diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index a2c7bcb0e6ebf10672f91b8117aef69d08b41ade..1f14a430c65691b5135c0752a5c9c151cbd2f0f9 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5415,8 +5415,12 @@ static int mem_cgroup_oom_notify_cb(struct mem_cgroup *memcg)
 {
 	struct mem_cgroup_eventfd_list *ev;
 
+	spin_lock(&memcg_oom_lock);
+
 	list_for_each_entry(ev, &memcg->oom_notify, list)
 		eventfd_signal(ev->eventfd, 1);
+
+	spin_unlock(&memcg_oom_lock);
 	return 0;
 }