute on memfrob
      [28524] libc: Conversion from ISO-2022-JP-3 with iconv may emit
        spurious NUL character on state reset
      [28532] libc: powerpc64[le]: CFI for assembly templated syscalls is
        incorrect
      [28550] dynamic-link: FAIL: tst-dso-
        ordering9_112-ecbda(GLIBC_TUNABLES=glibc.rtld.dynamic_sort=1)
        execution test
      [28554] build: Undefined generate-md5
      [28572] libc: Misaligned accesses in test-memcpy and test-mempcpy on
        hppa
      [28607] nptl: Masked signals are delivered on thread exit
      [28624] libc: openjdk 8/9 assume uni processor and gets stuck due to
        lack of cpu counting /proc fallback with glibc 2.34
      [28646] string: [2.35 Regression] mock -r fedora-36-x86_64
        /tmp/java-1.8.0-openjdk-1.8.0.312.b07-2.fc36.src.rpm& fails to build
      [28648] dynamic-link: Running ld.so on statically linked binaries
        crashes
      [28656] dynamic-link: LD_PREFER_MAP_32BIT_EXEC no longer works due to
        binutils changes
      [28676] dynamic-link: p_align on PT_LOAD segment in DSO isn't honored
      [28678] nptl: nptl/tst-create1 hangs sporadically
      [28688] dynamic-link: PT_LOAD p_align check is too strict
      [28700] nss: "dns [!UNAVAIL=return] files" default for hosts database
        is not useful
      [28707] time: assert in tzfile.c __tzfile_read striking with truncated
        timezones generated by tzcode-2021d and later
      [28713] math: GCC 12 miscompiles libm
      [28732] dynamic-link: FAIL: elf/tst-dl_find_object
      [28738] build: LIBC_LINKER_FEATURE doesn't work on linker -z option
      [28745] dynamic-link: _dl_find_object miscompilation on powerpc64le
      [28746] libc: _FORTIFY_SOURCE does not work for stpcpy
      [28749] libc: Inconsistency detected by ld.so: rtld.c: 1632: dl_main:
        Assertion `GL(dl_rtld_map).l_libname' failed!
      [28755] string: overflow bug in wcsncmp_avx2 and wcsncmp_evex
      [28757] nptl: GDB printer tests failed with new GDB
      [28765] math: x86_64 libmvec atan2 accuracy
      [28766] manual: Document libmvec accuracy
      [28768] network: Buffer overflow in svcunix_create with long pathnames
        (CVE-2022-23218)
      [28769] libc: Off-by-one buffer overflow/underflow in getcwd()
        (CVE-2021-3999)
      [28770] libc: Unexpected return value from realpath() for too long
        results (CVE-2021-3998)
      [28771] libc: %ebx optimization macros are incompatible with .altmacro
        in Systemtap probes
      [28780] build: --disable-default-pie doesn't work on static programs
      [28782] libc: x86-64 ISA level for glibc itself is always
        x86-64-baseline
      [28792] glob: possible wrong behaviour with patterns with double [
        with no closing ]
      [28837] libc: FAIL: socket/tst-socket-timestamp-compat
      [28847] locale: Empty mon_decimal_point in LC_MONETARY results in non-
        empty mon_decimal_point_wc
    
    Release Notes
    =============
    
    https://sourceware.org/glibc/wiki/Release/2.35
    
    Contributors
    ============
    
    This release was made possible by the contributions of many people.
    The maintainers are grateful to everyone who has contributed
    changes or bug reports.  These include:
    
    Adhemerval Zanella
    Akila Welihinda
    Alexandra Hájková
    Andrea Monaco
    Andreas Schwab
    Anton Blanchard
    Arjun Shankar
    Aurelien Jarno
    Ben Woodard
    Carlos O'Donell
    Chung-Lin Tang
    Cristian Rodríguez
    DJ Delorie
    Fangrui Song
    Florian Weimer
    H.J. Lu
    Hans-Peter Nilsson
    Jangwoong Kim
    Jiaxun Yang
    John David Anglin
    Jonathan Wakely
    Joseph Myers
    Khem Raj
    Kurt Kanzenbach
    Luca Boccassi
    Mark Wielaard
    Martin Sebor
    Matheus Castanho
    Matt Whitlock
    Maxim Kuvyrkov
    Michael Kerrisk
    Mike FABIAN
    Naohiro Tamura
    Naohiro Tamura via Libc-alpha
    Nart Tlisha
    Nikita Popov
    Noah Goldstein
    Patrick McGehearty
    Paul A. Clarke
    Paul E. Murphy
    Paul Eggert
    Paul Zimmermann
    Robbie Harwood
    Romain GEISSLER
    Rongwei Wang
    Samuel Thibault
    Sergey Bugaev
    Siddhesh Poyarekar
    Stafford Horne
    Stefan Liebler
    Sunil K Pandey
    Szabolcs Nagy
    Thomas Petazzoni
    Tulio Magno Quites Machado Filho
    Wilco Dijkstra
    Xi Ruoyao
    maminjie
    
    
  • glibc-2.34.9000
    Open master branch for glibc 2.35 development
    
  • glibc-2.34
    The GNU C Library version 2.34 is now available
    
    The GNU C Library
    =================
    
    The GNU C Library version 2.34 is now available.
    
    The GNU C Library is used as *the* C library in the GNU system and
    in GNU/Linux systems, as well as many other systems that use Linux
    as the kernel.
    
    The GNU C Library is primarily designed to be a portable
    and high performance C library.  It follows all relevant
    standards including ISO C11 and POSIX.1-2017.  It is also
    internationalized and has one of the most complete
    internationalization interfaces known.
    
    The GNU C Library webpage is at http://www.gnu.org/software/libc/
    
    Packages for the X.Y release may be downloaded from:
            http://ftpmirror.gnu.org/libc/
            http://ftp.gnu.org/gnu/libc/
    
    The mirror list is at http://www.gnu.org/order/ftp.html
    
    NEWS for version 2.34
    =====================
    
    Major new features:
    
    * In order to support smoother in-place-upgrades and to simplify
      the implementation of the runtime all functionality formerly
      implemented in the libraries libpthread, libdl, libutil, libanl has
      been integrated into libc.  New applications do not need to link with
      -lpthread, -ldl, -lutil, -lanl anymore.  For backwards compatibility,
      empty static archives libpthread.a, libdl.a, libutil.a, libanl.a are
      provided, so that the linker options keep working.  Applications which
      have been linked against glibc 2.33 or earlier continue to load the
      corresponding shared objects (which are now empty).  The integration
      of those libraries into libc means that additional symbols become
      available by default.  This can cause applications that contain weak
      references to take unexpected code paths that would only have been
      used in previous glibc versions when e.g. preloading libpthread.so.0,
      potentially exposing application bugs.
    
    * When _DYNAMIC_STACK_SIZE_SOURCE or _GNU_SOURCE are defined,
      PTHREAD_STACK_MIN is no longer constant and is redefined to
      sysconf(_SC_THREAD_STACK_MIN).  This supports dynamic sized register
      sets for modern architectural features like Arm SVE.
    
    * Add _SC_MINSIGSTKSZ and _SC_SIGSTKSZ.  When _DYNAMIC_STACK_SIZE_SOURCE
      or _GNU_SOURCE are defined, MINSIGSTKSZ and SIGSTKSZ are no longer
      constant on Linux.  MINSIGSTKSZ is redefined to sysconf(_SC_MINSIGSTKSZ)
      and SIGSTKSZ is redefined to sysconf (_SC_SIGSTKSZ).  This supports
      dynamic sized register sets for modern architectural features like
      Arm SVE.
    
    * The dynamic linker implements the --list-diagnostics option, printing
      a dump of information related to IFUNC resolver operation and
      glibc-hwcaps subdirectory selection.
    
    * On Linux, the function execveat has been added.  It operates similar to
      execve and it is is already used to implement fexecve without requiring
      /proc to be mounted.  However, different than fexecve, if the syscall is not
      supported by the kernel an error is returned instead of trying a fallback.
    
    * The ISO C2X function timespec_getres has been added.
    
    * The feature test macro __STDC_WANT_IEC_60559_EXT__, from draft ISO
      C2X, is supported to enable declarations of functions defined in Annex F
      of C2X.  Those declarations are also enabled when
      __STDC_WANT_IEC_60559_BFP_EXT__, as specified in TS 18661-1, is
      defined, and when _GNU_SOURCE is defined.
    
    * On powerpc64*, glibc can now be compiled without scv support using the
      --disable-scv configure option.
    
    * Add support for 64-bit time_t on configurations like x86 where time_t
      is traditionally 32-bit.  Although time_t still defaults to 32-bit on
      these configurations, this default may change in future versions.
      This is enabled with the _TIME_BITS preprocessor macro set to 64 and is
      only supported when LFS (_FILE_OFFSET_BITS=64) is also enabled.  It is
      only enabled for Linux and the full support requires a minimum kernel
      version of 5.1.
    
    * The main gconv-modules file in glibc now contains only a small set of
      essential converter modules and the rest have been moved into a supplementary
      configuration file gconv-modules-extra.conf in the gconv-modules.d directory
      in the same GCONV_PATH.  Similarly, external converter modules directories
      may have supplementary configuration files in a gconv-modules.d directory
      with names ending with .conf to logically classify the converter modules in
      that directory.
    
    * On Linux, a new tunable, glibc.pthread.stack_cache_size, can be used
      to configure the size of the thread stack cache.
    
    * The function _Fork has been added as an async-signal-safe fork replacement
      since Austin Group issue 62 droped the async-signal-safe requirement for
      fork (and it will be included in the future POSIX standard).  The new _Fork
      function does not run any atfork function neither resets any internal state
      or lock (such as the malloc one), and only sets up a minimal state required
      to call async-signal-safe functions (such as raise or execve).  This function
      is currently a GNU extension.
    
    * On Linux, the close_range function has been added.  It allows efficiently
      closing a range of file descriptors on recent kernels (version 5.9).
    
    * The function closefrom has been added.  It closes all file descriptors
      greater than or equal to a given integer.  This function is a GNU extension,
      although it is also present in other systems.
    
    * The posix_spawn_file_actions_addclosefrom_np function has been added,
      enabling posix_spawn and posix_spawnp to close all file descriptors greater
      than or equal to a given integer.  This function is a GNU extension,
      although Solaris also provides a similar function.
    
    Deprecated and removed features, and other changes affecting compatibility:
    
    * The function pthread_mutex_consistent_np has been deprecated; programs
      should use the equivalent standard function pthread_mutex_consistent
      instead.
    
    * The function pthread_mutexattr_getrobust_np has been deprecated;
      programs should use the equivalent standard function
      pthread_mutexattr_getrobust instead.
    
    * The function pthread_mutexattr_setrobust_np has been deprecated;
      programs should use the equivalent standard function
      pthread_mutexattr_setrobust instead.
    
    * The function pthread_yield has been deprecated; programs should use
      the equivalent standard function sched_yield instead.
    
    * The function inet_neta declared in <arpa/inet.h> has been deprecated.
    
    * Various rarely-used functions declared in <resolv.h> and
      <arpa/nameser.h> have been deprecated.  Applications are encouraged to
      use dedicated DNS processing libraries if applicable.  For <resolv.h>,
      this affects the functions dn_count_labels, fp_nquery, fp_query,
      fp_resstat, hostalias, loc_aton, loc_ntoa, p_cdname, p_cdnname,
      p_class, p_fqname, p_fqnname, p_option, p_query, p_rcode, p_time,
      p_type, putlong, putshort, res_hostalias, res_isourserver,
      res_nameinquery, res_queriesmatch, res_randomid, sym_ntop, sym_ntos,
      sym_ston.  For <arpa/nameser.h>, the functions ns_datetosecs,
      ns_format_ttl, ns_makecanon, ns_parse_ttl, ns_samedomain, ns_samename,
      ns_sprintrr, ns_sprintrrf, ns_subdomain have been deprecated.
    
    * Various symbols previously defined in libresolv have been moved to libc
      in order to prepare for libresolv moving entirely into libc (see earlier
      entry for merging libraries into libc).  The symbols __dn_comp,
      __dn_expand, __dn_skipname, __res_dnok, __res_hnok, __res_mailok,
      __res_mkquery, __res_nmkquery, __res_nquery, __res_nquerydomain,
      __res_nsearch, __res_nsend, __res_ownok, __res_query, __res_querydomain,
      __res_search, __res_send formerly in libresolv have been renamed and no
      longer have a __ prefix.  They are now available in libc.
    
    * The pthread cancellation handler is now installed with SA_RESTART and
      pthread_cancel will always send the internal SIGCANCEL on a cancellation
      request.  It should not be visible to applications since the cancellation
      handler should either act upon cancellation (if asynchronous cancellation
      is enabled) or ignore the cancellation internal signal.  However there are
      buggy kernel interfaces (for instance some CIFS versions) that could still
      see a spurious EINTR error when cancellation interrupts a blocking syscall.
    
    * Previously, glibc installed its various shared objects under versioned
      file names such as libc-2.33.so.  The ABI sonames (e.g., libc.so.6)
      were provided as symbolic links.  Starting with glibc 2.34, the shared
      objects are installed under their ABI sonames directly, without
      symbolic links.  This increases compatibility with distribution
      package managers that delete removed files late during the package
      upgrade or downgrade process.
    
