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Message-ID: <56798851.60906@intel.com>
Date: Tue, 22 Dec 2015 09:28:49 -0800
From: Dave Hansen <dave.hansen@...el.com>
To: Christoph Lameter <cl@...ux.com>
Cc: kernel-hardening@...ts.openwall.com, Pekka Enberg <penberg@...nel.org>,
David Rientjes <rientjes@...gle.com>, Joonsoo Kim <iamjoonsoo.kim@....com>,
Andrew Morton <akpm@...ux-foundation.org>, Laura Abbott
<laura@...bott.name>, linux-mm@...ck.org, linux-kernel@...r.kernel.org,
Kees Cook <keescook@...omium.org>
Subject: Re: [RFC][PATCH 6/7] mm: Add Kconfig option for
slab sanitization
On 12/22/2015 09:24 AM, Christoph Lameter wrote:
> On Tue, 22 Dec 2015, Dave Hansen wrote:
>> Or are you just saying that we should use the poisoning *code* that we
>> already have in slub? Using the _code_ looks like a really good idea,
>> whether we're using it to write POISON_FREE, or 0's. Something like the
>> attached patch?
>
> Why would you use zeros? The point is just to clear the information right?
> The regular poisoning does that.
It then allows you to avoid the zeroing at allocation time.
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