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slab fix for 6.18-rc6

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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()
This commit is contained in:
Linus Torvalds 2025-11-13 11:42:44 -08:00
commit 9b9e43704d
1 changed files with 6 additions and 2 deletions
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8
mm/slub.c
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@ -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: