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  1. 24 Oct, 2011 4 commits
  2. 23 Oct, 2011 3 commits
  3. 21 Oct, 2011 5 commits
    • Domenico Andreoli's avatar
      ARM: S3C24XX: Fix s3c24xx build errors if !CONFIG_PM · fb630b9f
      Domenico Andreoli authored
      v2:
      - register_syscore_ops(&s3c24xx_irq_syscore_ops) does not need to be
        conditionally compiled out, it is already optimized out on !CONFIG_PM
      - fix also s3c2412 and s3c2416 affected by the same build issue
      
      v1:
      s3c2440.c fails to build if !CONFIG_PM because in such case
      s3c2410_pm_syscore_ops is not defined. Same error should happen also
      in s3c2410.c and s3c2442.c
      Signed-off-by: 's avatarDomenico Andreoli <cavokz@gmail.com>
      Signed-off-by: 's avatarKukjin Kim <kgene.kim@samsung.com>
      fb630b9f
    • Linus Torvalds's avatar
      Merge git://github.com/herbertx/crypto · 2efd7c0f
      Linus Torvalds authored
      * git://github.com/herbertx/crypto:
        crypto: ghash - Avoid null pointer dereference if no key is set
      2efd7c0f
    • Linus Torvalds's avatar
      Merge branch 'fix/hda' of git://github.com/tiwai/sound · 62ddc004
      Linus Torvalds authored
      * 'fix/hda' of git://github.com/tiwai/sound:
        ALSA: HDA: conexant support for Lenovo T520/W520
        ALSA: hda - Add position_fix quirk for Dell Inspiron 1010
      62ddc004
    • Nick Bowler's avatar
      crypto: ghash - Avoid null pointer dereference if no key is set · 7ed47b7d
      Nick Bowler authored
      The ghash_update function passes a pointer to gf128mul_4k_lle which will
      be NULL if ghash_setkey is not called or if the most recent call to
      ghash_setkey failed to allocate memory.  This causes an oops.  Fix this
      up by returning an error code in the null case.
      
      This is trivially triggered from unprivileged userspace through the
      AF_ALG interface by simply writing to the socket without setting a key.
      
      The ghash_final function has a similar issue, but triggering it requires
      a memory allocation failure in ghash_setkey _after_ at least one
      successful call to ghash_update.
      
        BUG: unable to handle kernel NULL pointer dereference at 00000670
        IP: [<d88c92d4>] gf128mul_4k_lle+0x23/0x60 [gf128mul]
        *pde = 00000000
        Oops: 0000 [#1] PREEMPT SMP
        Modules linked in: ghash_generic gf128mul algif_hash af_alg nfs lockd nfs_acl sunrpc bridge ipv6 stp llc
      