    * The symbols mallwatch and tr_break are now deprecated and no longer used in
      mtrace.  Similar functionality can be achieved by using conditional
      breakpoints within mtrace functions from within gdb.
    
    * The __morecore and __after_morecore_hook malloc hooks and the default
      implementation __default_morecore have been removed from the API.  Existing
      applications will continue to link against these symbols but the interfaces
      no longer have any effect on malloc.
    
    * Debugging features in malloc such as the MALLOC_CHECK_ environment variable
      (or the glibc.malloc.check tunable), mtrace() and mcheck() have now been
      disabled by default in the main C library.  Users looking to use these
      features now need to preload a new debugging DSO libc_malloc_debug.so to get
      this functionality back.
    
    * The deprecated functions malloc_get_state and malloc_set_state have been
      moved from the core C library into libc_malloc_debug.so.  Legacy applications
      that still use these functions will now need to preload libc_malloc_debug.so
      in their environment using the LD_PRELOAD environment variable.
    
    * The deprecated memory allocation hooks __malloc_hook, __realloc_hook,
      __memalign_hook and __free_hook are now removed from the API.  Compatibility
      symbols are present to support legacy programs but new applications can no
      longer link to these symbols.  These hooks no longer have any effect on glibc
      functionality.  The malloc debugging DSO libc_malloc_debug.so currently
      supports hooks and can be preloaded to get this functionality back for older
      programs.  However this is a transitional measure and may be removed in a
      future release of the GNU C Library.  Users may port away from these hooks by
      writing and preloading their own malloc interposition library.
    
    Changes to build and runtime requirements:
    
    * On Linux, the shm_open, sem_open, and related functions now expect the
      file shared memory file system to be mounted at /dev/shm.  These functions
      no longer search among the system's mount points for a suitable
      replacement if /dev/shm is not available.
    
    Security related changes:
    
      CVE-2021-27645: The nameserver caching daemon (nscd), when processing
      a request for netgroup lookup, may crash due to a double-free,
      potentially resulting in degraded service or Denial of Service on the
      local system.  Reported by Chris Schanzle.
    
      CVE-2021-33574: The mq_notify function has a potential use-after-free
      issue when using a notification type of SIGEV_THREAD and a thread
      attribute with a non-default affinity mask.
    
      CVE-2021-35942: The wordexp function may overflow the positional
      parameter number when processing the expansion resulting in a crash.
      Reported by Philippe Antoine.
    
    The following bugs are resolved with this release:
    
      [4737] libc: fork is not async-signal-safe
      [5781] math: Slow dbl-64 sin/cos/sincos for special values
      [10353] libc: Methods for deleting all file descriptors greater than
        given integer (closefrom)
      [14185] glob: fnmatch() fails when '*' wildcard is applied on the file
        name containing multi-byte character(s)
      [14469] math: Inaccurate j0f function
      [14470] math: Inaccurate j1f function
      [14471] math: Inaccurate y0f function
      [14472] math: Inaccurate y1f function
      [14744] nptl: kill -32 $pid or kill -33 $pid on a process cancels a
        random thread
      [15271] dynamic-link: dlmopen()ed shared library with LM_ID_NEWLM
        crashes if it fails dlsym() twice
      [15648] nptl: multiple definition of `__lll_lock_wait_private'
      [16063] nptl: Provide a pthread_once variant in libc directly
      [17144] libc: syslog is not thread-safe if NO_SIGPIPE is not defined
      [17145] libc: syslog with LOG_CONS leaks console file descriptor
      [17183] manual: description of ENTRY struct in <search.h> in glibc
        manual is incorrect
      [18435] nptl: pthread_once hangs when init routine throws an exception
      [18524] nptl: Missing calloc error checking in
        __cxa_thread_atexit_impl
      [19329] dynamic-link: dl-tls.c assert failure at concurrent
        pthread_create and dlopen
      [19366] nptl: returning from a thread should disable cancellation
      [19511] nptl: 8MB memory leak in pthread_create in case of failure
        when non-root user changes priority
      [20802] dynamic-link: getauxval NULL pointer dereference after static
        dlopen
      [20813] nptl: pthread_exit is inconsistent between libc and libpthread
      [22057] malloc: malloc_usable_size is broken with mcheck
      [22668] locale: LC_COLLATE: the last character of ellipsis is not
        ordered correctly
      [23323] libc: [RFE] CSU startup hardening.
      [23328] malloc: Remove malloc hooks and ensure related APIs return no
        data.
      [23462] dynamic-link: Static binary with dynamic string tokens ($LIB,
        $PLATFORM, $ORIGIN) crashes
      [23489] libc: "gcc -lmcheck" aborts on free when using posix_memalign
      [23554] nptl: pthread_getattr_np reports wrong stack size with
        MULTI_PAGE_ALIASING
      [24106] libc: Bash interpreter in ldd script is taken from host
      [24773] dynamic-link: dlerror in an secondary namespace does not use
        the right free implementation
      [25036] localedata: Update collation order for Swedish
      [25383] libc: where_is_shmfs/__shm_directory/SHM_GET_NAME may cause
        shm_open to pick wrong directory
      [25680] dynamic-link: ifuncmain9picstatic and ifuncmain9picstatic
        crash in IFUNC resolver due to stack canary (--enable-stack-
        protector=all)
      [26874] build: -Warray-bounds in _IO_wdefault_doallocate
      [26983] math: [x86_64] x86_64 tgamma has too large ULP error
      [27111] dynamic-link: pthread_create and tls access use link_map
        objects that may be concurrently freed by dlclose
      [27132] malloc: memusagestat is linked to system librt, leading to
        undefined symbols on major version upgrade
      [27136] dynamic-link: dtv setup at thread creation may leave an entry
        uninitialized
      [27249] libc: libSegFault.so does not output signal number properly
      [27304] nptl: pthread_cond_destroy does not pass private flag to futex
        system calls
      [27318] dynamic-link: glibc fails to load binaries when built with
        -march=sandybridge:  CPU ISA level is lower than required
      [27343] nss: initgroups() SIGSEGVs when called on a system without
        nsswich.conf (in a chroot)
      [27346] dynamic-link: x86: PTWRITE feature check is missing
      [27389] network: NSS chroot hardening causes regressions in chroot
        deployments
      [27403] dynamic-link: aarch64: tlsdesc htab is not freed on dlclose
      [27444] libc: sysconf reports unsupported option (-1) for
        _SC_LEVEL1_ICACHE_LINESIZE on X86 since v2.33
      [27462] nscd: double-free in nscd (CVE-2021-27645)
      [27468] malloc: aarch64: realloc crash with heap tagging: FAIL:
        malloc/tst-malloc-thread-fail
      [27498] dynamic-link: __dl_iterate_phdr lacks unwinding information
      [27511] libc: S390 memmove assumes Vector Facility when MIE Facility 3
        is present
      [27522] glob: glob, glob64 incorrectly marked as __THROW
      [27555] dynamic-link: Static tests fail with --enable-stack-
        protector=all
      [27559] libc: fstat(AT_FDCWD) succeeds (it shouldn't) and returns
        information for the current directory
      [27577] dynamic-link: elf/ld.so --help doesn't work
      [27605] libc: tunables can't control xsave/xsavec selection in
        dl_runtime_resolve_*
      [27623] libc: powerpc: Missing registers in sc[v] clobbers list
      [27645] libc: [linux] sysconf(_SC_NPROCESSOR...) breaks down on
        containers
      [27646] dynamic-link: Linker error for non-existing NSS symbols (e.g.
        _nss_files_getcanonname_r) from within a dlmopen namespace.
      [27648] libc: FAIL: misc/tst-select
      [27650] stdio: vfscanf returns too early if a match is longer than
        INT_MAX
      [27651] libc: Performance regression after updating to 2.33
      [27655] string: Wrong size calculation in string/test-strnlen.c
      [27706] libc: select fails to update timeout on error
      [27709] libc: arm: FAIL: debug/tst-longjmp_chk2
      [27721] dynamic-link: x86: ld_audit ignores bind now for TLSDESC and
        tries resolving them lazily
      [27744] nptl: Support different libpthread/ld.so load orders in
        libthread_db
      [27749] libc: Data race __run_exit_handlers
      [27761] libc: getconf: Segmentation fault when passing '-vq' as
        argument
      [27832] nss: makedb.c:797:7: error: 'writev' specified size 4294967295
        exceeds maximum object size 2147483647
      [27870] malloc: MALLOC_CHECK_ causes realloc(valid_ptr, TOO_LARGE) to
        not set ENOMEM
      [27872] build: Obsolete configure option --enable-stackguard-
        randomization
      [27873] build: tst-cpu-features-cpuinfo fail when building on AMD cpu
      [27882] localedata: Use U+00AF MACRON in more EBCDIC charsets
      [27892] libc: powerpc: scv ABI error handling fails to check
        IS_ERR_VALUE
      [27896] nptl: mq_notify does not handle separately allocated thread
        attributes (CVE-2021-33574)
      [27901] libc: TEST_STACK_ALIGN doesn't work
      [27902] libc: The x86-64 clone wrapper fails to align child stack
      [27914] nptl: Install SIGSETXID handler with SA_ONSTACK
      [27939] libc: aarch64: clone does not align the stack
      [27968] libc: s390x: clone does not align the stack
      [28011] libc: Wild read in wordexp (parse_param) (CVE-2021-35942)
      [28024] string: s390(31bit): Wrong result of memchr (MEMCHR_Z900_G5)
        with n >= 0x80000000
      [28028] malloc: malloc: tcache shutdown sequence does not work if the
        thread never allocated anything
      [28033] libc: Need to check RTM_ALWAYS_ABORT for RTM
      [28064] string: x86_64:wcslen implementation list has wcsnlen
      [28067] libc: FAIL: posix/tst-spawn5
      [28068] malloc: FAIL: malloc/tst-mallocalign1-mcheck
      [28071] time: clock_gettime, gettimeofday, time lost vDSO acceleration
        on older kernels
      [28075] nis: Out-of-bounds static buffer read in nis_local_domain
      [28089] build: tst-tls20 fails when linker defaults to --as-needed
      [28090] build: elf/tst-cpu-features-cpuinfo-static fails on certain
        AMD64 cpus
      [28091] network: ns_name_skip may return 0 for domain names without
        terminator
    
    Release Notes
    =============
    
    https://sourceware.org/glibc/wiki/Release/2.34
    
    Contributors
    ============
    
    This release was made possible by the contributions of many people.
    The maintainers are grateful to everyone who has contributed
    changes or bug reports.  These include:
    
    Adhemerval Zanella
    Alejandro Colomar \(man-pages\)
    Alexandra Hájková
    Alice Xu
    Alyssa Ross
    Andreas Roeseler
    Andreas Schwab
    Anton Blanchard
    Arjun Shankar
    Armin Brauns
    Bruno Haible
    Carlos O'Donell
    Cooper Qu
    DJ Delorie
    Dan Raymond
    Darius Rad
    David Hughes
    Fangrui Song
    Florian Weimer
    H.J. Lu
    Hanataka Shinya
    Hugo Gabriel Eyherabide
    Jakub Jelinek
    JeffyChen
    John David Anglin
    Joseph Myers
    Khem Raj
    Lirong Yuan
    Lucas A. M. Magalhaes
    Lukasz Majewski
    Maninder Singh
    Mark Harris
    Martin Sebor
    Matheus Castanho
    Michal Nazarewicz
    Mike Hommey
    Naohiro Tamura
    Nicholas Piggin
    Noah Goldstein
    Paul Eggert
    Paul Zimmermann
    Pedro Franco de Carvalho
    Raoni Fassina Firmino
    Raphael Moreira Zinsly
    Romain GEISSLER
    Sajan Karumanchi
    Samuel Thibault
    Sebastian Rasmussen
    Sergei Trofimovich
    Shen-Ta Hsieh
    Siddhesh Poyarekar
    Stafford Horne
    Stefan Liebler
    Sunil K Pandey
    Szabolcs Nagy
    Tulio Magno Quites Machado Filho
    Vineet Gupta
    Vitaly Buka
    Vitaly Chikunov
    Wilco Dijkstra
    Xeonacid
    Xiaoming Ni
    Yang Xu
    liuhongt
    noah
    Érico Nogueira
    
    
  • glibc-2.33.9000
    Open master branch for glibc 2.34 development
  • glibc-2.33
    The GNU C Library
    =================
    
    The GNU C Library version 2.33 is now available.
    
    The GNU C Library is used as *the* C library in the GNU system and
    in GNU/Linux systems, as well as many other systems that use Linux
    as the kernel.
    
    The GNU C Library is primarily designed to be a portable
    and high performance C library.  It follows all relevant
    standards including ISO C11 and POSIX.1-2017.  It is also
    internationalized and has one of the most complete
    internationalization interfaces known.
    
    The GNU C Library webpage is at http://www.gnu.org/software/libc/
    
    Packages for the 2.32 release may be downloaded from:
            http://ftpmirror.gnu.org/libc/
            http://ftp.gnu.org/gnu/libc/
    
    The mirror list is at http://www.gnu.org/order/ftp.html
    
    NEWS for version 2.33
    =====================
    
    Major new features:
    
    * The dynamic linker accepts the --list-tunables argument which prints
      all the supported tunables.  This option is disable if glibc is
      configured with tunables disabled (--enable-tunables=no).
    
