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Date: Thu, 7 Apr 2016 09:35:46 -0700
From: Thomas Garnier <>
To: Yves-Alexis Perez <>
Cc:, Christoph Lameter <>, 
	Pekka Enberg <>, David Rientjes <>, 
	Joonsoo Kim <>, Andrew Morton <>, 
	Greg Thelen <>, LKML <>, 
	Linux-MM <>, Laura Abbott <>
Subject: Re: Re: [RFC v1] mm: SLAB freelist randomization

That's a use after free. The randomization of the freelist should not
have much effect on that. I was going to quote this exploit that is
applicable to SLAB as well:


On Thu, Apr 7, 2016 at 9:17 AM, Yves-Alexis Perez <> wrote:
> 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.
>> 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 this
> year (CVE-2016-0728):
> nel-vulnerability-cve-2016-0728/
> Regards,
> --
> Yves-Alexis

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