linux-kernel - Re: [RFC/PATCH v2 02/10] x86

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Message-ID: <541B0E35.4090302@oracle.com>
Date:	Thu, 18 Sep 2014 12:54:13 -0400
From:	Sasha Levin <sasha.levin@...cle.com>
To:	Andrey Ryabinin <a.ryabinin@...sung.com>
CC:	"H. Peter Anvin" <hpa@...or.com>,
	Dave Hansen <dave.hansen@...el.com>,
	Andrey Ryabinin <ryabinin.a.a@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	Konstantin Serebryany <kcc@...gle.com>,
	Dmitry Chernenkov <dmitryc@...gle.com>,
	Andrey Konovalov <adech.fo@...il.com>,
	Yuri Gribov <tetra2005@...il.com>,
	Konstantin Khlebnikov <koct9i@...il.com>,
	Christoph Lameter <cl@...ux.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <andi@...stfloor.org>,
	Vegard Nossum <vegard.nossum@...il.com>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: [RFC/PATCH v2 02/10] x86_64: add KASan support

On 09/11/2014 07:51 AM, Andrey Ryabinin wrote:
> On 09/11/2014 08:29 AM, Sasha Levin wrote:
>> > On 09/11/2014 12:26 AM, H. Peter Anvin wrote:
>>> >> Except you just broke PVop kernels.
>> > 
>> > So is this why v2 refuses to boot on my KVM guest? (was digging
>> > into that before I send a mail out).
>> > 
> Maybe this will help?
> 
> 
> From: Andrey Ryabinin <a.ryabinin@...sung.com>
> Subject: [PATCH] x86_64: kasan: fix kernel boot with CONFIG_DEBUG_VIRTUAL=y
> 
> Use __pa_nodebug instead of __pa before shadow initialized.
> __pa with CONFIG_DEBUG_VIRTUAL=y may result in __asan_load
> call before shadow area initialized.

Woops, I got sidetracked and forgot to reply. Yes, this patch fixed
the issue, KASan is running properly now.


Thanks,
Sasha
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