Jan Kara 194d435710 fsnotify: fix oops in fsnotify_clear_marks_by_group_flags() ... commit 8f2f3eb59d upstream. fsnotify_clear_marks_by_group_flags() can race with fsnotify_destroy_marks() so that when fsnotify_destroy_mark_locked() drops mark_mutex, a mark from the list iterated by fsnotify_clear_marks_by_group_flags() can be freed and thus the next entry pointer we have cached may become stale and we dereference free memory. Fix the problem by first moving marks to free to a special private list and then always free the first entry in the special list. This method is safe even when entries from the list can disappear once we drop the lock. Signed-off-by: Jan Kara <jack@suse.com> Reported-by: Ashish Sangwan <a.sangwan@samsung.com> Reviewed-by: Ashish Sangwan <a.sangwan@samsung.com> Cc: Lino Sanfilippo <LinoSanfilippo@gmx.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Jiri Slaby <jslaby@suse.cz>		2015-08-19 08:36:47 +02:00
..
dnotify	dnotify: replace dnotify_mark_mutex with mark mutex of dnotify_group	2013-07-09 10:33:20 -07:00
fanotify	fanotify: enable close-on-exec on events' fd when requested in fanotify_init()	2014-10-31 15:11:24 +01:00
inotify	inotify: fix race when adding a new watch	2013-07-09 10:33:20 -07:00
fdinfo.c	fs/notify: don't show f_handle if exportfs_encode_inode_fh failed	2014-10-13 15:41:29 +02:00
fdinfo.h	fs, notify: add procfs fdinfo helper	2012-12-17 17:15:28 -08:00
fsnotify.c	move d_rcu from overlapping d_child to overlapping d_alias	2015-01-29 15:45:16 +01:00
fsnotify.h	fsnotify: remove global fsnotify groups lists	2010-07-28 10:18:54 -04:00
group.c	fsnotify: make fasync generic for both inotify and fanotify	2012-12-11 13:44:36 -05:00
inode_mark.c	fsnotify: next_i is freed during fsnotify_unmount_inodes.	2015-01-14 11:43:05 +01:00
Kconfig	fanotify: allow fanotify to be built	2010-10-28 17:22:13 -04:00
Makefile	fs, notify: add procfs fdinfo helper	2012-12-17 17:15:28 -08:00
mark.c	fsnotify: fix oops in fsnotify_clear_marks_by_group_flags()	2015-08-19 08:36:47 +02:00
notification.c	Merge branch 'for-next' of git://git.infradead.org/users/eparis/notify	2012-12-20 20:11:52 -08:00
vfsmount_mark.c	hlist: drop the node parameter from iterators	2013-02-27 19:10:24 -08:00