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  3. 11 Dec, 2011 1 commit
  4. 22 Nov, 2011 1 commit
  5. 17 Jun, 2011 1 commit
  6. 24 May, 2011 1 commit
    • Dan Rosenberg's avatar
      net: convert %p usage to %pK · 71338aa7
      Dan Rosenberg authored
      The %pK format specifier is designed to hide exposed kernel pointers,
      specifically via /proc interfaces.  Exposing these pointers provides an
      easy target for kernel write vulnerabilities, since they reveal the
      locations of writable structures containing easily triggerable function
      pointers.  The behavior of %pK depends on the kptr_restrict sysctl.
      
      If kptr_restrict is set to 0, no deviation from the standard %p behavior
      occurs.  If kptr_restrict is set to 1, the default, if the current user
      (intended to be a reader via seq_printf(), etc.) does not have CAP_SYSLOG
      (currently in the LSM tree), kernel pointers using %pK are printed as 0's.
       If kptr_restrict is set to 2, kernel pointers using %pK are printed as
      0's regardless of privileges.  Replacing with 0's was chosen over the
      default "(null)", which cannot be parsed by userland %p, which expects
      "(nil)".
      
      The supporting code for kptr_restrict and %pK are currently in the -mm
      tree.  This patch converts users of %p in net/ to %pK.  Cases of printing
      pointers to the syslog are not covered, since this would eliminate useful
      information for postmortem debugging and the reading of the syslog is
      already optionally protected by the dmesg_restrict sysctl.
      Signed-off-by: default avatarDan Rosenberg <drosenberg@vsecurity.com>
      Cc: James Morris <jmorris@namei.org>
      Cc: Eric Dumazet <eric.dumazet@gmail.com>
      Cc: Thomas Graf <tgraf@infradead.org>
      Cc: Eugene Teo <eugeneteo@kernel.org>
      Cc: Kees Cook <kees.cook@canonical.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: David S. Miller <davem@davemloft.net>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Eric Paris <eparis@parisplace.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      71338aa7
  7. 22 Apr, 2011 1 commit
  8. 02 Mar, 2011 1 commit
  9. 26 Feb, 2011 1 commit
  10. 24 Feb, 2011 2 commits
  11. 23 Feb, 2011 1 commit
  12. 23 Sep, 2010 1 commit
  13. 18 May, 2010 1 commit
  14. 30 Mar, 2010 1 commit
    • Tejun Heo's avatar
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      Tejun Heo authored
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
      
      percpu.h is included by sched.h and module.h and thus ends up being
      included when building most .c files.  percpu.h includes slab.h which
      in turn includes gfp.h making everything defined by the two files
      universally available and complicating inclusion dependencies.
      
      percpu.h -> slab.h dependency is about to be removed.  Prepare for
      this change by updating users of gfp and slab facilities include those
      headers directly instead of assuming availability.  As this conversion
      needs to touch large number of source files, the following script is
      used as the basis of conversion.
      
        http://userweb.kernel.org/~tj/misc/slabh-sweep.py
      
      The script does the followings.
      
      * Scan files for gfp and slab usages and update includes such that
        only the necessary includes are there.  ie. if only gfp is used,
        gfp.h, if slab is used, slab.h.
      
      * When the script inserts a new include, it looks at the include
        blocks and try to put the new include such that its order conforms
        to its surrounding.  It's put in the include block which contains
        core kernel includes, in the same order that the rest are ordered -
        alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
        doesn't seem to be any matching order.
      
      * If the script can't find a place to put a new include (mostly
        because the file doesn't have fitting include block), it prints out
        an error message indicating which .h file needs to be added to the
        file.
      
      The conversion was done in the following steps.
      
      1. The initial automatic conversion of all .c files updated slightly
         over 4000 files, deleting around 700 includes and adding ~480 gfp.h
         and ~3000 slab.h inclusions.  The script emitted errors for ~400
         files.
      
      2. Each error was manually checked.  Some didn't need the inclusion,
         some needed manual addition while adding it to implementation .h or
         embedding .c file was more appropriate for others.  This step added
         inclusions to around 150 files.
      
      3. The script was run again and the output was compared to the edits
         from #2 to make sure no file was left behind.
      
