Jan Kara 14e69b5a72 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2015-08-16 20:52:09 -07:00
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dnotify	fsnotify: unify inode and mount marks handling	2014-12-13 12:42:53 -08:00
fanotify	fanotify: fix event filtering with FAN_ONDIR set	2015-03-12 18:46:08 -07:00
inotify	fsnotify: unify inode and mount marks handling	2014-12-13 12:42:53 -08:00
Kconfig	rcu: Make SRCU optional by using CONFIG_SRCU	2015-01-06 11:04:29 -08:00
Makefile	fs, notify: add procfs fdinfo helper	2012-12-17 17:15:28 -08:00
fdinfo.c	fsnotify: unify inode and mount marks handling	2014-12-13 12:42:53 -08:00
fdinfo.h	fs: Convert show_fdinfo functions to void	2014-11-05 14:13:23 -05:00
fsnotify.c	fsnotify: unify inode and mount marks handling	2014-12-13 12:42:53 -08:00
fsnotify.h	fsnotify: unify inode and mount marks handling	2014-12-13 12:42:53 -08:00
group.c	fs/notify/group.c: make fsnotify_final_destroy_group() static	2014-10-09 22:25:45 -04:00
inode_mark.c	fsnotify: unify inode and mount marks handling	2014-12-13 12:42:53 -08:00
mark.c	fsnotify: fix oops in fsnotify_clear_marks_by_group_flags()	2015-08-16 20:52:09 -07:00
notification.c	fanotify: fix double free of pending permission events	2014-08-06 18:01:12 -07:00
vfsmount_mark.c	fsnotify: unify inode and mount marks handling	2014-12-13 12:42:53 -08:00