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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAJcbSZFs3wJ3hEkvWoLH-9h+Dk_mTCfRUnH7o1JvcS-5AGY3kQ@mail.gmail.com>
Date:	Wed, 6 Apr 2016 14:03:22 -0700
From:	Thomas Garnier <thgarnie@...gle.com>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	kernel-hardening@...ts.openwall.com,
	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>,
	Greg Thelen <gthelen@...gle.com>,
	Kees Cook <keescook@...omium.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	labbott@...oraproject.org
Subject: Re: [kernel-hardening] [RFC v1] mm: SLAB freelist randomization

Yes, sorry about that. It will be in the next RFC or PATCH.

On Wed, Apr 6, 2016 at 1:54 PM, Greg KH <gregkh@...uxfoundation.org> wrote:
> 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
>> ---
>
> No signed-off-by:?
>