    * The dynamic linker accepts the --argv0 argument and provides opportunity
      to change argv[0] string.
    
    * The dynamic linker loads optimized implementations of shared objects
      from subdirectories under the glibc-hwcaps directory on the library
      search path if the system's capabilities meet the requirements for
      that subdirectory.  Initially supported subdirectories include
      "power9" and "power10" for the powerpc64le-linux-gnu architecture,
      "z13", "z14", "z15" for s390x-linux-gnu, and "x86-64-v2", "x86-64-v3",
      "x86-64-v4" for x86_64-linux-gnu.  In the x86_64-linux-gnu case, the
      subdirectory names correspond to the vendor-independent x86-64
      microarchitecture levels defined in the x86-64 psABI supplement.
    
    * The new --help option of the dynamic linker provides usage and
      information and library search path diagnostics.
    
    * The mallinfo2 function is added to report statistics as per mallinfo,
      but with larger field widths to accurately report values that are
      larger than fit in an integer.
    
    * Add <sys/platform/x86.h> to provide query macros for x86 CPU features.
    
    * Support for the RISC-V ISA running on Linux has been expanded to run on
      32-bit hardware.  This is supported for the following ISA and ABI pairs:
    
        - rv32imac ilp32
        - rv32imafdc ilp32
        - rv32imafdc ilp32d
    
      The 32-bit RISC-V port requires at least Linux 5.4, GCC 7.1 and binutils
      2.28.
    
    * A new fortification level _FORTIFY_SOURCE=3 is available.  At this level,
      glibc may use additional checks that may have an additional performance
      overhead.  At present these checks are available only on LLVM 9 and later.
      The latest GCC available at this time (10.2) does not support this level of
      fortification.
    
    Deprecated and removed features, and other changes affecting compatibility:
    
    * The mallinfo function is marked deprecated.  Callers should call
      mallinfo2 instead.
    
    * When dlopen is used in statically linked programs, alternative library
      implementations from HWCAP subdirectories are no longer loaded.
      Instead, the default implementation is used.
    
    * The deprecated <sys/vtimes.h> header and the function vtimes have been
      removed.  To support old binaries, the vtimes function continues to exist
      as a compatibility symbol.  Applications should use the getrlimit or
      prlimit.
    
    * Following a change in the tzdata 2018a release upstream, the zdump
      program is now installed in the /usr/bin subdirectory.  Previously,
      the /usr/sbin subdirectory was used.
    
    * On s390(x), the type float_t is now derived from the macro
      __FLT_EVAL_METHOD__ that is defined by the compiler, instead of being
      hardcoded to double.  This does not affect the ABI of any libraries
      that are part of the GNU C Library, but may affect the ABI of other
      libraries that use this type in their interfaces.  The new definition
      improves consistency with compiler behavior in many scenarios.
    
    * A future version of glibc will stop loading shared objects from the
      "tls" subdirectories on the library search path, the subdirectory that
      corresponds to the AT_PLATFORM system name, and also stop employing
      the legacy AT_HWCAP search mechanism.  Applications should switch to
      the new glibc-hwcaps mechanism instead; if they do not do that, only
      the baseline version (directly from the search path directory) will be
      loaded.
    
    Changes to build and runtime requirements:
    
    * On Linux, the system administrator needs to configure /dev/pts with
      the intended access modes for pseudo-terminals.  glibc no longer
      attemps to adjust permissions of terminal devices.  The previous glibc
      defaults ("tty" group, user read/write and group write) already
      corresponded to what most systems used, so that grantpt did not
      perform any adjustments.
    
    * On Linux, the posix_openpt and getpt functions no longer attempt to
      use legacy (BSD) pseudo-terminals and assume that if /dev/ptmx exists
      (and pseudo-terminals are supported), a devpts file system is mounted
      on /dev/pts.  Current systems already meet these requirements.
    
    * s390x requires GCC 7.1 or newer.  See gcc Bug 98269.
    
    Security related changes:
    
      CVE-2021-3326: An assertion failure during conversion from the
      ISO-20220-JP-3 character set using the iconv function has been fixed.
      This assertion was triggered by certain valid inputs in which the
      converted output contains a combined sequence of two wide characters
      crossing a buffer boundary.  Reported by Tavis Ormandy.
    
      CVE-2020-27618: An infinite loop has been fixed in the iconv program when
      invoked with input containing redundant shift sequences in the IBM1364,
      IBM1371, IBM1388, IBM1390, or IBM1399 character sets.
    
      CVE-2020-29562: An assertion failure has been fixed in the iconv function
      when invoked with UCS4 input containing an invalid character.
    
      CVE-2019-25013: A buffer overflow has been fixed in the iconv function when
      invoked with EUC-KR input containing invalid multibyte input sequences.
    
    The following bugs are resolved with this release:
    
      [10635] libc: realpath portability patches
      [16124] dynamic-link: ld.so should allow to change argv[0]
      [17924] malloc: 'free' should not set errno
      [18683] libc: Linux faccessat implementation can incorrectly ignore
        AT_EACCESS
      [22899] libc: Use 64-bit readdir() in generic POSIX getcwd()
      [23249] libc: Epyc and other current AMD CPUs do not select the
        "haswell" platform subdirectory
      [24080] dynamic-link: Definition of "haswell" platform is inconsistent
        with GCC
      [24202] libc: m68k setjmp() saves incorrect 'a5' register in --enable-
        stack-protector=all
      [24941] libc: Make grantpt usable after multi-threaded fork in more
        cases
      [24970] libc: realpath mishandles EOVERFLOW; stat not needed anyway
      [24973] locale: iconv encounters segmentation fault when converting
        0x00 0xfe in EUC-KR to UTF-8 (CVE-2019-25013)
      [25399] string: undefined reference to `__warn_memset_zero_len' when
        changing gnuc version
      [25859] libc: glibc parser for /sys/devices/system/cpu/online is
        incorrect
      [25938] dynamic-link: ld.so.cache should store meaning of hwcap mask
        bits
      [25971] libc: s390 bits/hwcap.h out of sync with kernel
      [26053] libc: unlockpt fails with ENOTTY for non-ptmx descriptors
      [26100] libc: Race in syslog(3) with regards to tag printing.
      [26124] libc: Export <cpu-features.h>
      [26130] nscd: Inconsistent nscd cache during pruning
      [26203] libc: GLRO(dl_x86_cpu_features) may not be intialized
      [26224] locale: iconv hangs when converting some invalid inputs from
        several IBM character sets (CVE-2020-27618)
      [26341] libc: realpath cyclically call __alloca(path_max) to consume
        too much stack space
      [26343] manual: invalid documented return type for strerrorname_np(),
        strerrordesc_np(), sigdescr_np(), sigabbrev_np()
      [26376] libc: Namespace violation in stdio.h and sys/stat.h if build
        with optimization.
      [26383] locale: bind_textdomain_codeset doesn't accept //TRANSLIT
        anymore
      [26394] time: [2.33 Regression] FAIL: nptl/tst-join14
      [26534] math: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on
        non-FMA4 system
      [26552] dynamic-link: CPU_FEATURE_USABLE_P should be more conservative
      [26553] libc: mtx_init allows type set to "mtx_recursive" only
      [26555] string: strerrorname_np does not return the documented value
      [26592] libc: pointer arithmetic overflows in realpath
      [26600] network: Transaction ID collisions cause slow DNS lookups in
        getaddrinfo
      [26606] libc: [2.33 Regression] pselect is broken on x32
      [26615] libc: powerpc: libc segfaults when LD_PRELOADed with libgcc
      [26620] glob: fnmatch with collating symbols results in segmentation
        fault
      [26625] libc: [2.33 Regression] CET is disabled
      [26636] libc: 32-bit shmctl(IPC_INFO) crashes when shminfo struct is
        at the end of a memory mapping
      [26637] libc: semctl SEM_STAT_ANY fails to pass the buffer specified
        by the caller to the kernel
      [26639] libc: msgctl IPC_INFO and MSG_INFO return garbage
      [26647] build: [-Werror=array-parameter=] due to different
        declarations for __sigsetjmp
      [26648] libc: mkstemp is likely to fail on systems with non-stricly-
        monotonic clocks
      [26649] stdio: printf should handle non-normal x86 long double numbers
        gracefully (CVE-2020-29573)
      [26686] build: -Warray-parameter instances building with GCC 11
      [26687] build: -Warray-bounds instances building with GCC 11
      [26690] stdio: Aliasing violation in __vfscanf_internal
      [26691] nptl: Use a minimum guard size of 64 KiB on aarch64
      [26726] build: GCC warning calling new_composite_name with an array of
        one element
      [26736] libc: FAIL: misc/tst-sysvshm-linux
      [26737] libc: Random FAIL: rt/tst-shm
      [26791] libc: Missing O_CLOEXEC in sysconf.c
      [26798] dynamic-link: aarch64: variant PCS symbols may be incorrectly
        lazy bound
      [26801] nptl: pthread_mutex_clocklock with CLOCK_MONOTONIC can fail on
        PI mutexes
      [26818] string: aarch64: string tests may run ifunc variants that are
        not safe
      [26821] libc: Memory leak test failures on Fedora 33
      [26824] libc: FAIL: elf/tst-cpu-features-supports with recent trunk:
        FSGSBASE/LM/RDRAND check failure
      [26833] time: adjtime() with delta == NULL segfaults on armv7 32bit
        platform
      [26853] libc: aarch64: Missing unwind information in statically linked
        startup code
      [26923] locale: Assertion failure in iconv when converting invalid
        UCS4 (CVE-2020-29562)
      [26926] dynamic-link: aarch64: library dependencies are not bti
        protected
      [26932] libc: sh: Multiple floating point functions defined as stubs
        only since 2.31
      [26964] nptl: pthread_mutex_timedlock returning EAGAIN after futex is
        locked
      [26988] dynamic-link: aarch64: BTI mprotect address is not page
        aligned
      [27002] build: libc_freeres_fn build failure with GCC 11
      [27004] dynamic-link: ld.so is miscompiled by GCC 11
      [27008] dynamic-link: ld.so.cache should have endianness markup
      [27042] libc: [alpha] anonymous union in struct stat confuses
        detection logic
      [27053] libc: Conformance regression in system(3) (and probably also
        pclose(3))
      [27072] dynamic-link: static pie ifunc resolvers run before hwcap is
        setup
      [27077] network: Do not reload /etc/nsswitch.conf from chroot
      [27083] libc: Unsafe unbounded alloca in addmntent
      [27104] dynamic-link: The COMMON_CPUID_INDEX_MAX handshake does not
        work
      [27130] string: "rep movsb" performance issue
      [27150] libc: alpha: wait4() is unavailable in static linking
      [27177] dynamic-link:
        GLIBC_TUNABLES=glibc.cpu.x86_ibt=on:glibc.cpu.x86_shstk=on doesn't
        work
      [27222] dynamic-link: Incorrect sysdeps/x86/tst-cpu-features-cpuinfo.c
      [27237] malloc: deadlock in malloc/tst-malloc-stats-cancellation
      [27256] locale: Assertion failure in ISO-2022-JP-3 gconv module
        related to combining characters (CVE-2021-3326)
    
    Release Notes
    =============
    
    https://sourceware.org/glibc/wiki/Release/2.33
    
    Contributors
    ============
    
    This release was made possible by the contributions of many people.
    The maintainers are grateful to everyone who has contributed
    changes or bug reports.  These include:
    
    Adhemerval Zanella
    Alexandra Hájková
    Alistair Francis
    Andreas Schwab
    Anssi Hannula
    Arjun Shankar
    Benno Schulenberg
    Carlos O'Donell
    Chen Li
    Cooper Qu
    Corinna Vinschen
    DJ Delorie
    Dmitry V. Levin
    Fangrui Song
    Florian Weimer
    Guillaume Gardet
    H.J. Lu
    Jakub Jelinek
    Jangwoong Kim
    Jeremie Koenig
    Jim Wilson
    John David Anglin
    John McCabe
    Jonathan Wakely
    Jonny Grant
    Joseph Myers
    Lode Willems
    Lucas A. M. Magalhaes
    Lukasz Majewski
    Maciej W. Rozycki
    Mao Han
    Marc Aurèle La France
    Marius Hillenbrand
    Mark Wielaard
    Martin Liska
    Martin Sebor
    Matheus Castanho
    Matt Turner
    Maximilian Krüger
    Michael Colavita
    Ondřej Hošek
    Patrick McGehearty
    Patsy Griffin
    Paul E. Murphy
    Paul Eggert
    Paul Zimmermann
    Prasanth R
    Raoni Fassina Firmino
    Raphael M Zinsly
    Raphael Moreira Zinsly
    Richard Braun
    Richard Earnshaw
    Rolf Eike Beer
    Sajan Karumanchi
    Samuel Thibault
    Sergei Trofimovich
    Shuo Wang
    Siddhesh Poyarekar
    Stafford Horne
    Stefan Liebler
    Szabolcs Nagy
    Thorsten Kukuk
    Tulio Magno Quites Machado Filho
    Vincent Chen
    Vincent Mihalkovic
    Vineet Gupta
    W. Hashimoto
    Wilco Dijkstra
    Xiaoming Ni
    Zong Li
    liqingqing
    Érico Rolim
    
    
  • glibc-2.32.9000
    Open master branch for glibc 2.33 development.
    
