diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 81429e8266ab00acdb049b3bfea1b79fc774c5b8..7f3832cedfdf27672cd9dd431ef91791ef292b1f 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5491,8 +5491,7 @@ static struct mem_cgroup *mem_cgroup_alloc(void)
 		return ERR_PTR(error);
 
 	memcg->id.id = idr_alloc(&mem_cgroup_idr, NULL,
-				 1, MEM_CGROUP_ID_MAX,
-				 GFP_KERNEL);
+				 1, MEM_CGROUP_ID_MAX + 1, GFP_KERNEL);
 	if (memcg->id.id < 0) {
 		error = memcg->id.id;
 		goto fail;