Jan Kara b1da6a5187 fsnotify: Fix NULL ptr deref in fanotify_get_fsid() ... fanotify_get_fsid() is reading mark->connector->fsid under srcu. It can happen that it sees mark not fully initialized or mark that is already detached from the object list. In these cases mark->connector can be NULL leading to NULL ptr dereference. Fix the problem by being careful when reading mark->connector and check it for being NULL. Also use WRITE_ONCE when writing the mark just to prevent compiler from doing something stupid. Reported-by: syzbot+15927486a4f1bfcbaf91@syzkaller.appspotmail.com Fixes: 77115225ac ("fanotify: cache fsid in fsnotify_mark_connector") Signed-off-by: Jan Kara <jack@suse.cz>		2019-04-28 22:14:50 +02:00
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fanotify_user.c	fanotify: Allow copying of file handle to userspace	2019-03-19 09:29:07 +01:00
fanotify.c	fsnotify: Fix NULL ptr deref in fanotify_get_fsid()	2019-04-28 22:14:50 +02:00
fanotify.h	fanotify: Use interruptible wait when waiting for permission events	2019-02-18 12:41:16 +01:00
Kconfig	fanotify: Select EXPORTFS	2019-02-14 17:46:33 +01:00
Makefile	fanotify: fanotify_init syscall declaration	2010-07-28 09:58:55 -04:00