1 files changed, 3 insertions, 0 deletions

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 9b4993ee46b3..457d671029b8 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -231,6 +231,9 @@ page_cgroup_zoneinfo(struct page_cgroup *pc)
         int nid = page_cgroup_nid(pc);
         int zid = page_cgroup_zid(pc);
 
+        if (!mem)
+                return NULL;
+
         return mem_cgroup_zoneinfo(mem, nid, zid);
 }