  • glibc-2.32
    The GNU C Library
    =================
    
    The GNU C Library version 2.32 is now available.
    
    The GNU C Library is used as *the* C library in the GNU system and
    in GNU/Linux systems, as well as many other systems that use Linux
    as the kernel.
    
    The GNU C Library is primarily designed to be a portable
    and high performance C library.  It follows all relevant
    standards including ISO C11 and POSIX.1-2017.  It is also
    internationalized and has one of the most complete
    internationalization interfaces known.
    
    The GNU C Library webpage is at http://www.gnu.org/software/libc/
    
    Packages for the 2.32 release may be downloaded from:
            http://ftpmirror.gnu.org/libc/
            http://ftp.gnu.org/gnu/libc/
    
    The mirror list is at http://www.gnu.org/order/ftp.html
    
    NEWS for version 2.32
    =====================
    
    Major new features:
    
    * Unicode 13.0.0 Support: Character encoding, character type info, and
      transliteration tables are all updated to Unicode 13.0.0, using
      generator scripts contributed by Mike FABIAN (Red Hat).
    
    * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
    
    * Support for Synopsys ARC HS cores (ARCv2 ISA) running Linux has been
      added. This port requires at least binutils-2.32, gcc-8.3 and Linux-5.1.
      Three ABIs are supported:
    
         - arc-linux-gnu
         - arc-linux-gnuhf
         - arceb-linux-gnu
    
      The arc* ABI is little-endian while arceb is big-endian. All ABIs use
      64-bit time (y2038 safe) and 64-bit file offsets (LFS default).
    
    * The GNU C Library now loads audit modules listed in the DT_AUDIT and
      DT_DEPAUDIT dynamic section entries of the main executable.
    
    * powerpc64le supports IEEE128 long double libm/libc redirects when
      using the -mabi=ieeelongdouble to compile C code on supported GCC
      toolchains.  It is recommended to use GCC 8 or newer when testing
      this option.
    
    * To help detect buffer overflows and other out-of-bounds accesses
      several APIs have been annotated with GCC 'access' attribute.  This
      should help GCC 10 issue better warnings.
    
    * On Linux, functions the pthread_attr_setsigmask_np and
      pthread_attr_getsigmask_np have been added.  They allow applications
      to specify the signal mask of a thread created with pthread_create.
    
    * The GNU C Library now provides the header file <sys/single_threaded.h>
      which declares the variable __libc_single_threaded.  Applications are
      encouraged to use this variable for single-thread optimizations,
      instead of weak references to symbols historically defined in
      libpthread.
    
    * The functions sigabbrev_np and sigdescr_np have been added.  The
      sigabbrev_np returns the abbreviated signal name (e.g. "HUP" for SIGHUP)
      while sigdescr_np returns a string describing the signal number (e.g
      "Hangup" for SIGHUP).  Different than strsignal, sigdescr_np does not
      attempt to translate the return description, both functions return
      NULL for an invalid signal number.
    
      They should be used instead of sys_siglist or sys_sigabbrev and they
      are both thread and async-signal safe.  These functions are GNU extensions.
    
    * The functions strerrorname_np and strerrordesc_np have been added.  The
      strerroname_np returns error number name (e.g. "EINVAL" for EINVAL) while
      strerrordesc_np returns string describing error number
      (e.g "Invalid argument" for EINVAL).  Different than strerror,
      strerrordesc_np does not attempt to translate the return description, both
      functions return NULL for an invalid error number.
    
      They should be used instead of sys_errlist and sys_nerr, both are
      thread and async-signal safe.  These functions are GNU extensions.
    
    * AArch64 now supports standard branch protection security hardening
      in glibc when it is built with a GCC that is configured with
      --enable-standard-branch-protection (or if -mbranch-protection=standard
      flag is passed when building both GCC target libraries and glibc,
      in either case a custom GCC is needed).  This includes branch target
      identification (BTI) and pointer authentication for return addresses
      (PAC-RET).  They require armv8.5-a and armv8.3-a architecture
      extensions respectively for the protection to be effective,
      otherwise the used instructions are nops.  User code can use PAC-RET
      without libc support, but BTI requires a libc that is built with BTI
      support, otherwise runtime objects linked into user code will not be
      BTI compatible.
    
    Deprecated and removed features, and other changes affecting compatibility:
    
    * Remove configure option --enable-obsolete-rpc.  Sun RPC is removed
      from glibc.  This includes the rpcgen program, librpcsvc, and the Sun
      RPC header files.  Backward compatibility for old programs is kept
      only for architectures and ABIs that have been added in or before
      glibc 2.31.  New programs need to use TI-RPC
      <http://git.linux-nfs.org/?p=steved/libtirpc.git;a=summary> and
      rpcsvc-proto <https://github.com/thkukuk/rpcsvc-proto>.
    
    * Remove configure option --enable-obsolete-nsl.  libnsl is only built
      as shared library for backward compatibility and the NSS modules "nis"
      and "nisplus" are not built at all and libnsl's headers aren't
      installed.  This compatibility is kept only for architectures and ABIs
      that have been added in or before version 2.28.  Replacement
      implementations based on TI-RPC, which additionally support IPv6, are
      available from <https://github.com/thkukuk/>.  This change does not
      affect the "compat" NSS module, which does not depended on libnsl
      since 2.27 and thus can be used without NIS.
    
    * The deprecated <sys/sysctl.h> header and the sysctl function have been
      removed.  To support old binaries, the sysctl function continues to
      exist as a compatibility symbol (on those architectures which had it),
      but always fails with ENOSYS.  This reflects the removal of the system
      call from all architectures, starting with Linux 5.5.
    
    * The sstk function is no longer available to newly linked binaries.
      Its implementation always returned with a failure, and the function
      was not declared in any header file.
    
    * The legacy signal handling functions siginterrupt, sigpause, sighold,
      sigrelse, sigignore and sigset, and the sigmask macro have been
      deprecated.  Applications should use the sigsuspend, sigprocmask and
      sigaction functions instead.
    
    * ldconfig now defaults to the new format for ld.so.cache. glibc has
      already supported this format for almost 20 years.
    
    * The deprecated arrays sys_siglist, _sys_siglist, and sys_sigabbrev
      are no longer available to newly linked binaries, and their declarations
      have been removed from <string.h>.  They are exported solely as
      compatibility symbols to support old binaries.  All programs should use
      strsignal instead.
    
    * The deprecated symbols sys_errlist, _sys_errlist, sys_nerr, and _sys_nerr
      are no longer available to newly linked binaries, and their declarations
      have been removed from from <stdio.h>.  They are exported solely as
      compatibility symbols to support old binaries.  All programs should use
      strerror or strerror_r instead.
    
    * Both strerror and strerror_l now share the same internal buffer in the
      calling thread, meaning that the returned string pointer may be invalided
      or contents might be overwritten on subsequent calls in the same thread or
      if the thread is terminated.  It makes strerror MT-safe.
    
    * Using weak references to libpthread functions such as pthread_create
      or pthread_key_create to detect the singled-threaded nature of a
      program is an obsolescent feature.  Future versions of glibc will
      define pthread_create within libc.so.6 itself, so such checks will
      always flag the program as multi-threaded.  Applications should check
      the __libc_single_threaded variable declared in
      <sys/single_threaded.h> instead.
    
    * The "files" NSS module no longer supports the "key" database (used for
      secure RPC).  The contents of the /etc/publickey file will be ignored,
      regardless of the settings in /etc/nsswitch.conf.  (This method of
      storing RPC keys only supported the obsolete and insecure AUTH_DES
      flavor of secure RPC.)
    
    * The __morecore and __after_morecore_hook malloc hooks and the default
      implementation __default_morecore have been deprecated.  Applications
      should use malloc interposition to change malloc behavior, and mmap to
      allocate anonymous memory.  A future version of glibc may require that
      applications which use the malloc hooks must preload a special shared
      object, to enable the hooks.
    
    * The hesiod NSS module has been deprecated and will be removed in a
      future version of glibc.  System administrators are encouraged to
      switch to other approaches for networked account databases, such as
      LDAP.
    
    Changes to build and runtime requirements:
    
    * powerpc64le requires GCC 7.4 or newer.  This is required for supporting
      long double redirects.
    
    Security related changes:
    
      CVE-2016-10228: An infinite loop has been fixed in the iconv program when
      invoked with the -c option and when processing invalid multi-byte input
      sequences.  Reported by Jan Engelhardt.
    
      CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
      corruption when they were passed a pseudo-zero argument.  Reported by Guido
      Vranken / ForAllSecure Mayhem.
    
      CVE-2020-1752: A use-after-free vulnerability in the glob function when
      expanding ~user has been fixed.
    
      CVE-2020-6096: A signed comparison vulnerability in the ARMv7 memcpy and
      memmove functions has been fixed.  Discovered by Jason Royes and Samual
      Dytrych of the Cisco Security Assessment and Penetration Team (See
      TALOS-2020-1019).
    
    The following bugs are resolved with this release:
    
      [9809] localedata: ckb_IQ: new Kurdish Sorani locale
      [10441] manual: Backtraces code example lacks error checking
      [10815] librt: [timer_create / SIGEV_THREAD] signalmask of
        timer_sigev_thread dangerous
      [14231] stdio: stdio-common tests memory requirements
      [14578] libc: /proc-based emulation for lchmod, fchmodat
      [16272] dynamic-link: dlopen()ing a DT_FILTER library crashes if
        filtee has constructor
      [19519] locale: iconv(1) with -c option hangs on illegal multi-byte
        sequences (CVE-2016-10228)
      [19737] admin: Doc page “20.5.2 Infinity and NaN” has incorrect HTML
        character entities for infinity & pi
      [20338] libc: Parsing of /etc/gshadow can return bad pointers causing
        segfaults in applications
      [20543] libc: Please move from .gnu.linkonce to comdat
      [22489] network: gcc warns about implicit convertion in
        ICMP6_FILTER_SETPASS with -Wsign-conversion
      [22525] localedata: or_IN  LC_COLLATE does not use copy "iso14651_t1"
      [23294] math: Complex _FloatN functions are redirected to the wrong
        function with -mlong-double-64
      [23296] libc: Data race in setting function descriptor during lazy
        binding
      [23668] dynamic-link: ldconfig: Default to the new format for
        ld.so.cache
      [23819] hurd: hurd: Add C11 thread support
      [23990] build: test-container error out on failure to exec child.
      [23991] build: shell-container typo in run_command_array
      [24638] manual: Error in example of parsing a template string
      [24654] manual: Wrong declaration of wcschr in libc manual
      [24943] dynamic-link: Support DT_AUDIT, DT_DEPAUDIT in the dynamic
        linker
      [25051] dynamic-link: aarch64, powerpc64 uses surplus static tls for
        dynamically loaded dsos
      [25098] nptl: nptl: ctype classification functions are not AS-Safe
      [25219] libc: improve out-of-bounds checking with GCC 10 attribute
        access
      [25262] libc: getcontext/setcontext/swapcontext unnecessarily save and
        restore EAX, ECX and EDX
      [25397] dynamic-link: Legacy bitmap doesn't cover jitted code
      [25414] glob: 'glob' use-after-free bug (CVE-2020-1752)
      [25420] network: Race condition in resolv_conf.c can result in caching
        stale configuration forever
      [25487] math: sinl() stack corruption from crafted input
        (CVE-2020-10029)
      [25506] build: configure: broken detection of STT_GNU_IFUNC when GCC
        defaults to PIE
      [25523] libc: MIPS/Linux inline syscall template is miscompiled
      [25620] libc: Signed comparison vulnerability in the ARMv7 memcpy()
        (CVE-2020-6096)
      [25623] libc: test-sysvmsg, test-sysvsem, test-sysvshm fail with 2.31
        on 32 bit and old kernel
      [25635] libc: arm: Wrong sysdep order selection for soft-fp
      [25639] localedata: Some names of days and months wrongly spelt in
        Occitan
      [25657] libc: sigprocmask() and sigisemptyset() manipulate different
        amount of sigset_t bytes
      [25691] stdio: printf: memory leak when printing long multibyte
        strings
      [25715] libc: system() returns wrong errors when posix_spawn fails
      [25733] malloc: mallopt(M_MXFAST) can set global_max_fast to 0
      [25734] locale: mbrtowc with Big5-HKSCS fails to reset conversion
        state for conversions that produce two Unicode code points
      [25765] nptl: Incorrect futex syscall in __pthread_disable_asynccancel
        for linux x86_64 leads to livelock
      [25788] dynamic-link: [i386] -fno-omit-frame-pointer in CFLAGS causes
        test failures, invalid instruction in ld.so
      [25790] glob: Typo in tst-fnmatch.input
      [25810] libc: x32: Incorrect syscall entries with pointer, off_t and
        size_t
      [25819] localedata: Update locale data to Unicode 13.0.0
      [25824] libc: Abnormal function of strnlen in aarch64
      [25887] dynamic-link: Wasted space in _dl_x86_feature_1[1]
      [25896] libc: Incorrect prctl
      [25902] libc: Bad LOADARGS_N
      [25905] dynamic-link: VSX registers are corrupted during PLT
        resolution when glibc is built with --disable-multi-arch and --with-
        cpu=power9
      [25933] string: Off by one error in __strncmp_avx2 when
        length=VEC_SIZE*4 and strings are at page boundaries can cause a
        segfault
      [25942] nptl: Deadlock on stack_cache_lock between __nptl_setxid and
        exiting detached thread
      [25966] libc: Incorrect access of __x86_shared_non_temporal_threshold
        for x32
      [25976] nss: internal_end*ent in nss_compat may clobber errno, hiding
        ERANGE
      [25999] nptl: Use-after-free issue in pthread_getaddr_default_np
      [26073] math: getpayload() has wrong return value
      [26076] dynamic-link: dlmopen crashes after failing to load
        dependencies in audit mode
      [26120] localedata: column width of  of some Korean
        JUNGSEONG/JONGSEONG characters wrong (should be 0)
      [26128] libc: Incorrect bit_cpu_CLFLUSHOPT
      [26133] libc: Incorrect need_arch_feature_F16C
      [26137] libc: strtod() triggers exception FE_INEXACT on reasonable
        input
      [26149] libc: PKU is usable only if OSPKE is set
      [26173] libc: powerpc64*: Add @notoc to calls to functions that do not
        preserve r2
      [26208] libc: Incorrect bit_cpu_CLFSH
      [26210] network: Incorrect use of hidden symbols for global sunrpc
        variables
      [26211] stdio: printf integer overflow calculating allocation size
      [26214] stdio: printf_fp double free
      [26215] stdio: printf_fp memory leak
      [26232] time: FAIL: support/tst-timespec for 32-bit targets
      [26258] nss: nss_compat should not read input files with mmap
      [26332] string: Incorrect cache line size load causes memory
        corruption in memset
    
