linux-kernel - Re: [kernel-hardening] [RFC v1] mm: SLAB freelist randomization

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Date:	Wed, 6 Apr 2016 13:54:29 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	kernel-hardening@...ts.openwall.com
Cc:	Christoph Lameter <cl@...ux.com>,
	Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Andrew Morton <akpm@...ux-foundation.org>, gthelen@...gle.com,
	keescook@...omium.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, labbott@...oraproject.org,
	Thomas Garnier <thgarnie@...gle.com>
Subject: Re: [kernel-hardening] [RFC v1] mm: SLAB freelist randomization

On Wed, Apr 06, 2016 at 12:35:48PM -0700, Thomas Garnier wrote:
> Provide an optional config (CONFIG_FREELIST_RANDOM) to randomize the
> SLAB freelist. This security feature reduces the predictability of
> the kernel slab allocator against heap overflows.
> 
> Randomized lists are pre-computed using a Fisher-Yates shuffle and
> re-used on slab creation for performance.
> ---
> Based on next-20160405
> ---

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