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

Author: torvalds

mm/slub.c

@@ -4690,6 +4690,9 @@ static void __kmem_cache_free_bulk(struct kmem_cache *s, size_t size, void **p)
 		if (!df.slab)
 			continue;
 
+		if (kfence_free(df.freelist))
+			continue;
+
 		do_slab_free(df.s, df.slab, df.freelist, df.tail, df.cnt,
 			     _RET_IP_);
 	} while (likely(size));