    Release Notes
    =============
    
    https://sourceware.org/glibc/wiki/Release/2.32
    
    Contributors
    ============
    
    This release was made possible by the contributions of many people.
    The maintainers are grateful to everyone who has contributed
    changes or bug reports.  These include:
    
    Adhemerval Zanella
    Alan Modra
    Alex Butler
    Alexander Anisimov
    Alistair Francis
    Andrea Corallo
    Andreas K. Hüttel
    Andreas Schwab
    Anton Blanchard
    Anton Blanchard via Libc-alpha
    Arjun Shankar
    Aurelien Jarno
    Aurélien Aptel
    Carlos O'Donell
    Chung-Lin Tang
    DJ Delorie
    David Kilroy
    Evgeny Eremin
    Eyal Itkin
    Fangrui Song
    Florian Weimer
    Gabriel F. T. Gomes
    Girish Joshi
    H.J. Lu
    John David Anglin
    John Marshall
    Jonathan Wakely
    Joseph Myers
    Josh Triplett
    Jwtiyar Nariman
    Krzysztof Koch
    Lexi Shao
    Lucas A. M. Magalhaes
    Lukasz Majewski
    Maciej W. Rozycki
    Martin Sebor
    Matheus Castanho
    Mathieu Desnoyers
    Michael Hudson-Doyle
    Mike FABIAN
    Patsy Franklin
    Paul E. Murphy
    Paul Eggert
    Paul Zimmermann
    Petr Vorel
    Rafał Lużyński
    Rajalakshmi Srinivasaraghavan
    Raphael Moreira Zinsly
    Rogerio Alves
    Samuel Thibault
    Sergey
    Shen-Ta Hsieh
    Siddhesh Poyarekar
    Simon Marchi
    Stefan Liebler
    Sudakshina Das
    Sunil K Pandey
    Szabolcs Nagy
    Tulio Magno Quites Machado Filho
    Vineet Gupta
    WANG Xuerui
    Wilco Dijkstra
    guojinhui
    kokoye2007
    mayshao
    mayshao-oc
    
    
  • glibc-2.31.9000
    Open master branch for 2.32 development
  • glibc-2.31
    The GNU C Library
    =================
    
    The GNU C Library version 2.31 is now available.
    
    The GNU C Library is used as *the* C library in the GNU system and
    in GNU/Linux systems, as well as many other systems that use Linux
    as the kernel.
    
    The GNU C Library is primarily designed to be a portable
    and high performance C library.  It follows all relevant
    standards including ISO C11 and POSIX.1-2017.  It is also
    internationalized and has one of the most complete
    internationalization interfaces known.
    
    The GNU C Library webpage is at http://www.gnu.org/software/libc/
    
    Packages for the 2.31 release may be downloaded from:
            http://ftpmirror.gnu.org/libc/
            http://ftp.gnu.org/gnu/libc/
    
    The mirror list is at http://www.gnu.org/order/ftp.html
    
    NEWS for version 2.31
    =====================
    
    Major new features:
    
    * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
      enable features from the draft ISO C2X standard.  Only some features from
      this draft standard are supported by the GNU C Library, and as the draft
      is under active development, the set of features enabled by this macro is
      liable to change.  Features from C2X are also enabled by _GNU_SOURCE, or
      by compiling with "gcc -std=gnu2x".
    
    * The <math.h> functions that round their results to a narrower type now
      have corresponding type-generic macros in <tgmath.h>, as defined in TS
      18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
      Clarification Request 13 to TS 18661-3.
    
    * The function pthread_clockjoin_np has been added, enabling join with a
      terminated thread with a specific clock.  It allows waiting against
      CLOCK_MONOTONIC and CLOCK_REALTIME.  This function is a GNU extension.
    
    * New locale added: mnw_MM (Mon language spoken in Myanmar).
    
    * The DNS stub resolver will optionally send the AD (authenticated data) bit
      in queries if the trust-ad option is set via the options directive in
      /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options).  In this
      mode, the AD bit, as provided by the name server, is available to
      applications which call res_search and related functions.  In the default
      mode, the AD bit is not set in queries, and it is automatically cleared in
      responses, indicating a lack of DNSSEC validation.  (Therefore, the name
      servers and the network path to them are treated as untrusted.)
    
    Deprecated and removed features, and other changes affecting compatibility:
    
    * The totalorder and totalordermag functions, and the corresponding
      functions for other floating-point types, now take pointer arguments to
      avoid signaling NaNs possibly being converted to quiet NaNs in argument
      passing.  This is in accordance with the resolution of Clarification
      Request 25 to TS 18661-1, as applied for C2X.  Existing binaries that pass
      floating-point arguments directly will continue to work.
    
    * The obsolete function stime is no longer available to newly linked
      binaries, and its declaration has been removed from <time.h>.
      Programs that set the system time should use clock_settime instead.
    
    * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
      in a future version of glibc.  In this release, the header still exists
      but calling ftime will cause a compiler warning.  All programs should use
      gettimeofday or clock_gettime instead.
    
    * The gettimeofday function no longer reports information about a
      system-wide time zone.  This 4.2-BSD-era feature has been deprecated for
      many years, as it cannot handle the full complexity of the world's
      timezones, but hitherto we have supported it on a best-effort basis.
      Changes required to support 64-bit time_t on 32-bit architectures have
      made this no longer practical.
    
      As of this release, callers of gettimeofday with a non-null 'tzp' argument
      should expect to receive a 'struct timezone' whose tz_minuteswest and
      tz_dsttime fields are zero.  (For efficiency reasons, this does not always
      happen on a few Linux-based ports.  This will be corrected in a future
      release.)
    
      All callers should supply a null pointer for the 'tzp' argument to
      gettimeofday.  For accurate information about the time zone associated
      with the current time, use the localtime function.
    
      gettimeofday itself is obsolescent according to POSIX.  We have no plans
      to remove access to this function, but portable programs should consider
      using clock_gettime instead.
    
    * The settimeofday function can still be used to set a system-wide time
      zone when the operating system supports it.  This is because the Linux
      kernel reused the API, on some architectures, to describe a system-wide
      time-zone-like offset between the software clock maintained by the kernel,
      and the "RTC" clock that keeps time when the system is shut down.
    
      However, to reduce the odds of this offset being set by accident,
      settimeofday can no longer be used to set the time and the offset
      simultaneously.  If both of its two arguments are non-null, the call
      will fail (setting errno to EINVAL).
    
      Callers attempting to set this offset should also be prepared for the call
      to fail and set errno to ENOSYS; this already happens on the Hurd and on
      some Linux architectures.  The Linux kernel maintainers are discussing a
      more principled replacement for the reused API.  After a replacement
      becomes available, we will change settimeofday to fail with ENOSYS on all
      platforms when its 'tzp' argument is not a null pointer.
    
      settimeofday itself is obsolescent according to POSIX.  Programs that set
      the system time should use clock_settime and/or the adjtime family of
      functions instead.  We may cease to make settimeofday available to newly
      linked binaries after there is a replacement for Linux's time-zone-like
      offset API.
    
    * SPARC ISA v7 is no longer supported.  v8 is still supported, but only if
      the optional CAS instruction is implemented (for instance, LEON processors
      are still supported, but SuperSPARC processors are not).
    
      As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
      configurations.
    
    * If a lazy binding failure happens during dlopen, during the execution of
      an ELF constructor, the process is now terminated.  Previously, the
      dynamic loader would return NULL from dlopen, with the lazy binding error
      captured in a dlerror message.  In general, this is unsafe because
      resetting the stack in an arbitrary function call is not possible.
    
    * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
      executable stack unless explicitly configured at build time to require
      minimum kernel version 4.8 or newer.  This is because executing
      floating-point branches on a non-executable stack on Linux kernels prior to
      4.8 can lead to application crashes for some MIPS configurations. While
      currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
      expected to enable non-executable stack by default  with PT_GNU_STACK by
      default and is thus likely to trigger a crash on older kernels.
    
      The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
      non-executable stack while dropping support for older kernels.
    
    * System call wrappers for time system calls now use the new time64 system
      calls when available. On 32-bit targets, these wrappers attempt to call
      the new system calls first and fall back to the older 32-bit time system
      calls if they are not present.  This may cause issues in environments
      that cannot handle unsupported system calls gracefully by returning
      -ENOSYS. Seccomp sandboxes are affected by this issue.
    
    Changes to build and runtime requirements:
    
    * It is no longer necessary to have recent Linux kernel headers to build
      working (non-stub) system call wrappers on all architectures except 64-bit
      RISC-V.  64-bit RISC-V requires a minimum kernel headers version of 5.0.
    
    * The ChangeLog file is no longer present in the toplevel directory of the
      source tree.  ChangeLog files are located in the ChangeLog.old directory as
      ChangeLog.N where the highest N has the latest entries.
    
    Security related changes:
    
      CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
      environment variable during program execution after a security
      transition, allowing local attackers to restrict the possible mapping
      addresses for loaded libraries and thus bypass ASLR for a setuid
      program.  Reported by Marcin Kościelnicki.
    
    The following bugs are resolved with this release:
    
      [12031] localedata: iconv -t ascii//translit with Greek characters
      [15813] libc: Multiple issues in __gen_tempname
      [17726] libc: [arm, sparc] profil_counter should be compat symbol
      [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
      [19767] libc: vdso is not used with static linking
      [19903] hurd: Shared mappings not being inherited by children processes
      [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
      [20839] dynamic-link: Incomplete rollback of dynamic linker state on
        linking failure
      [23132] localedata: Missing transliterations in Miscellaneous Mathematical
        Symbols-A/B Unicode blocks
      [23518] libc: Eliminate __libc_utmp_jump_table
      [24026] malloc: malloc_info() returns wrong numbers
      [24054] localedata: Many locales are missing date_fmt
      [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
      [24304] dynamic-link: Lazy binding failure during ELF
        constructors/destructors is not fatal
      [24376] libc: RISC-V symbol size confusion with _start
      [24682] localedata: zh_CN first weekday should be Monday per GB/T
        7408-2005
      [24824] libc: test-in-container does not install charmap files compatible
        with localedef
      [24844] regex: regex bad pointer / leakage if malloc fails
      [24867] malloc: Unintended malloc_info formatting changes
      [24879] libc: login: utmp alarm timer can arrive after lock acquisition
      [24880] libc: login: utmp implementation uses struct flock with fcntl64
      [24882] libc: login: pututline uses potentially outdated cache
      [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
      [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
        utmp entries
      [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
        ABSOLUTE ABI
      [24930] dynamic-link: dlopen of PIE executable can result in
        _dl_allocate_tls_init assertion failure
      [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
        (stringop-overflow error)
      [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
        functions other  can lead to crashes
      [24967] libc: jemalloc static linking causes runtime failure
      [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
        unconditionally
      [25035] libc: sbrk() failure handled poorly in tunables_strdup
      [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
      [25097] libc: new -Warray-bounds with GCC 10
      [25112] dynamic-link: dlopen must not make new objects accessible when it
        still can fail with an error
      [25139] localedata: Please add the new mnw_MM locale
      [25149] regex: Array bounds violation in proceed_next_node
      [25157] dynamic-link: Audit cookie for the dynamic loader is not
        initialized correctly
      [25189] libc: glibc's __glibc_has_include causes issues with clang
        -frewrite-includes
      [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
        value to an unsigned
      [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
        binaries (CVE-2019-19126)
      [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
        protection
      [25226] string: strstr: Invalid result if needle crosses page on s390-z15
        ifunc variant.
      [25232] string: <string.h> does not enable const correctness for strchr et
        al. for Clang++
      [25233] localedata: Consider "." as the thousands separator for sl_SI
        (Slovenian)
      [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
      [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
      [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
        with -std=c11
      [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
      [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
        part
      [25396] dynamic-link: Failing dlopen can leave behind dangling GL
        (dl_initfirst) link map pointer
      [25401] malloc: pvalloc must not have __attribute_alloc_size__
      [25423] libc: Array overflow in backtrace on powerpc
      [25425] network: Missing call to __resolv_context_put in
        getaddrinfo.c:gethosts
    