        Pid: 1502, comm: hashatron Tainted: G        W   3.1.0-rc9-00085-ge9308cfd #32 Bochs Bochs
        EIP: 0060:[<d88c92d4>] EFLAGS: 00000202 CPU: 0
        EIP is at gf128mul_4k_lle+0x23/0x60 [gf128mul]
        EAX: d69db1f0 EBX: d6b8ddac ECX: 00000004 EDX: 00000000
        ESI: 00000670 EDI: d6b8ddac EBP: d6b8ddc8 ESP: d6b8dda4
         DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
        Process hashatron (pid: 1502, ti=d6b8c000 task=d6810000 task.ti=d6b8c000)
        Stack:
         00000000 d69db1f0 00000163 00000000 d6b8ddc8 c101a520 d69db1f0 d52aa000
         00000ff0 d6b8dde8 d88d310f d6b8a3f8 d52aa000 00001000 d88d502c d6b8ddfc
         00001000 d6b8ddf4 c11676ed d69db1e8 d6b8de24 c11679ad d52aa000 00000000
        Call Trace:
         [<c101a520>] ? kmap_atomic_prot+0x37/0xa6
         [<d88d310f>] ghash_update+0x85/0xbe [ghash_generic]
         [<c11676ed>] crypto_shash_update+0x18/0x1b
         [<c11679ad>] shash_ahash_update+0x22/0x36
         [<c11679cc>] shash_async_update+0xb/0xd
         [<d88ce0ba>] hash_sendpage+0xba/0xf2 [algif_hash]
         [<c121b24c>] kernel_sendpage+0x39/0x4e
         [<d88ce000>] ? 0xd88cdfff
         [<c121b298>] sock_sendpage+0x37/0x3e
         [<c121b261>] ? kernel_sendpage+0x4e/0x4e
         [<c10b4dbc>] pipe_to_sendpage+0x56/0x61
         [<c10b4e1f>] splice_from_pipe_feed+0x58/0xcd
         [<c10b4d66>] ? splice_from_pipe_begin+0x10/0x10
         [<c10b51f5>] __splice_from_pipe+0x36/0x55
         [<c10b4d66>] ? splice_from_pipe_begin+0x10/0x10
         [<c10b6383>] splice_from_pipe+0x51/0x64
         [<c10b63c2>] ? default_file_splice_write+0x2c/0x2c
         [<c10b63d5>] generic_splice_sendpage+0x13/0x15
         [<c10b4d66>] ? splice_from_pipe_begin+0x10/0x10
         [<c10b527f>] do_splice_from+0x5d/0x67
         [<c10b6865>] sys_splice+0x2bf/0x363
         [<c129373b>] ? sysenter_exit+0xf/0x16
         [<c104dc1e>] ? trace_hardirqs_on_caller+0x10e/0x13f
         [<c129370c>] sysenter_do_call+0x12/0x32
        Code: 83 c4 0c 5b 5e 5f c9 c3 55 b9 04 00 00 00 89 e5 57 8d 7d e4 56 53 8d 5d e4 83 ec 18 89 45 e0 89 55 dc 0f b6 70 0f c1 e6 04 01 d6 <f3> a5 be 0f 00 00 00 4e 89 d8 e8 48 ff ff ff 8b 45 e0 89 da 0f
        EIP: [<d88c92d4>] gf128mul_4k_lle+0x23/0x60 [gf128mul] SS:ESP 0068:d6b8dda4
        CR2: 0000000000000670
        ---[ end trace 4eaa2a86a8e2da24 ]---
        note: hashatron[1502] exited with preempt_count 1
        BUG: scheduling while atomic: hashatron/1502/0x10000002
        INFO: lockdep is turned off.
        [...]
      Signed-off-by: 's avatarNick Bowler <nbowler@elliptictech.com>
      Cc: stable@kernel.org [2.6.37+]
      Signed-off-by: 's avatarHerbert Xu <herbert@gondor.apana.org.au>
      7ed47b7d
    • Marek Szyprowski's avatar
      ARM: S5P: fix offset calculation on gpio-interrupt · 1052cff3
      Marek Szyprowski authored
      Offsets of the irq controller registers were calculated
      correctly only for first GPIO bank. This patch fixes
      calculation of the register offsets for all GPIO banks.
      Reported-by: 's avatarSylwester Nawrocki <s.nawrocki@samsung.com>
      Signed-off-by: 's avatarMarek Szyprowski <m.szyprowski@samsung.com>
      Signed-off-by: 's avatarKyungmin Park <kyungmin.park@samsung.com>
      Signed-off-by: 's avatarKukjin Kim <kgene.kim@samsung.com>
      1052cff3
  4. 20 Oct, 2011 4 commits
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc · fd11e153
      Linus Torvalds authored
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
        sparc: Add alignment flag to PCI expansion resources
        sparc: Avoid calling sigprocmask()
        sparc: Use set_current_blocked()
        sparc32,leon: SRMMU MMU Table probe fix
      fd11e153
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 505f48b5
      Linus Torvalds authored
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
        fib_rules: fix unresolved_rules counting
        r8169: fix wrong eee setting for rlt8111evl
        r8169: fix driver shutdown WoL regression.
        ehea: Change maintainer to me
        pptp: pptp_rcv_core() misses pskb_may_pull() call
        tproxy: copy transparent flag when creating a time wait
        pptp: fix skb leak in pptp_xmit()
        bonding: use local function pointer of bond->recv_probe in bond_handle_frame
        smsc911x: Add support for SMSC LAN89218
        tg3: negate USE_PHYLIB flag check
        netconsole: enable netconsole can make net_device refcnt incorrent
        bluetooth: Properly clone LSM attributes to newly created child connections
        l2tp: fix a potential skb leak in l2tp_xmit_skb()
        bridge: fix hang on removal of bridge via netlink
        x25: Prevent skb overreads when checking call user data
        x25: Handle undersized/fragmented skbs
        x25: Validate incoming call user data lengths
        udplite: fast-path computation of checksum coverage
        IPVS netns shutdown/startup dead-lock
        netfilter: nf_conntrack: fix event flooding in GRE protocol tracker
      505f48b5
    • Jean Delvare's avatar
      hwmon: (w83627ehf) Fix negative 8-bit temperature values · 133d324d
      Jean Delvare authored
      Since 8-bit temperature values are now handled in 16-bit struct
      members, values have to be cast to s8 for negative temperatures to be
      properly handled. This is broken since kernel version 2.6.39
      (commit bce26c58.)
      Signed-off-by: 's avatarJean Delvare <khali@linux-fr.org>
      Cc: Guenter Roeck <guenter.roeck@ericsson.com>
      Cc: stable@kernel.org	# 2.6.39+
      Signed-off-by: 's avatarGuenter Roeck <guenter.roeck@ericsson.com>
      133d324d
    • Hugh Dickins's avatar
      mm: fix race between mremap and removing migration entry · 486cf46f
      Hugh Dickins authored
      I don't usually pay much attention to the stale "? " addresses in
      stack backtraces, but this lucky report from Pawel Sikora hints that
      mremap's move_ptes() has inadequate locking against page migration.
      
