1. 16 Dec, 2006 1 commit
    • Linus Torvalds's avatar
      Fix incorrect user space access locking in mincore() · 2f77d107
      Linus Torvalds authored
      Doug Chapman noticed that mincore() will doa "copy_to_user()" of the
      result while holding the mmap semaphore for reading, which is a big
      no-no.  While a recursive read-lock on a semaphore in the case of a page
      fault happens to work, we don't actually allow them due to deadlock
      schenarios with writers due to fairness issues.
      
      Doug and Marcel sent in a patch to fix it, but I decided to just rewrite
      the mess instead - not just fixing the locking problem, but making the
      code smaller and (imho) much easier to understand.
      
      Cc: Doug Chapman <dchapman@redhat.com>
      Cc: Marcel Holtmann <holtmann@redhat.com>
      Cc: Hugh Dickins <hugh@veritas.com>
      Cc: Andrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      2f77d107
  2. 15 Dec, 2006 12 commits
  3. 14 Dec, 2006 16 commits
  4. 13 Dec, 2006 11 commits