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Subject: Re: [PATCH v7 4/4] powerpc: Book3S 64-bit "heavyweight" KASAN support
To: Michael Neuling <mikey@neuling.org>, Daniel Axtens <dja@axtens.net>,
 linux-kernel@vger.kernel.org, linux-mm@kvack.org,
 linuxppc-dev@lists.ozlabs.org, kasan-dev@googlegroups.com,
 aneesh.kumar@linux.ibm.com, bsingharora@gmail.com
References: <20200213004752.11019-1-dja@axtens.net>
 <20200213004752.11019-5-dja@axtens.net>
 <66bd9d8eb682cda2d22bea0fd4035ea8e0a3c1fb.camel@neuling.org>
From: Christophe Leroy <christophe.leroy@c-s.fr>
Message-ID: <a060e08e-c119-0d37-d220-409b3d7539d3@c-s.fr>
Date: Mon, 17 Feb 2020 07:45:46 +0100
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Le 17/02/2020 à 00:08, Michael Neuling a écrit :
> Daniel.
> 
> Can you start this commit message with a simple description of what you are
> actually doing? This reads like you've been on a long journey to Mordor and
> back, which as a reader of this patch in the long distant future, I don't care
> about. I just want to know what you're implementing.
> 
> Also I'm struggling to review this as I don't know what software or hardware
> mechanisms you are using to perform sanitisation.

KASAN is standard, it's simply using GCC ASAN in kernel mode, ie kernel 
is built with -fsanitize=kernel-address 
(https://gcc.gnu.org/onlinedocs/gcc/Instrumentation-Options.html)

You have more details there: 
https://www.kernel.org/doc/html/latest/dev-tools/kasan.html

Christophe