linux-kernel - Re: [patch v2 4/4] mm, mempool: poison elements backed by page allocator

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Message-Id: <20150325145523.94d1033b93cd5c1010df93bf@linux-foundation.org>
Date:	Wed, 25 Mar 2015 14:55:23 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Dave Kleikamp <shaggy@...nel.org>, Christoph Hellwig <hch@....de>,
	Sebastian Ott <sebott@...ux.vnet.ibm.com>,
	Mikulas Patocka <mpatocka@...hat.com>,
	Catalin Marinas <catalin.marinas@....com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	jfs-discussion@...ts.sourceforge.net,
	Andrey Ryabinin <a.ryabinin@...sung.com>
Subject: Re: [patch v2 4/4] mm, mempool: poison elements backed by page
 allocator

On Tue, 24 Mar 2015 16:10:01 -0700 (PDT) David Rientjes <rientjes@...gle.com> wrote:

> Elements backed by the slab allocator are poisoned when added to a
> mempool's reserved pool.
> 
> It is also possible to poison elements backed by the page allocator
> because the mempool layer knows the allocation order.
> 
> This patch extends mempool element poisoning to include memory backed by
> the page allocator.
> 
> This is only effective for configs with CONFIG_DEBUG_SLAB or
> CONFIG_SLUB_DEBUG_ON.
> 

Maybe mempools should get KASAN treatment (as well as this)?
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