Miklos Szeredi 2f5be98162 fsnotify: fix pinning group in fsnotify_prepare_user_wait() ... commit 9a31d7ad99 upstream. Blind increment of group's user_waits is not enough, we could be far enough in the group's destruction that it isn't taken into account (i.e. grabbing the mark ref afterwards doesn't guarantee that it was the ref coming from the _group_ that was grabbed). Instead we need to check (under lock) that the mark is still attached to the group after having obtained a ref to the mark. If not, skip it. Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Fixes: 9385a84d7e ("fsnotify: Pass fsnotify_iter_info into handle_event handler") Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2017-11-30 08:40:47 +00:00
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dnotify	fsnotify: make dnotify_fsnotify_ops const	2017-08-30 16:02:48 +02:00
fanotify	fanotify: fix fsnotify_prepare_user_wait() failure	2017-11-30 08:40:45 +00:00
inotify	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
fdinfo.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
fdinfo.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
fsnotify.c	fsnotify: pin both inode and vfsmount mark	2017-11-30 08:40:47 +00:00
fsnotify.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
group.c	fsnotify: Remove fsnotify_detach_group_marks()	2017-04-10 17:37:36 +02:00
Kconfig	rcu: Make SRCU optional by using CONFIG_SRCU	2015-01-06 11:04:29 -08:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mark.c	fsnotify: fix pinning group in fsnotify_prepare_user_wait()	2017-11-30 08:40:47 +00:00
notification.c	fsnotify: clean up spinlock assertions	2016-10-07 18:46:26 -07:00