1. 14 Mar, 2012 1 commit
  2. 13 Mar, 2012 1 commit
    • Matt Fleming's avatar
      tile: Use set_current_blocked() and block_sigmask() · ad092338
      Matt Fleming authored
      As described in e6fa16ab ("signal: sigprocmask() should do
      retarget_shared_pending()") the modification of current->blocked is
      incorrect as we need to check whether the signal we're about to block
      is pending in the shared queue.
      
      Also, use the new helper function introduced in commit 5e6292c0
      ("signal: add block_sigmask() for adding sigmask to current->blocked")
      which centralises the code for updating current->blocked after
      successfully delivering a signal and reduces the amount of duplicate
      code across architectures. In the past some architectures got this
      code wrong, so using this helper function should stop that from
      happening again.
      
      Cc: Arnd Bergmann <arnd@arndb.de>
      Acked-by: default avatarOleg Nesterov <oleg@redhat.com>
      Signed-off-by: default avatarMatt Fleming <matt.fleming@intel.com>
      Signed-off-by: default avatarChris Metcalf <cmetcalf@tilera.com>
      ad092338
  3. 12 Mar, 2012 3 commits
  4. 10 Mar, 2012 4 commits
    • Linus Torvalds's avatar
      Linux 3.3-rc7 · fde7d904
      Linus Torvalds authored
      fde7d904
    • Al Viro's avatar
      aio: fix the "too late munmap()" race · c7b28555
      Al Viro authored
      Current code has put_ioctx() called asynchronously from aio_fput_routine();
      that's done *after* we have killed the request that used to pin ioctx,
      so there's nothing to stop io_destroy() waiting in wait_for_all_aios()
      from progressing.  As the result, we can end up with async call of
      put_ioctx() being the last one and possibly happening during exit_mmap()
      or elf_core_dump(), neither of which expects stray munmap() being done
      to them...
      
      We do need to prevent _freeing_ ioctx until aio_fput_routine() is done
      with that, but that's all we care about - neither io_destroy() nor
      exit_aio() will progress past wait_for_all_aios() until aio_fput_routine()
      does really_put_req(), so the ioctx teardown won't be done until then
      and we don't care about the contents of ioctx past that point.
      
      Since actual freeing of these suckers is RCU-delayed, we don't need to
      bump ioctx refcount when request goes into list for async removal.
      All we need is rcu_read_lock held just over the ->ctx_lock-protected
      area in aio_fput_routine().
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      Reviewed-by: default avatarJeff Moyer <jmoyer@redhat.com>
      Acked-by: default avatarBenjamin LaHaise <bcrl@kvack.org>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      c7b28555
    • Al Viro's avatar
      aio: fix io_setup/io_destroy race · 86b62a2c
      Al Viro authored
      Have ioctx_alloc() return an extra reference, so that caller would drop it
      on success and not bother with re-grabbing it on failure exit.  The current
      code is obviously broken - io_destroy() from another thread that managed
      to guess the address io_setup() would've returned would free ioctx right
      under us; gets especially interesting if aio_context_t * we pass to
      io_setup() points to PROT_READ mapping, so put_user() fails and we end
      up doing io_destroy() on kioctx another thread has just got freed...
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      Acked-by: default avatarBenjamin LaHaise <bcrl@kvack.org>
      Reviewed-by: default avatarJeff Moyer <jmoyer@redhat.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      86b62a2c
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · 86e06008
      Linus Torvalds authored
      Pull btrfs updates from Chris Mason:
       "I have two additional and btrfs fixes in my for-linus branch.  One is
        a casting error that leads to memory corruption on i386 during scrub,
        and the other fixes a corner case in the backref walking code (also
        triggered by scrub)."
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
        Btrfs: fix casting error in scrub reada code
        btrfs: fix locking issues in find_parent_nodes()
      86e06008
  5. 09 Mar, 2012 14 commits
  6. 08 Mar, 2012 16 commits
  7. 07 Mar, 2012 1 commit