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slab fixes for 6.11-rc2

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Merge tag 'slab-fixes-for-6.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab

Pull slab fix from Vlastimil Babka:
 "Since v6.8 we've had a subtle breakage in SLUB with KFENCE enabled,
  that can cause a crash. It hasn't been found earlier due to quite
  specific conditions necessary (OOM during kmem_cache_alloc_bulk())"

* tag 'slab-fixes-for-6.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
  mm, slub: do not call do_slab_free for kfence object
This commit is contained in:
Linus Torvalds 2024-08-05 09:23:00 -07:00
commit c813111d19
1 changed files with 3 additions and 0 deletions
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3
mm/slub.c
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@ -4690,6 +4690,9 @@ static void __kmem_cache_free_bulk(struct kmem_cache *s, size_t size, void **p)
if (!df.slab) if (!df.slab)
continue; continue;
if (kfence_free(df.freelist))
continue;
do_slab_free(df.s, df.slab, df.freelist, df.tail, df.cnt, do_slab_free(df.s, df.slab, df.freelist, df.tail, df.cnt,
_RET_IP_); _RET_IP_);
} while (likely(size)); } while (likely(size));