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Subject: Re: [PATCH v4 5/5] kasan: added functions for unpoisoning stack
 variables
References: <20171204191735.132544-1-paullawrence@google.com>
 <20171204191735.132544-6-paullawrence@google.com>
From: Andrey Ryabinin <aryabinin@virtuozzo.com>
Message-ID: <f324833c-bf22-2548-98e3-764fbd2d49b0@virtuozzo.com>
Date: Tue, 5 Dec 2017 19:37:31 +0300
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To: Paul Lawrence <paullawrence@google.com>, Alexander Potapenko <glider@google.com>, Dmitry Vyukov <dvyukov@google.com>, Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kbuild@vger.kernel.org, Matthias Kaehlcke <mka@chromium.org>, Michael Davidson <md@google.com>, Greg Hackmann <ghackmann@google.com>



On 12/04/2017 10:17 PM, Paul Lawrence wrote:
> From: Alexander Potapenko <glider@google.com>
> 
> As a code-size optimization, LLVM builds since r279383 may
> bulk-manipulate the shadow region when (un)poisoning large memory
> blocks.  This requires new callbacks that simply do an uninstrumented
> memset().
> 
> This fixes linking the Clang-built kernel when using KASAN.
> 
> Signed-off-by: Alexander Potapenko <glider@google.com>
> [ghackmann@google.com: fix memset() parameters, and tweak
>  commit message to describe new callbacks]
> Signed-off-by: Greg Hackmann <ghackmann@google.com>
> Signed-off-by: Paul Lawrence <paullawrence@google.com>
> ---

Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>

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