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Date: Fri, 3 Apr 2015 19:06:32 -0700 (PDT)
From: David Rientjes <rientjes@google.com>
Subject: Re: [PATCH] mm, mempool: kasan: poison mempool elements
In-Reply-To: <1428072467-21668-1-git-send-email-a.ryabinin@samsung.com>
Message-ID: <alpine.DEB.2.10.1504031906170.8970@chino.kir.corp.google.com>
References: <1428072467-21668-1-git-send-email-a.ryabinin@samsung.com>
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To: Andrey Ryabinin <a.ryabinin@samsung.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, Dave Kleikamp <shaggy@kernel.org>, Christoph Hellwig <hch@lst.de>, Sebastian Ott <sebott@linux.vnet.ibm.com>, Mikulas Patocka <mpatocka@redhat.com>, Catalin Marinas <catalin.marinas@arm.com>, LKML <linux-kernel@vger.kernel.org>, linux-mm@kvack.org, jfs-discussion@lists.sourceforge.net, Dmitry Chernenkov <drcheren@gmail.com>, Dmitry Vyukov <dvyukov@google.com>, Alexander Potapenko <glider@google.com>

On Fri, 3 Apr 2015, Andrey Ryabinin wrote:

> Mempools keep allocated objects in reserved for situations
> when ordinary allocation may not be possible to satisfy.
> These objects shouldn't be accessed before they leave
> the pool.
> This patch poison elements when get into the pool
> and unpoison when they leave it. This will let KASan
> to detect use-after-free of mempool's elements.
> 
> Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>

Tested-by: David Rientjes <rientjes@google.com>

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