diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2009-06-17 00:27:10 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-16 15:36:17 -0700 |
| commit | 8eeee4e2f04fc551f50c9d9847da2d73d7d33728 (patch) | |
| tree | c5b7a2c9b912369c82506f8363b8eb10538f5d8e /mm/madvise.c | |
| parent | f83b1e616f2f68b56b09b2f5116591981fee0c1c (diff) | |
send_sigio_to_task: sanitize the usage of fown->signum
send_sigio_to_task() reads fown->signum several times, we can race with
F_SETSIG which changes ->signum lockless. In theory, this can fool
security checks or we can call group_send_sig_info() with the wrong
->si_signo which does not match "int sig".
Change the code to cache ->signum.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/madvise.c')
0 files changed, 0 insertions, 0 deletions