diff --git a/mm/slub.c b/mm/slub.c
index 64fdd1d122b9..cbd1f4721652 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1935,7 +1935,11 @@ static inline void mark_objexts_empty(struct slabobj_ext *obj_exts)
 	if (slab_exts) {
 		unsigned int offs = obj_to_index(obj_exts_slab->slab_cache,
 						 obj_exts_slab, obj_exts);
-		/* codetag should be NULL */
+
+		if (unlikely(is_codetag_empty(&slab_exts[offs].ref)))
+			return;
+
+		/* codetag should be NULL here */
 		WARN_ON(slab_exts[offs].ref.ct);
 		set_codetag_empty(&slab_exts[offs].ref);
 	}