fsnotify: Fix detection whether overflow event is queued

Currently we didn't initialize event's list head when we removed it from
the event list. Thus a detection whether overflow event is already
queued wasn't working. Fix it by always initializing the list head when
deleting event from a list.

Signed-off-by: Jan Kara <jack@suse.cz>

diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index 18b3c4427dcac0f2c9125581cc171be3f1eb3a9f..6bec2f4918f998c912517b9ed522b30af694357d 100644 (file)
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -132,7 +132,11 @@ struct fsnotify_event *fsnotify_remove_notify_event(struct fsnotify_group *group
 
        event = list_first_entry(&group->notification_list,
                                 struct fsnotify_event, list);
-       list_del(&event->list);
+       /*
+        * We need to init list head for the case of overflow event so that
+        * check in fsnotify_add_notify_events() works
+        */
+       list_del_init(&event->list);
        group->q_len--;
 
        return event;