linux-kernel - Re: [PATCH 2/2] slab: mark slab->obj_exts allocation failures unconditionally

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Message-ID: <dia6xv4liysr54vdjfpw3bucbvg3eqh4nn4jh57h5htxev2zy6@rtnakdtz7vjb>
Date: Mon, 15 Sep 2025 13:15:19 -0700
From: Shakeel Butt <shakeel.butt@...ux.dev>
To: Suren Baghdasaryan <surenb@...gle.com>
Cc: vbabka@...e.cz, akpm@...ux-foundation.org, cl@...two.org, 
	rientjes@...gle.com, roman.gushchin@...ux.dev, harry.yoo@...cle.com, 
	alexei.starovoitov@...il.com, usamaarif642@...il.com, 00107082@....com, souravpanda@...gle.com, 
	kent.overstreet@...ux.dev, linux-mm@...ck.org, linux-kernel@...r.kernel.org, 
	stable@...r.kernel.org
Subject: Re: [PATCH 2/2] slab: mark slab->obj_exts allocation failures
 unconditionally

On Mon, Sep 15, 2025 at 01:09:18PM -0700, Suren Baghdasaryan wrote:
> 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: 09c46563ff6d ("codetag: debug: introduce OBJEXTS_ALLOC_FAIL to mark failed slab_ext allocations")
> Reported-by: Shakeel Butt <shakeel.butt@...ux.dev>
> Closes: https://lore.kernel.org/all/avhakjldsgczmq356gkwmvfilyvf7o6temvcmtt5lqd4fhp5rk@47gp2ropyixg/
> Signed-off-by: Suren Baghdasaryan <surenb@...gle.com>
> Cc: stable@...r.kernel.org # v6.10+

Acked-by: Shakeel Butt <shakeel.butt@...ux.dev>