linux-hardened/fs/notify
Jan Kara 0b1b86527d fanotify: fix possible false warning when freeing events
When freeing permission events by fsnotify_destroy_event(), the warning
WARN_ON(!list_empty(&event->list)); may falsely hit.

This is because although fanotify_get_response() saw event->response
set, there is nothing to make sure the current CPU also sees the removal
of the event from the list.  Add proper locking around the WARN_ON() to
avoid the false warning.

Link: http://lkml.kernel.org/r/1473797711-14111-7-git-send-email-jack@suse.cz
Reported-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Cc: Eric Paris <eparis@redhat.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-07 18:46:26 -07:00
..
dnotify fsnotify: get rid of fsnotify_destroy_mark_locked() 2015-09-04 16:54:41 -07:00
fanotify fanotify: use notification_lock instead of access_lock 2016-10-07 18:46:26 -07:00
inotify fsnotify: convert notification_mutex to a spinlock 2016-10-07 18:46:26 -07:00
fdinfo.c inotify: hide internal kernel bits from fdinfo 2015-11-05 19:34:48 -08:00
fdinfo.h fs: Convert show_fdinfo functions to void 2014-11-05 14:13:23 -05:00
fsnotify.c fsnotify: remove mark->free_list 2015-09-04 16:54:41 -07:00
fsnotify.h fsnotify: avoid spurious EMFILE errors from inotify_init() 2016-05-19 19:12:14 -07:00
group.c fsnotify: convert notification_mutex to a spinlock 2016-10-07 18:46:26 -07:00
inode_mark.c fs/notify/inode_mark.c: use list_next_entry in fsnotify_unmount_inodes 2016-01-14 16:00:49 -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
mark.c fsnotify: avoid spurious EMFILE errors from inotify_init() 2016-05-19 19:12:14 -07:00
notification.c fanotify: fix possible false warning when freeing events 2016-10-07 18:46:26 -07:00
vfsmount_mark.c fsnotify: remove mark->free_list 2015-09-04 16:54:41 -07:00