linux-kernel - Re: [PATCH v5] mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB

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Date:	Thu, 7 Jul 2016 13:23:07 +0300
From:	Andrey Ryabinin <aryabinin@...tuozzo.com>
To:	Alexander Potapenko <glider@...gle.com>,
	Sasha Levin <sasha.levin@...cle.com>
CC:	Andrey Konovalov <adech.fo@...il.com>,
	Christoph Lameter <cl@...ux.com>,
	Dmitriy Vyukov <dvyukov@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	"Joonsoo Kim" <iamjoonsoo.kim@....com>,
	Joonsoo Kim <js1304@...il.com>,
	"Kostya Serebryany" <kcc@...gle.com>,
	Kuthonuzo Luruo <kuthonuzo.luruo@....com>,
	kasan-dev <kasan-dev@...glegroups.com>,
	Linux Memory Management List <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5] mm, kasan: switch SLUB to stackdepot, enable memory
 quarantine for SLUB



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.