    Release Notes
    =============
    
    https://sourceware.org/glibc/wiki/Release/2.31
    
    Contributors
    ============
    
    This release was made possible by the contributions of many people.
    The maintainers are grateful to everyone who has contributed
    changes or bug reports.  These include:
    
    Adhemerval Zanella
    Alexandra Hájková
    Alistair Francis
    Andreas Schwab
    Andrew Eggenberger
    Arjun Shankar
    Aurelien Jarno
    Carlos O'Donell
    Chung-Lin Tang
    DJ Delorie
    Dmitry V. Levin
    Dragan Mladjenovic
    Egor Kobylkin
    Emilio Cobos Álvarez
    Emilio Pozuelo Monfort
    Feng Xue
    Florian Weimer
    Gabriel F. T. Gomes
    Gustavo Romero
    H.J. Lu
    Ian Kent
    James Clarke
    Jeremie Koenig
    John David Anglin
    Joseph Myers
    Kamlesh Kumar
    Krzysztof Koch
    Leandro Pereira
    Lucas A. M. Magalhaes
    Lukasz Majewski
    Marcin Kościelnicki
    Matheus Castanho
    Mihailo Stojanovic
    Mike Crowe
    Mike FABIAN
    Niklas Hambüchen
    Paul A. Clarke
    Paul Eggert
    Petr Vorel
    Rafal Luzynski
    Rafał Lużyński
    Rajalakshmi Srinivasaraghavan
    Raoni Fassina Firmino
    Richard Braun
    Samuel Thibault
    Sandra Loosemore
    Siddhesh Poyarekar
    Stefan Liebler
    Svante Signell
    Szabolcs Nagy
    Talachan Mon
    Thomas Schwinge
    Tim Rühsen
    Tulio Magno Quites Machado Filho
    Wilco Dijkstra
    Xuelei Zhang
    Zack Weinberg
    liqingqing
    
    
  • changelog-ends-here
  • glibc-2.30.9000
    Open master branch for glibc 2.30 development.
    
  • glibc-2.30
    0a8262a1 · Tag 2.30 release. ·
    The GNU C Library
    =================
    
    The GNU C Library version 2.30 is now available.
    
    The GNU C Library is used as *the* C library in the GNU system and
    in GNU/Linux systems, as well as many other systems that use Linux
    as the kernel.
    
    The GNU C Library is primarily designed to be a portable
    and high performance C library.  It follows all relevant
    standards including ISO C11 and POSIX.1-2017.  It is also
    internationalized and has one of the most complete
    internationalization interfaces known.
    
    The GNU C Library webpage is at http://www.gnu.org/software/libc/
    
    Packages for the 2.30 release may be downloaded from:
            http://ftpmirror.gnu.org/libc/
            http://ftp.gnu.org/gnu/libc/
    
    The mirror list is at http://www.gnu.org/order/ftp.html
    
    NEWS for version 2.30
    =====================
    
    Major new features:
    
    * Unicode 12.1.0 Support: Character encoding, character type info, and
      transliteration tables are all updated to Unicode 12.1.0, using
      generator scripts contributed by Mike FABIAN (Red Hat).
    
    * The dynamic linker accepts the --preload argument to preload shared
      objects, in addition to the LD_PRELOAD environment variable.
    
    * The twalk_r function has been added.  It is similar to the existing
      twalk function, but it passes an additional caller-supplied argument
      to the callback function.
    
    * On Linux, the getdents64, gettid, and tgkill functions have been added.
    
    * Minguo (Republic of China) calendar support has been added as an
      alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
      nan_TW, lzh_TW.
    
    * The entry for the new Japanese era has been added for ja_JP locale.
    
    * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
      pvalloc, memalign, and posix_memalign fail now with total object size
      larger than PTRDIFF_MAX.  This is to avoid potential undefined behavior with
      pointer subtraction within the allocated object, where results might
      overflow the ptrdiff_t type.
    
    * The dynamic linker no longer refuses to load objects which reference
      versioned symbols whose implementation has moved to a different soname
      since the object has been linked.  The old error message, symbol
      FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
      link time reference, is gone.
    
    * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
      pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
      functions.  These behave similarly to their "timed" equivalents, but also
      accept a clockid_t parameter to determine which clock their timeout should
      be measured against.  All functions allow waiting against CLOCK_MONOTONIC
      and CLOCK_REALTIME.  The decision of which clock to be used is made at the
      time of the wait (unlike with pthread_condattr_setclock, which requires
      the clock choice at initialization time).
    
    * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
      work, new resolvers can use a second argument which can be extended in
      the future, currently it contains the AT_HWCAP2 value.
    
    Deprecated and removed features, and other changes affecting compatibility:
    
    * The copy_file_range function fails with ENOSYS if the kernel does not
      support the system call of the same name.  Previously, user space
      emulation was performed, but its behavior did not match the kernel
      behavior, which was deemed too confusing.  Applications which use the
      copy_file_range function can no longer rely on glibc to provide a fallback
      on kernels that do not support the copy_file_range system call, and if
      this function returns ENOSYS, they will need to use their own fallback.
      Support for copy_file_range for most architectures was added in version
      4.5 of the mainline Linux kernel.
    
    * The functions clock_gettime, clock_getres, clock_settime,
      clock_getcpuclockid, clock_nanosleep were removed from the librt library
      for new applications (on architectures which had them).  Instead, the
      definitions in libc will be used automatically, which have been available
      since glibc 2.17.
    
    * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
      and <sys/stropts.h> have been removed.
    
    * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
      resolver flag (deprecated in glibc 2.25) have been removed.
    
    * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
      resolver have been removed from <resolv.h>.
    
    * With --enable-bind-now, installed programs are now linked with the
      BIND_NOW flag.
    
    * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
      configurations) has been removed, following the deprecation of this
      subarchitecture in version 8 of GCC, and its removal in version 9.
    
    * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
      header have been removed.
    
    * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
      deprecated and will be removed from a future version of glibc.
      Application should directly access /proc instead.  For obtaining random
      bits, the getentropy function can be used.
    
    Changes to build and runtime requirements:
    
    * GCC 6.2 or later is required to build the GNU C Library.
    
      Older GCC versions and non-GNU compilers are still supported when
      compiling programs that use the GNU C Library.
    
    Security related changes:
    
      CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
      size.  For x86-64, memcmp on an object size larger than SSIZE_MAX
      has undefined behavior.  On x32, the size_t argument may be passed
      in the lower 32 bits of the 64-bit RDX register with non-zero upper
      32 bits.  When it happened with the sign bit of RDX register set,
      memcmp gave the wrong result since it treated the size argument as
      zero.  Reported by H.J. Lu.
    
      CVE-2019-9169: Attempted case-insensitive regular-expression match
      via proceed_next_node in posix/regexec.c leads to heap-based buffer
      over-read.  Reported by Hongxu Chen.
    
    The following bugs are resolved with this release:
    
      [2872] locale: Transliteration Cyrillic -> ASCII fails
      [6399] libc: gettid() should have a wrapper
      [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
      [16976] glob: fnmatch unbounded stack VLA for collating symbols
      [17396] localedata: globbing for locale by [[.collating-element.]]
      [18035] dynamic-link: pldd does no longer work, enters infinite loop
      [18465] malloc: memusagestat is built using system C library
      [18830] locale: iconv -c -f ascii with >buffer size worth of input before
        invalid input drops valid char
      [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
      [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
      [21897] localedata: Afar locales: Fix mon, abmon, and abday
      [22964] localedata: The Japanese Era name will be changed on May 1, 2019
      [23352] malloc: __malloc_check_init still defined in public header
        malloc.h.
      [23403] nptl: Wrong alignment of TLS variables
      [23501] libc: nftw() doesn't return dangling symlink's inode
      [23733] malloc: Check the count before calling tcache_get()
      [23741] malloc: Missing __attribute_alloc_size__ in many allocation
        functions
      [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
      [23844] nptl: pthread_rwlock_trywrlock results in hang
      [23983] argparse: Missing compat versions of argp_failure and argp_error
        for long double = double
      [23984] libc: Missing compat versions of err.h and error.h functions for
        long double = double
      [23996] localedata: Dutch salutations
      [24040] libc: riscv64: unterminated call chain in __thread_start
      [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
        long timeouts
      [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
      [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
        checking for NULL.
      [24114] regex: regexec buffer read overrun in "grep -i
        '\(\(\)*.\)*\(\)\(\)\1'"
      [24122] libc: Segfaults if 0 returned from la_version
      [24153] stdio: Some input functions do not react to stdin assignment
      [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
        RDX is set) (CVE-2019-7309)
      [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
      [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
        not the default "nor"
      [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
        false positives, change to modern flexible array
      [24180] nptl: pthread_mutex_trylock does not use the correct order of
        instructions while maintaining the robust mutex list due to missing
        compiler barriers.
      [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
        unnecessary librt dependencies
      [24200] localedata: Revert first_weekday removal in en_IE locale
      [24211] nptl: Use-after-free in Systemtap probe in pthread_join
      [24215] nptl: pthread_timedjoin_np should be a cancellation point
      [24216] malloc: Check for large bin list corruption when inserting
        unsorted chunk
      [24228] stdio: old x86 applications that use legacy libio crash on exit
      [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
        to R_SPARC_H44
      [24293] localedata: Missing Minguo calendar support for TW locales
      [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
        tt_RU (Tatar) locale
      [24307] localedata: Update locale data to Unicode 12.0.0
      [24323] dynamic-link: dlopen should not be able open PIE objects
      [24335] build: "Obsolete types detected" with Linux 5.0 headers
      [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
        tt_RU (Tatar) locale
      [24370] localedata: Add lang_name for tt_RU locale
      [24372] locale: Binary locale files are not architecture independent
      [24394] time: strptime %Ey mis-parses final year of era
      [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
        was not used
      [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
        tests
      [24531] malloc: Malloc tunables give tcache assertion failures
      [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
        time_t changes
      [24535] localedata: Update locale data to Unicode 12.1.0
      [24537] build: nptl/tst-eintr1 test case can hit task limits on some
        kernels and break testing
      [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
      [24556] build: [GCC 9] error: ‘%s’ directive argument is null
        [-Werror=format-overflow=]
      [24570] libc: alpha: compat msgctl uses __IPC_64
      [24584] locale: Data race in __wcsmbs_clone_conv
      [24588] stdio: Remove codecvt vtables from libio
      [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
        -O3 -march=skylake
      [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
      [24632] stdio: Old binaries which use freopen with default stdio handles
        crash
      [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
        linked glibc
      [24652] localedata: szl_PL spelling correction
      [24695] nss: nss_db: calling getpwent after endpwent crashes
      [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
        in /etc/nsswitch.conf
      [24699] libc: mmap64 with very large offset broken on MIPS64 n32
      [24740] libc: getdents64 type confusion
      [24741] dynamic-link: ld.so should not require that a versioned symbol is
        always implemented in the same library
      [24744] libc: Remove copy_file_range emulation
      [24757] malloc: memusagestat is linked against system libpthread
      [24794] libc: Partial test suite run builds corrupt test-in-container
        testroot
    
    Release Notes
    =============
    
    https://sourceware.org/glibc/wiki/Release/2.30
    
    Contributors
    ============
    
    This release was made possible by the contributions of many people.
    The maintainers are grateful to everyone who has contributed
    changes or bug reports.  These include:
    
    Adam Maris
    Adhemerval Zanella
    Alexandra Hájková
    Andreas K. Hüttel
    Andreas Schwab
    Anton Youdkevitch
    Aurelien Jarno
    Carlos O'Donell
    DJ Delorie
    Daniil Zhilin
    David Abdurachmanov
    David Newall
    Dmitry V. Levin
    Egor Kobylkin
    Felix Yan
    Feng Xue
    Florian Weimer
    Gabriel F. T. Gomes
    Grzegorz Kulik
    H.J. Lu
    Jan Kratochvil
    Jim Wilson
    Joseph Myers
    Maciej W. Rozycki
    Mao Han
    Mark Wielaard
    Matthew Malcomson
    Mike Crowe
    Mike FABIAN
    Mike Frysinger
    Mike Gerow
    PanderMusubi
    Patsy Franklin
    Paul A. Clarke
    Paul Clarke
    Paul Eggert
    Paul Pluzhnikov
    Rafal Luzynski
    Richard Henderson
    Samuel Thibault
    Siddhesh Poyarekar
    Stan Shebs
    Stefan Liebler
    Szabolcs Nagy
    TAMUKI Shoichi
    Tobias Klauser
    Tulio Magno Quites Machado Filho
    Uros Bizjak
    Vincent Chen
    Vineet Gupta
    Wilco Dijkstra
    Wolfram Sang
    Yann Droneaud
    Zack Weinberg
    mansayk
    marxin
    
    
  • glibc-2.29.9000
    Open master branch for glibc 2.30 development
    
  • glibc-2.29
    56c86f5d · Tag 2.29 release ·
    The GNU C Library
    =================
    
    The GNU C Library version 2.29 is now available.
    
