Eric Paris e08733446e inotify: race use after free/double free in inotify inode marks ... There is a race in the inotify add/rm watch code. A task can find and remove a mark which doesn't have all of it's references. This can result in a use after free/double free situation. Task A Task B ------------ ----------- inotify_new_watch() allocate a mark (refcnt == 1) add it to the idr inotify_rm_watch() inotify_remove_from_idr() fsnotify_put_mark() refcnt hits 0, free take reference because we are on idr [at this point it is a use after free] [time goes on] refcnt may hit 0 again, double free The fix is to take the reference BEFORE the object can be found in the idr. Signed-off-by: Eric Paris <eparis@redhat.com> Cc: <stable@kernel.org>		2010-05-14 11:52:57 -04:00
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inotify_fsnotify.c	inotify: only warn once for inotify problems	2010-01-15 14:49:23 -08:00
inotify_user.c	inotify: race use after free/double free in inotify inode marks	2010-05-14 11:52:57 -04:00
inotify.c
inotify.h
Kconfig	Inotify: undefined reference to `anon_inode_getfd'	2010-05-12 11:03:40 -04:00
Makefile