1 files changed, 1 insertions, 0 deletions

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index f3803462a7e6..0093bc36c5fc 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2225,6 +2225,7 @@ void mem_cgroup_update_page_stat(struct page *page,
         if (mem_cgroup_disabled())
                 return;
 
+        VM_BUG_ON(!rcu_read_lock_held());
         memcg = pc->mem_cgroup;
         if (unlikely(!memcg || !PageCgroupUsed(pc)))
                 return;