    The GNU C Library is used as *the* C library in the GNU system and
    in GNU/Linux systems, as well as many other systems that use Linux
    as the kernel.
    
    The GNU C Library is primarily designed to be a portable
    and high performance C library.  It follows all relevant
    standards including ISO C11 and POSIX.1-2008.  It is also
    internationalized and has one of the most complete
    internationalization interfaces known.
    
    The GNU C Library webpage is at http://www.gnu.org/software/libc/
    
    Packages for the 2.29 release may be downloaded from:
            http://ftpmirror.gnu.org/libc/
            http://ftp.gnu.org/gnu/libc/
    
    The mirror list is at http://www.gnu.org/order/ftp.html
    
    NEWS for version 2.29
    ====================
    
    * The getcpu wrapper function has been added, which returns the currently
      used CPU and NUMA node.  This function is Linux-specific.
    
    * A new convenience target has been added for distribution maintainers
      to build and install all locales as directories with files.  The new
      target is run by issuing the following command in your build tree:
      'make localedata/install-locale-files', with an optional DESTDIR
      to set the install root if you wish to install into a non-default
      configured location.
    
    * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
    
    * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
      for _GNU_SOURCE, to match BSD environments.
    
    * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
      indicates that it will abort the transaction prior to entering the kernel
      (PPC_FEATURE2_HTM_NOSC on hwcap2).  On older kernels the transaction is
      suspended, and this caused some undefined side-effects issues by aborting
      transactions manually.  Glibc avoided it by abort transactions manually on
      each syscall, but it lead to performance issues on newer kernels where the
      HTM state is saved and restore lazily (the state being saved even when the
      process actually does not use HTM).
    
    * The functions posix_spawn_file_actions_addchdir_np and
      posix_spawn_file_actions_addfchdir_np have been added, enabling
      posix_spawn and posix_spawnp to run the new process in a different
      directory.  These functions are GNU extensions.  The function
      posix_spawn_file_actions_addchdir_np is similar to the Solaris function
      of the same name.
    
    * The popen and system do not run atfork handlers anymore (BZ#17490).
      Although it is a possible POSIX violation, the POSIX rationale in
      pthread_atfork documentation regarding atfork handlers is to handle
      inconsistent mutex state after a fork call in a multi-threaded process.
      In both popen and system there is no direct access to user-defined mutexes.
    
    * Support for the C-SKY ABIV2 running on Linux has been added.  This port
      requires at least binutils-2.32, gcc-9.0, and linux-4.20.  Two ABIs are
      supported:
        - C-SKY ABIV2 soft-float little-endian
        - C-SKY ABIV2 hard-float little-endian
    
    * strftime's default formatting of a locale's alternative year (%Ey)
      has been changed to zero-pad the year to a minimum of two digits,
      like "%y".  This improves the display of Japanese era years during
      the first nine years of a new era, and is expected to be harmless
      for all other locales (only Japanese locales regularly have
      alternative year numbers less than 10).  Zero-padding can be
      overridden with the '_' or '-' flags (which are GNU extensions).
    
    * As a GNU extension, the '_' and '-' flags can now be applied to
      "%EY" to control how the year number is formatted; they have the
      same effect that they would on "%Ey".
    
    Deprecated and removed features, and other changes affecting compatibility:
    
    * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
      tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
    
    * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
      in <sys/procfs.h>, has been corrected to match the type actually used by
      the Linux kernel.  This affects the size and layout of that structure on
      MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
    
    * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
      struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
      defined in <sys/procfs.h>, has been corrected to match the type actually
      used by the Linux kernel.  This affects the size and layout of those
      structures.
    
    * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
      meant to scan a string and allocate space for it with malloc, is now
      restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
      defined.  This extension conflicts with C99's use of '%a' to scan a
      hexadecimal floating-point number, which is now available to programs
      compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
    
      POSIX.1-2008 includes the feature of allocating a buffer for string input
      with malloc, using the modifier letter 'm' instead.  Programs using
      '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
      '%ms', '%mS', or '%m[...]' respectively.  Programs that wish to use the
      C99 '%a' no longer need to avoid _GNU_SOURCE.
    
      GCC's -Wformat warnings can detect most uses of this extension, as long
      as all functions that call vscanf, vfscanf, or vsscanf are annotated with
      __attribute__ ((format (scanf, ...))).
    
    Changes to build and runtime requirements:
    
    * Python 3.4 or later is required to build the GNU C Library.
    
    * On most architectures, GCC 5 or later is required to build the GNU C
      Library.  (On powerpc64le, GCC 6.2 or later is still required, as before.)
    
      Older GCC versions and non-GNU compilers are still supported when
      compiling programs that use the GNU C Library.
    
    Security related changes:
    
      CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
      denial of service due to resource exhaustion when processing getaddrinfo
      calls with crafted host names.  Reported by Guido Vranken.
    
      CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
      32 bits of a 64-bit register with with non-zero upper 32 bit.  When it
      happened, accessing the 32-bit size_t value as the full 64-bit register
      in the assembly string/memory functions would cause a buffer overflow.
      Reported by H.J. Lu.
    
      CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
      addresses with arbitrary trailing characters, potentially leading to data
      or command injection issues in applications.
    
    Release Notes
    =============
    
    https://sourceware.org/glibc/wiki/Release/2.29
    
    Contributors
    ============
    
    This release was made possible by the contributions of many people.
    The maintainers are grateful to everyone who has contributed
    changes or bug reports.  These include:
    
    Adhemerval Zanella
    Albert ARIBAUD (3ADEV)
    Alexandra Hájková
    Andreas K. Hüttel
    Andreas Schwab
    Anton Youdkevitch
    Arjun Shankar
    Assaf Gordon
    Aurelien Jarno
    Carlos O'Donell
    Charles-Antoine Couret
    DJ Delorie
    Darius Rad
    David S. Miller
    Dmitry V. Levin
    Florian Weimer
    Fredrik Noring
    Gabriel F. T. Gomes
    H.J. Lu
    Ilya Leoshkevich
    Ilya Yu. Malakhov
    Istvan Kurucsai
    Jim Wilson
    Joseph Myers
    Justus Winter
    Kemi Wang
    Leonardo Sandoval
    Mao Han
    Martin Jansa
    Martin Kuchta
    Martin Sebor
    Mingli Yu
    Moritz Eckert
    PanderMusubi
    Paul Clarke
    Paul Eggert
    Paul Pluzhnikov
    Pochang Chen
    Rafael Avila de Espindola
    Rafael Ávila de Espíndola
    Rafal Luzynski
    Rajalakshmi Srinivasaraghavan
    Rogerio Alves
    Samuel Thibault
    Sergi Almacellas Abellana
    Siddhesh Poyarekar
    Stefan Liebler
    Steve Ellcey
    Szabolcs Nagy
    TAMUKI Shoichi
    Tobias Klauser
    Tulio Magno Quites Machado Filho
    Uroš Bizjak
    Wilco Dijkstra
    Zack Weinberg
    Zong Li
    
  • glibc-2.28.9000
    Open master branch for glibc 2.29 development
    
  • glibc-2.28
    The GNU C Library
    =================
    
    The GNU C Library version 2.28 is now available.
    
    The GNU C Library is used as *the* C library in the GNU system and
    in GNU/Linux systems, as well as many other systems that use Linux
    as the kernel.
    
    The GNU C Library is primarily designed to be a portable
    and high performance C library.  It follows all relevant
    standards including ISO C11 and POSIX.1-2008.  It is also
    internationalized and has one of the most complete
    internationalization interfaces known.
    
    The GNU C Library webpage is at http://www.gnu.org/software/libc/
    
    Packages for the 2.28 release may be downloaded from:
            http://ftpmirror.gnu.org/libc/
            http://ftp.gnu.org/gnu/libc/
    
    The mirror list is at http://www.gnu.org/order/ftp.html
    
    NEWS for version 2.28
    =====================
    
    Major new features:
    
    * The localization data for ISO 14651 is updated to match the 2016
      Edition 4 release of the standard, this matches data provided by
      Unicode 9.0.0.  This update introduces significant improvements to the
      collation of Unicode characters.  This release deviates slightly from
      the standard in that the collation element ordering for lowercase and
      uppercase LATIN script characters is adjusted to ensure that regular
      expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
      is not matched by [a-z].  With the update many locales have been
      updated to take advantage of the new collation information.  The new
      collation information has increased the size of the compiled locale
      archive or binary locales.
    
    * The GNU C Library can now be compiled with support for Intel CET, AKA
      Intel Control-flow Enforcement Technology.  When the library is built
      with --enable-cet, the resulting glibc is protected with indirect
      branch tracking (IBT) and shadow stack (SHSTK).  CET-enabled glibc is
      compatible with all existing executables and shared libraries.  This
      feature is currently supported on i386, x86_64 and x32 with GCC 8 and
      binutils 2.29 or later.  Note that CET-enabled glibc requires CPUs
      capable of multi-byte NOPs, like x86-64 processors as well as Intel
      Pentium Pro or newer.  NOTE: --enable-cet has been tested for i686,
      x86_64 and x32 on non-CET processors.  --enable-cet has been tested
      for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
      validated for i686.
    
    * The GNU C Library now has correct support for ABSOLUTE symbols
      (SHN_ABS-relative symbols).  Previously such ABSOLUTE symbols were
      relocated incorrectly or in some cases discarded.  The GNU linker can
      make use of the newer semantics, but it must communicate it to the
      dynamic loader by setting the ELF file's identification (EI_ABIVERSION
      field) to indicate such support is required.
    
    * Unicode 11.0.0 Support: Character encoding, character type info, and
      transliteration tables are all updated to Unicode 11.0.0, using
      generator scripts contributed by Mike FABIAN (Red Hat).
    
    * <math.h> functions that round their results to a narrower type are added
      from TS 18661-1:2014 and TS 18661-3:2015:
    
      - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
        fMxaddfNx functions.
    
      - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
        fMxsubfNx functions.
    
      - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
        fMxmulfNx functions.
    
      - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
        fMxdivfNx functions.
    
    * Two grammatical forms of month names are now supported for the following
      languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
      Scottish Gaelic, Upper Sorbian, and Walloon.  The following languages now
      support two grammatical forms in abbreviated month names: Catalan, Greek,
      and Kashubian.
    
    * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
      include the support for two grammatical forms of month names.
    
    * Building and running on GNU/Hurd systems now works without out-of-tree
      patches.
    
    * The renameat2 function has been added, a variant of the renameat function
      which has a flags argument.  If the flags are zero, the renameat2 function
      acts like renameat.  If the flag is not zero and there is no kernel
      support for renameat2, the function will fail with an errno value of
      EINVAL.  This is different from the existing gnulib function renameatu,
      which performs a plain rename operation in case of a RENAME_NOREPLACE
      flags and a non-existing destination (and therefore has a race condition
      that can clobber the destination inadvertently).
    
    * The statx function has been added, a variant of the fstatat64
      function with an additional flags argument.  If there is no direct
      kernel support for statx, glibc provides basic stat support based on
      the fstatat64 function.
    
    * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
      library if installed.  libidn2 version 2.0.5 or later is recommended.  If
      libidn2 is not available, internationalized domain names are not encoded
      or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
      getnameinfo.  (getaddrinfo calls with non-ASCII names and AI_IDN will fail
      with an encoding error.)  Flags which used to change the IDN encoding and
      decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
      NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
      deprecated.  They no longer have any effect.
    
    * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
      DT_AUXILIARY, and DT_FILTER has been expanded to support the full
      range of ELF gABI expressions including such constructs as
      '$ORIGIN$ORIGIN' (if valid).  For SUID/GUID applications the rules
      have been further restricted, and where in the past a dynamic string
      token sequence may have been interpreted as a literal string it will
      now cause a load failure.  These load failures were always considered
      unspecified behaviour from the perspective of the dynamic loader, and
      for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
      results in a load failure now.
    
    * Support for ISO C threads (ISO/IEC 9899:2011) has been added.  The
      implementation includes all the standard functions provided by
      <threads.h>:
    
      - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
        thrd_detach, thrd_exit, and thrd_join for thread management.
    
      - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
        mtx_destroy for mutual exclusion.
    
      - call_once for function call synchronization.
    
      - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
        cnd_wait for conditional variables.
    
      - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
    
      Application developers must link against libpthread to use ISO C threads.
    
    Deprecated and removed features, and other changes affecting compatibility:
    
    * The nonstandard header files <libio.h> and <_G_config.h> are no longer
      installed.  Software that was using either header should be updated to
      use standard <stdio.h> interfaces instead.
    
    * The stdio functions 'getc' and 'putc' are no longer defined as macros.
      This was never required by the C standard, and the macros just expanded
      to call alternative names for the same functions.  If you hoped getc and
      putc would provide performance improvements over fgetc and fputc, instead
      investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
      necessary, flockfile and funlockfile.
    
