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slab: mark slab->obj_exts allocation failures unconditionally

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alloc_slab_obj_exts() should mark failed obj_exts vector allocations
independent on whether the vector is being allocated for a new or an
existing slab. Current implementation skips doing this for existing
slabs. Fix this by marking failed allocations unconditionally.

Fixes: 09c46563ff ("codetag: debug: introduce OBJEXTS_ALLOC_FAIL to mark failed slab_ext allocations")
Reported-by: Shakeel Butt <shakeel.butt@linux.dev>
Closes: https://lore.kernel.org/all/avhakjldsgczmq356gkwmvfilyvf7o6temvcmtt5lqd4fhp5rk@47gp2ropyixg/
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Cc: stable@vger.kernel.org # v6.10+
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
This commit is contained in:
Suren Baghdasaryan 2025-09-15 13:09:18 -07:00 committed by Vlastimil Babka
parent 4038016397
commit f7381b9116
1 changed files with 1 additions and 2 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

3
mm/slub.c
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@ -2039,8 +2039,7 @@ int alloc_slab_obj_exts(struct slab *slab, struct kmem_cache *s,
slab_nid(slab));
if (!vec) {
/* Mark vectors which failed to allocate */
if (new_slab)
mark_failed_objexts_alloc(slab);
mark_failed_objexts_alloc(slab);
return -ENOMEM;
}