From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <owner-linux-mm@kvack.org>
Received: from mail-pd0-f172.google.com (mail-pd0-f172.google.com [209.85.192.172])
	by kanga.kvack.org (Postfix) with ESMTP id B40E46B00A3
	for <linux-mm@kvack.org>; Thu, 18 Sep 2014 12:59:44 -0400 (EDT)
Received: by mail-pd0-f172.google.com with SMTP id v10so1794304pde.17
        for <linux-mm@kvack.org>; Thu, 18 Sep 2014 09:59:44 -0700 (PDT)
Received: from aserp1040.oracle.com (aserp1040.oracle.com. [141.146.126.69])
        by mx.google.com with ESMTPS id dl9si13557957pdb.66.2014.09.18.09.59.43
        for <linux-mm@kvack.org>
        (version=TLSv1 cipher=RC4-SHA bits=128/128);
        Thu, 18 Sep 2014 09:59:43 -0700 (PDT)
Message-ID: <541B0E35.4090302@oracle.com>
Date: Thu, 18 Sep 2014 12:54:13 -0400
From: Sasha Levin <sasha.levin@oracle.com>
MIME-Version: 1.0
Subject: Re: [RFC/PATCH v2 02/10] x86_64: add KASan support
References: <1404905415-9046-1-git-send-email-a.ryabinin@samsung.com> <1410359487-31938-1-git-send-email-a.ryabinin@samsung.com> <1410359487-31938-3-git-send-email-a.ryabinin@samsung.com> <5410724B.8000803@intel.com> <CAPAsAGzm29VWz8ZvOu+fVGn4Vbj7bQZAnB11M5ZZXRTQTchj0w@mail.gmail.com> <5410D486.4060200@intel.com> <9E98939B-E2C6-4530-A822-ED550FC3B9D2@zytor.com> <54112512.6040409@oracle.com> <54118CC9.8070405@samsung.com>
In-Reply-To: <54118CC9.8070405@samsung.com>
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 7bit
Sender: owner-linux-mm@kvack.org
List-ID: <linux-mm.kvack.org>
To: Andrey Ryabinin <a.ryabinin@samsung.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>, Dave Hansen <dave.hansen@intel.com>, Andrey Ryabinin <ryabinin.a.a@gmail.com>, LKML <linux-kernel@vger.kernel.org>, Dmitry Vyukov <dvyukov@google.com>, Konstantin Serebryany <kcc@google.com>, Dmitry Chernenkov <dmitryc@google.com>, Andrey Konovalov <adech.fo@gmail.com>, Yuri Gribov <tetra2005@gmail.com>, Konstantin Khlebnikov <koct9i@gmail.com>, Christoph Lameter <cl@linux.com>, Joonsoo Kim <iamjoonsoo.kim@lge.com>, Andrew Morton <akpm@linux-foundation.org>, Andi Kleen <andi@firstfloor.org>, Vegard Nossum <vegard.nossum@gmail.com>, "x86@kernel.org" <x86@kernel.org>, "linux-mm@kvack.org" <linux-mm@kvack.org>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>

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@samsung.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

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>