    * All stdio functions now treat end-of-file as a sticky condition.  If you
      read from a file until EOF, and then the file is enlarged by another
      process, you must call clearerr or another function with the same effect
      (e.g. fseek, rewind) before you can read the additional data.  This
      corrects a longstanding C99 conformance bug.  It is most likely to affect
      programs that use stdio to read interactive input from a terminal.
      (Bug #1190.)
    
    * The macros 'major', 'minor', and 'makedev' are now only available from
      the header <sys/sysmacros.h>; not from <sys/types.h> or various other
      headers that happen to include <sys/types.h>.  These macros are rarely
      used, not part of POSIX nor XSI, and their names frequently collide with
      user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
      further explanation.
    
      <sys/sysmacros.h> is a GNU extension.  Portable programs that require
      these macros should first include <sys/types.h>, and then include
      <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
    
    * The tilegx*-*-linux-gnu configurations are no longer supported.
    
    * The obsolete function ustat is no longer available to newly linked
      binaries; the headers <ustat.h> and <sys/ustat.h> have been removed.  This
      function has been deprecated in favor of fstatfs and statfs.
    
    * The obsolete function nfsservctl is no longer available to newly linked
      binaries.  This function was specific to systems using the Linux kernel
      and could not usefully be used with the GNU C Library on systems with
      version 3.1 or later of the Linux kernel.
    
    * The obsolete function name llseek is no longer available to newly linked
      binaries.  This function was specific to systems using the Linux kernel
      and was not declared in a header.  Programs should use the lseek64 name
      for this function instead.
    
    * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
      getaddrinfo and getnameinfo functions have been deprecated.  The behavior
      previously selected by them is now always enabled.
    
    * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
      the getaddrinfo and getnameinfo functions have been deprecated.  The STD3
      restriction (rejecting '_' in host names, among other things) has been
      removed, for increased compatibility with non-IDN name resolution.
    
    * The fcntl function now have a Long File Support variant named fcntl64.  It
      is added to fix some Linux Open File Description (OFD) locks usage on non
      LFS mode.  As for others *64 functions, fcntl64 semantics are analogous with
      fcntl and LFS support is handled transparently.  Also for Linux, the OFD
      locks act as a cancellation entrypoint.
    
    * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
      ecb_crypt, and des_setparity are no longer available to newly linked
      binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
      longer installed.  These functions encrypted and decrypted data with the
      DES block cipher, which is no longer considered secure.  Software that
      still uses these functions should switch to a modern cryptography library,
      such as libgcrypt.
    
    * Reflecting the removal of the encrypt and setkey functions above, the
      macro _XOPEN_CRYPT is no longer defined.  As a consequence, the crypt
      function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
      enabled.
    
    * The obsolete function fcrypt is no longer available to newly linked
      binaries.  It was just another name for the standard function crypt,
      and it has not appeared in any header file in many years.
    
    * We have tentative plans to hand off maintenance of the passphrase-hashing
      library, libcrypt, to a separate development project that will, we hope,
      keep up better with new passphrase-hashing algorithms.  We will continue
      to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
      'crypt_r' should not need to change at all; however, distributions will
      need to install <crypt.h> and libcrypt from a separate project.
    
      In this release, if the configure option --disable-crypt is used, glibc
      will not install <crypt.h> or libcrypt, making room for the separate
      project's versions of these files.  The plan is to make this the default
      behavior in a future release.
    
    Changes to build and runtime requirements:
    
      GNU make 4.0 or later is now required to build glibc.
    
    Security related changes:
    
      CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
      been fixed by removing the glibc-internal IDNA implementation and using
      the system-provided libidn2 library instead.  Originally reported by Hanno
      Böck and Christian Weisgerber.
    
      CVE-2017-18269: An SSE2-based memmove implementation for the i386
      architecture could corrupt memory.  Reported by Max Horn.
    
      CVE-2018-11236: Very long pathname arguments to realpath function could
      result in an integer overflow and buffer overflow.  Reported by Alexey
      Izbyshev.
    
      CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
      architecture could write beyond the target buffer, resulting in a buffer
      overflow.  Reported by Andreas Schwab.
    
    The following bugs are resolved with this release:
    
      [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
      [6889] manual: 'PWD' mentioned but not specified
      [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
        when __WORDSIZE != 64
      [13762] regex: re_search etc. should return -2 on memory exhaustion
      [13888] build: /tmp usage during testing
      [13932] math: dbl-64 pow unexpectedly slow for some inputs
      [14092] nptl: Support C11 threads
      [14095] localedata: Review / update collation data from Unicode / ISO
        14651
      [14508] libc: -Wformat warnings
      [14553] libc: Namespace pollution loff_t in sys/types.h
      [14890] libc: Make NT_PRFPREG canonical.
      [15105] libc: Extra PLT references with -Os
      [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
        conversion is given
      [16335] manual: Feature test macro documentation incomplete and out of
        date
      [16552] libc: Unify umount implementations in terms of umount2
      [17082] libc: htons et al.: statement-expressions prevent use on global
        scope with -O1 and higher
      [17343] libc: Signed integer overflow in /stdlib/random_r.c
      [17438] localedata: pt_BR: wrong d_fmt delimiter
      [17662] libc: please implement binding for the new renameat2 syscall
      [17721] libc: __restrict defined as /* Ignore */ even in c11
      [17979] libc: inconsistency between uchar.h and stdint.h
      [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
      [18023] libc: extend_alloca is broken (questionable pointer comparison,
        horrible machine code)
      [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
        last constant.
      [18471] libc: llseek should be a compat symbol
      [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
        symbols
      [18991] nss: nss_files skips large entry in database
      [19239] libc: Including stdlib.h ends up with macros major and minor being
        defined
      [19463] libc: linknamespace failures when compiled with -Os
      [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
      [19527] locale: Normalized charset name not recognized by setlocale
      [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
      [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
        fpscr.c'
      [19728] network: out of bounds stack read in libidn function
        idna_to_ascii_4i (CVE-2016-6261)
      [19729] network: out of bounds heap read on invalid utf-8 inputs in
        stringprep_utf8_nfkc_normalize (CVE-2016-6263)
      [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
        the base address
      [20079] libc: Add SHT_X86_64_UNWIND to elf.h
      [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
      [20419] dynamic-link: files with large allocated notes crash in
        open_verify
      [20530] libc: bswap_16 should use __builtin_bswap16() when available
      [20890] dynamic-link: ldconfig: fsync the files before atomic rename
      [20980] manual: CFLAGS environment variable replaces vital options
      [21163] regex: Assertion failure in pop_fail_stack when executing a
        malformed regexp (CVE-2015-8985)
      [21234] manual: use of CFLAGS makes glibc detect no optimization
      [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
      [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
      [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
      [21508] locale: intl/tst-gettext failure with latest msgfmt
      [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
      [21812] network: getifaddrs() returns entries with ifa_name == NULL
      [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
        dlopen
      [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
        AT_SECURE=1
      [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
      [22247] network: Integer overflow in the decode_digit function in
        puny_decode.c in libidn (CVE-2017-14062)
      [22342] nscd: NSCD not properly caching netgroup
      [22391] nptl: Signal function clear NPTL internal symbols inconsistently
      [22550] localedata: es_ES locale (and  other es_* locales):  collation
        should treat ñ  as a primary different character,  sync the collation
        for Spanish with CLDR
      [22638] dynamic-link: sparc: static binaries are broken if glibc is built
        by gcc configured with --enable-default-pie
      [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
      [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
        crossing 2GB threshold (CVE-2017-18269)
      [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
        es_BO
      [22735] time: Misleading typo in time.h source comment regarding
        CLOCKS_PER_SECOND
      [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
      [22761] libc: No trailing `%n' conversion specifier in FMT passed from
        `__assert_perror_fail ()' to `__assert_fail_base ()'
      [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
        dlopen failures
      [22786] libc: Stack buffer overflow in realpath() if input size is close
        to SSIZE_MAX (CVE-2018-11236)
      [22787] dynamic-link: _dl_check_caller returns false when libc is linked
        through an absolute DT_NEEDED path
      [22792] build: tcb-offsets.h dependency dropped
      [22797] libc: pkey_get() uses non-reserved name of argument
      [22807] libc: PTRACE_* constants missing for powerpc
      [22818] glob: posix/tst-glob_lstat_compat failure on alpha
      [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
      [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
      [22848] localedata: ca_ES: update date definitions from CLDR
      [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
      [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
      [22896] localedata: Update locale data for an_ES
      [22902] math: float128 test failures with GCC 8
      [22918] libc: multiple common of `__nss_shadow_database'
      [22919] libc: sparc32: backtrace yields infinite backtrace with
        makecontext
      [22926] libc: FTBFS on powerpcspe
      [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
        required
      [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
      [22947] libc: FAIL: misc/tst-preadvwritev2
      [22963] localedata: cs_CZ: Add alternative month names
      [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
      [22996] localedata: change LC_PAPER to en_US in es_BO locale
      [22998] dynamic-link: execstack tests are disabled when SELinux is
        disabled
      [23005] network: Crash in __res_context_send after memory allocation
        failure
      [23007] math: strtod cannot handle -nan
      [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
      [23036] regex: regex equivalence class regression
      [23037] libc: initialize msg_flags to zero for sendmmsg() calls
      [23069] libc: sigaction broken on riscv64-linux-gnu
      [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
      [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
        patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
      [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
        and libc build with -Os)
      [23140] localedata: More languages need two forms of month names
      [23145] libc: _init/_fini aren't marked as hidden
      [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
      [23171] math: C++ iseqsig for long double converts arguments to double
      [23178] nscd: sudo will fail when it is run in concurrent with commands
        that changes /etc/passwd
      [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
        (CVE-2018-11237)
      [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
      [23208] localedata: New locale - Lower Sorbian (dsb)
      [23233] regex: Memory leak in build_charclass_op function in file
        posix/regcomp.c
      [23236] stdio: Harden function pointers in _IO_str_fields
      [23250] nptl: Offset of __private_ss differs from GCC
      [23253] math: tgamma test suite failures on i686 with -march=x86-64
        -mtune=generic -mfpmath=sse
      [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
        AT_SECURE
      [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
      [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
        parser.c
      [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
      [23277] math: nan function should not have const attribute
      [23279] math: scanf and strtod wrong for some hex floating-point
      [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
        directed rounding
      [23290] localedata: IBM273 is not equivalent to ISO-8859-1
      [23303] build: undefined reference to symbol
        '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
      [23307] dynamic-link: Absolute symbols whose value is zero ignored in
        lookup
      [23313] stdio: libio vtables validation and standard file object
        interposition
      [23329] libc: The __libc_freeres infrastructure is not properly run across
        DSO boundaries.
      [23349] libc: Various glibc headers no longer compatible with
        <linux/time.h>
      [23351] malloc: Remove unused code related to heap dumps and malloc
        checking
      [23363] stdio: stdio-common/tst-printf.c has non-free license
      [23396] regex: Regex equivalence regression in single-byte locales
      [23422] localedata: oc_FR: More updates of locale data
      [23442] build: New warning with GCC 8
      [23448] libc: Out of bounds access in IBM-1390 converter
      [23456] libc: Wrong index_cpu_LZCNT
      [23458] build: tst-get-cpu-features-static isn't added to tests
      [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
        processors
      [23467] dynamic-link: x86/CET: A property note parser bug
    
    Release Notes
    =============
    
    https://sourceware.org/glibc/wiki/Release/2.28
    
    Contributors
    ============
    
    This release was made possible by the contributions of many people.
    The maintainers are grateful to everyone who has contributed
    changes or bug reports.  These include:
    
    Adhemerval Zanella
    Agustina Arzille
    Alan Modra
    Alexandre Oliva
    Amit Pawar
    Andreas Schwab
    Andrew Senkevich
    Andrew Waterman
    Aurelien Jarno
    Carlos O'Donell
    Chung-Lin Tang
    DJ Delorie
    Daniel Alvarez
    David Michael
    Dmitry V. Levin
    Dragan Stanojevic - Nevidljivi
    Florian Weimer
    Flávio Cruz
    Francois Goichon
    Gabriel F. T. Gomes
    H.J. Lu
    Herman ten Brugge
    Hongbo Zhang
    Igor Gnatenko
    Jesse Hathaway
    John David Anglin
    Joseph Myers
    Leonardo Sandoval
    Maciej W. Rozycki
    Mark Wielaard
    Martin Sebor
    Michael Wolf
    Mike FABIAN
    Patrick McGehearty
    Patsy Franklin
    Paul Pluzhnikov
    Quentin PAGÈS
    Rafal Luzynski
    Rajalakshmi Srinivasaraghavan
    Raymond Nicholson
    Rical Jasan
    Richard Braun
    Robert Buj
    Rogerio Alves
    Samuel Thibault
    Sean McKean
    Siddhesh Poyarekar
    Stefan Liebler
    Steve Ellcey
    Sylvain Lesage
    Szabolcs Nagy
    Thomas Schwinge
    Tulio Magno Quites Machado Filho
    Valery Timiriliyev
    Vincent Chen
    Wilco Dijkstra
    Zack Weinberg
    Zong Li
    
    
  • glibc-2.27.9000
    Open master branch for glibc 2.28 development