diff options
| author | Jan Kara <jack@suse.cz> | 2017-08-15 14:00:36 +0300 |
|---|---|---|
| committer | Paul Moore <paul@paul-moore.com> | 2017-08-15 22:58:17 +0300 |
| commit | d76036ab47eafa6ce52b69482e91ca3ba337d6d6 (patch) | |
| tree | 36e9cad8d69f7b801ef976a4f86a5276e7c59fe5 /init/calibrate.c | |
| parent | b0659ae5e30074ede1dc08f2c6d64f0c11d64e0f (diff) | |
| download | linux-d76036ab47eafa6ce52b69482e91ca3ba337d6d6.tar.xz | |
audit: Fix use after free in audit_remove_watch_rule()
audit_remove_watch_rule() drops watch's reference to parent but then
continues to work with it. That is not safe as parent can get freed once
we drop our reference. The following is a trivial reproducer:
mount -o loop image /mnt
touch /mnt/file
auditctl -w /mnt/file -p wax
umount /mnt
auditctl -D
<crash in fsnotify_destroy_mark()>
Grab our own reference in audit_remove_watch_rule() earlier to make sure
mark does not get freed under us.
CC: stable@vger.kernel.org
Reported-by: Tony Jones <tonyj@suse.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Tested-by: Tony Jones <tonyj@suse.de>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'init/calibrate.c')
0 files changed, 0 insertions, 0 deletions