      4. Several build tests were done and a couple of problems were fixed.
         e.g. lib/decompress_*.c used malloc/free() wrappers around slab
         APIs requiring slab.h to be added manually.
      
      5. The script was run on all .h files but without automatically
         editing them as sprinkling gfp.h and slab.h inclusions around .h
         files could easily lead to inclusion dependency hell.  Most gfp.h
         inclusion directives were ignored as stuff from gfp.h was usually
         wildly available and often used in preprocessor macros.  Each
         slab.h inclusion directive was examined and added manually as
         necessary.
      
      6. percpu.h was updated not to include slab.h.
      
      7. Build test were done on the following configurations and failures
         were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
         distributed build env didn't work with gcov compiles) and a few
         more options had to be turned off depending on archs to make things
         build (like ipr on powerpc/64 which failed due to missing writeq).
      
         * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
         * powerpc and powerpc64 SMP allmodconfig
         * sparc and sparc64 SMP allmodconfig
         * ia64 SMP allmodconfig
         * s390 SMP allmodconfig
         * alpha SMP allmodconfig
         * um on x86_64 SMP allmodconfig
      
      8. percpu.h modifications were reverted so that it could be applied as
         a separate patch and serve as bisection point.
      
      Given the fact that I had only a couple of failures from tests on step
      6, I'm fairly confident about the coverage of this conversion patch.
      If there is a breakage, it's likely to be something in one of the arch
      headers which should be easily discoverable easily on most builds of
      the specific arch.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Guess-its-ok-by: default avatarChristoph Lameter <cl@linux-foundation.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
      5a0e3ad6
  15. 24 Mar, 2010 1 commit
  16. 23 Feb, 2010 2 commits
  17. 22 Feb, 2010 1 commit
  18. 19 Feb, 2010 3 commits
  19. 17 Feb, 2010 1 commit
    • David S. Miller's avatar
      xfrm: Revert false event eliding commits. · 069c474e
      David S. Miller authored
      As reported by Alexey Dobriyan:
      
      --------------------
      setkey now takes several seconds to run this simple script
      and it spits "recv: Resource temporarily unavailable" messages.
      
      #!/usr/sbin/setkey -f
      flush;
      spdflush;
      
      add A B ipcomp 44 -m tunnel -C deflate;
      add B A ipcomp 45 -m tunnel -C deflate;
      
      spdadd A B any -P in ipsec
              ipcomp/tunnel/192.168.1.2-192.168.1.3/use;
      spdadd B A any -P out ipsec
              ipcomp/tunnel/192.168.1.3-192.168.1.2/use;
      --------------------
      
      Obviously applications want the events even when the table
      is empty.  So we cannot make this behavioral change.
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      069c474e
  20. 16 Feb, 2010 2 commits
    • jamal's avatar
      xfrm: Flushing empty SPD generates false events · 0dca3a84
      jamal authored
      Observed similar behavior on SPD as previouly seen on SAD flushing..
      This fixes it.
      
      cheers,
      jamal
      commit 428b20432dc31bc2e01a94cd451cf5a2c00d2bf4
      Author: Jamal Hadi Salim <hadi@cyberus.ca>
      Date:   Thu Feb 11 05:49:38 2010 -0500
      
          xfrm: Flushing empty SPD generates false events
      
          To see the effect make sure you have an empty SPD.
          On window1 "ip xfrm mon" and on window2 issue "ip xfrm policy flush"
          You get prompt back in window1 and you see the flush event on window2.
          With this fix, you still get prompt on window1 but no event on window2.
      Signed-off-by: default avatarJamal Hadi Salim <hadi@cyberus.ca>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0dca3a84
    • jamal's avatar
      xfrm: Flushing empty SAD generates false events · 19f4c713
      jamal authored
      To see the effect make sure you have an empty SAD.
      -On window1 "ip xfrm mon"
      -on window2 issue "ip xfrm state flush"
      You get prompt back in window1
      and you see the flush event on window2.
      With this fix, you still get prompt on window1 but no
      event on window2.
      
