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Subject: Re: [PATCH v5] mm, kasan: switch SLUB to stackdepot, enable memory
 quarantine for SLUB
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From: Andrey Ryabinin <aryabinin@virtuozzo.com>
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Date: Thu, 7 Jul 2016 13:23:07 +0300
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Sender: owner-linux-mm@kvack.org
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To: Alexander Potapenko <glider@google.com>, Sasha Levin <sasha.levin@oracle.com>
Cc: Andrey Konovalov <adech.fo@gmail.com>, Christoph Lameter <cl@linux.com>, Dmitriy Vyukov <dvyukov@google.com>, Andrew Morton <akpm@linux-foundation.org>, Steven Rostedt <rostedt@goodmis.org>, Joonsoo Kim <iamjoonsoo.kim@lge.com>, Joonsoo Kim <js1304@gmail.com>, Kostya Serebryany <kcc@google.com>, Kuthonuzo Luruo <kuthonuzo.luruo@hpe.com>, kasan-dev <kasan-dev@googlegroups.com>, Linux Memory Management List <linux-mm@kvack.org>, LKML <linux-kernel@vger.kernel.org>



On 07/07/2016 01:01 PM, Alexander Potapenko wrote:
> Any idea which config option triggers this code path?
> I don't see it with my config, and the config from kbuild doesn't boot for me.
> (I'm trying to bisect the diff between them now)
> 

Boot with slub_debug=FPZU.

As I said before, check_pad_bytes() is broken. Sasha's problem very likely caused by it.

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