       3.0 BUG_ON(!PageLocked(p)) in migration_entry_to_page():
       kernel BUG at include/linux/swapops.h:105!
       RIP: 0010:[<ffffffff81127b76>]  [<ffffffff81127b76>]
                             migration_entry_wait+0x156/0x160
        [<ffffffff811016a1>] handle_pte_fault+0xae1/0xaf0
        [<ffffffff810feee2>] ? __pte_alloc+0x42/0x120
        [<ffffffff8112c26b>] ? do_huge_pmd_anonymous_page+0xab/0x310
        [<ffffffff81102a31>] handle_mm_fault+0x181/0x310
        [<ffffffff81106097>] ? vma_adjust+0x537/0x570
        [<ffffffff81424bed>] do_page_fault+0x11d/0x4e0
        [<ffffffff81109a05>] ? do_mremap+0x2d5/0x570
        [<ffffffff81421d5f>] page_fault+0x1f/0x30
      
      mremap's down_write of mmap_sem, together with i_mmap_mutex or lock,
      and pagetable locks, were good enough before page migration (with its
      requirement that every migration entry be found) came in, and enough
      while migration always held mmap_sem; but not enough nowadays, when
      there's memory hotremove and compaction.
      
      The danger is that move_ptes() lets a migration entry dodge around
      behind remove_migration_pte()'s back, so it's in the old location when
      looking at the new, then in the new location when looking at the old.
      
      Either mremap's move_ptes() must additionally take anon_vma lock(), or
      migration's remove_migration_pte() must stop peeking for is_swap_entry()
      before it takes pagetable lock.
      
      Consensus chooses the latter: we prefer to add overhead to migration
      than to mremapping, which gets used by JVMs and by exec stack setup.
      Reported-and-tested-by: 's avatarPaweł Sikora <pluto@agmk.net>
      Signed-off-by: 's avatarHugh Dickins <hughd@google.com>
      Acked-by: 's avatarAndrea Arcangeli <aarcange@redhat.com>
      Acked-by: 's avatarMel Gorman <mgorman@suse.de>
      Cc: stable@vger.kernel.org
      Signed-off-by: 's avatarLinus Torvalds <torvalds@linux-foundation.org>
      486cf46f
  5. 19 Oct, 2011 23 commits
  6. 18 Oct, 2011 1 commit
    • Peter Zijlstra's avatar
      cputimer: Cure lock inversion · bcd5cff7
      Peter Zijlstra authored
      There's a lock inversion between the cputimer->lock and rq->lock;
      notably the two callchains involved are:
      
       update_rlimit_cpu()
         sighand->siglock
         set_process_cpu_timer()
           cpu_timer_sample_group()
             thread_group_cputimer()
               cputimer->lock
               thread_group_cputime()
                 task_sched_runtime()
                   ->pi_lock
                   rq->lock
      
       scheduler_tick()
         rq->lock
         task_tick_fair()
           update_curr()
             account_group_exec()
               cputimer->lock
      
      Where the first one is enabling a CLOCK_PROCESS_CPUTIME_ID timer, and
      the second one is keeping up-to-date.
      
      This problem was introduced by e8abccb7 ("posix-cpu-timers: Cure
      SMP accounting oddities").
      
      Cure the problem by removing the cputimer->lock and rq->lock nesting,
      this leaves concurrent enablers doing duplicate work, but the time
      wasted should be on the same order otherwise wasted spinning on the
      lock and the greater-than assignment filter should ensure we preserve
      monotonicity.
      Reported-by: 's avatarDave Jones <davej@redhat.com>
      Reported-by: 's avatarSimon Kirby <sim@hostway.ca>
      Signed-off-by: 's avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: stable@kernel.org
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Link: http://lkml.kernel.org/r/1318928713.21167.4.camel@twinsSigned-off-by: 's avatarThomas Gleixner <tglx@linutronix.de>
      bcd5cff7