      I was tempted to return -ESRCH on window1 (which would
      show "RTNETLINK answers: No such process") but didnt want
      to change current behavior.
      
      cheers,
      jamal
      commit 5f3dd4a772326166e1bcf54acc2391df00dc7ab5
      Author: Jamal Hadi Salim <hadi@cyberus.ca>
      Date:   Thu Feb 11 04:41:36 2010 -0500
      
          xfrm: Flushing empty SAD generates false events
      
          To see the effect make sure you have an empty SAD.
          On window1 "ip xfrm mon" and on window2 issue "ip xfrm state flush"
          You get prompt back in window1 and you see the flush event on window2.
          With this fix, you still get prompt on window1 but no event on window2.
      Signed-off-by: default avatarJamal Hadi Salim <hadi@cyberus.ca>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      19f4c713
  21. 10 Feb, 2010 1 commit
  22. 04 Feb, 2010 1 commit
    • Alexey Dobriyan's avatar
      af_key: fix netns ops ordering on module load/unload · 180211b8
      Alexey Dobriyan authored
      1. After sock_register() returns, it's possible to create sockets,
         even if module still not initialized fully (blame generic module code
         for that!)
      2. Consequently, pfkey_create() can be called with pfkey_net_id still not
         initialized which will BUG_ON in net_generic():
      	kernel BUG at include/net/netns/generic.h:43!
      3. During netns shutdown, netns ops should be unregistered after
         key manager unregistered because key manager calls can be triggered
         from xfrm_user module:
      
         	general protection fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
      	pfkey_broadcast+0x111/0x210 [af_key]
      	pfkey_send_notify+0x16a/0x300 [af_key]
      	km_state_notify+0x41/0x70
      	xfrm_flush_sa+0x75/0x90 [xfrm_user]
      4. Unregister netns ops after socket ops just in case and for symmetry.
      
      Reported by Luca Tettamanti.
      Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
      Tested-by: default avatarLuca Tettamanti <kronos.it@gmail.com>
      Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      180211b8
  23. 02 Feb, 2010 1 commit
  24. 18 Jan, 2010 1 commit
  25. 11 Dec, 2009 1 commit
  26. 02 Dec, 2009 1 commit
  27. 18 Nov, 2009 1 commit
  28. 06 Nov, 2009 1 commit
  29. 12 Oct, 2009 1 commit
    • Neil Horman's avatar
      net: Generalize socket rx gap / receive queue overflow cmsg · 3b885787
      Neil Horman authored
      Create a new socket level option to report number of queue overflows
      
      Recently I augmented the AF_PACKET protocol to report the number of frames lost
      on the socket receive queue between any two enqueued frames.  This value was
      exported via a SOL_PACKET level cmsg.  AFter I completed that work it was
      requested that this feature be generalized so that any datagram oriented socket
      could make use of this option.  As such I've created this patch, It creates a
      new SOL_SOCKET level option called SO_RXQ_OVFL, which when enabled exports a
      SOL_SOCKET level cmsg that reports the nubmer of times the sk_receive_queue
      overflowed between any two given frames.  It also augments the AF_PACKET
      protocol to take advantage of this new feature (as it previously did not touch
      sk->sk_drops, which this patch uses to record the overflow count).  Tested
      successfully by me.
      
      Notes:
      
      1) Unlike my previous patch, this patch simply records the sk_drops value, which
      is not a number of drops between packets, but rather a total number of drops.
      Deltas must be computed in user space.
      
      2) While this patch currently works with datagram oriented protocols, it will
      also be accepted by non-datagram oriented protocols. I'm not sure if thats
      agreeable to everyone, but my argument in favor of doing so is that, for those
      protocols which aren't applicable to this option, sk_drops will always be zero,
      and reporting no drops on a receive queue that isn't used for those
      non-participating protocols seems reasonable to me.  This also saves us having
      to code in a per-protocol opt in mechanism.
      
      3) This applies cleanly to net-next assuming that commit
      97775007 (my af packet cmsg patch) is reverted
      Signed-off-by: default avatarNeil Horman <nhorman@tuxdriver.com>
      Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      3b885787
  30. 07 Oct, 2009 1 commit
  31. 02 Sep, 2009 2 commits
  32. 18 Jun, 2009 1 commit
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  34. 26 Jan, 2009 1 commit