Merge tag 'slab-for-6.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab

Pull slab fix from Vlastimil Babka:

 - Fix memory leak of objects from remote NUMA node when bulk freeing to
   a cache with sheaves (Harry Yoo)

* tag 'slab-for-6.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
  mm/slub: fix memory leak in free_to_pcs_bulk()

Author: torvalds

mm/slub.c

@@ -6336,8 +6336,6 @@ static void free_to_pcs_bulk(struct kmem_cache *s, size_t size, void **p)
 
 		if (unlikely(!slab_free_hook(s, p[i], init, false))) {
 			p[i] = p[--size];
-			if (!size)
-				goto flush_remote;
 			continue;
 		}
 
@@ -6352,6 +6350,9 @@ static void free_to_pcs_bulk(struct kmem_cache *s, size_t size, void **p)
 		i++;
 	}
 
+	if (!size)
+		goto flush_remote;
+
 next_batch:
 	if (!local_trylock(&s->cpu_sheaves->lock))
 		goto fallback;
@@ -6406,6 +6407,9 @@ static void free_to_pcs_bulk(struct kmem_cache *s, size_t size, void **p)
 		goto next_batch;
 	}
 
+	if (remote_nr)
+		goto flush_remote;
+
 	return;
 
 no_empty: