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From: Yves-Alexis Perez <corsac@debian.org>
Date: Thu, 07 Apr 2016 18:17:47 +0200
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Subject: Re: [kernel-hardening] Re: [RFC v1] mm: SLAB freelist randomization
To: kernel-hardening@lists.openwall.com, Thomas Garnier <thgarnie@google.com>
Cc: Christoph Lameter <cl@linux.com>, Pekka Enberg <penberg@kernel.org>, David Rientjes <rientjes@google.com>, Joonsoo Kim <iamjoonsoo.kim@lge.com>, Andrew Morton <akpm@linux-foundation.org>, Greg Thelen <gthelen@google.com>, LKML <linux-kernel@vger.kernel.org>, Linux-MM <linux-mm@kvack.org>, Laura Abbott <labbott@fedoraproject.org>
List-ID: <kernel-hardening.lists.openwall.com>


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On mer., 2016-04-06 at 14:45 -0700, Kees Cook wrote:
> > This security feature reduces the predictability of
> > the kernel slab allocator against heap overflows.
>=20
> I would add "... rendering attacks much less stable." And if you can
> find a specific example exploit that is foiled by this, I would refer
> to it.

One good example might (or might not) be the keyring issue from earlier thi=
s
year (CVE-2016-0728):

http://perception-point.io/2016/01/14/analysis-and-exploitation-of-a-linux-=
ker
nel-vulnerability-cve-2016-0728/

Regards,
--=20
Yves-Alexis


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