From: Dan Carpenter Date: Wed, 19 Jun 2013 10:05:29 +1000 Subject: fanotify: info leak in copy_event_to_user() Origin: http://www.ozlabs.org/~akpm/mmotm/broken-out/fanotify-info-leak-in-copy_event_to_user.patch The ->reserverd field isn't cleared so we leak one byte of stack information to userspace. Signed-off-by: Dan Carpenter Cc: Eric Paris Cc: Al Viro Signed-off-by: Andrew Morton --- fs/notify/fanotify/fanotify_user.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -121,6 +121,7 @@ static int fill_event_metadata(struct fs metadata->event_len = FAN_EVENT_METADATA_LEN; metadata->metadata_len = FAN_EVENT_METADATA_LEN; metadata->vers = FANOTIFY_METADATA_VERSION; + metadata->reserved = 0; metadata->mask = event->mask & FAN_ALL_OUTGOING_EVENTS; metadata->pid = pid_vnr(event->tgid); if (unlikely(event->mask & FAN_Q_OVERFLOW))