diff --git a/mm/list_lru.c b/mm/list_lru.c
index b7ea86ae6d66..4a0a760a54aa 100644
--- a/mm/list_lru.c
+++ b/mm/list_lru.c
@@ -667,7 +667,12 @@ int __list_lru_init(struct list_lru *lru, bool memcg_aware, struct shrinker *shr
 	int i;
 
 #ifdef CONFIG_MEMCG
-	if (shrinker)
+	/*
+	 * If the shrinker fell back to being non-memcg-aware (e.g. with
+	 * cgroup.memory=nokmem), its id was never assigned and holds a
+	 * stale 0. Don't let set_shrinker_bit() act on it.
+	 */
+	if (shrinker && (shrinker->flags & SHRINKER_MEMCG_AWARE))
 		lru->shrinker_id = shrinker->id;
 	else
 		lru->shrinker_id = -1;