linux-kernel - Re: [PATCH] - Updated: Fix slab corruption caused by alloc_cpumask_var

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20090402222359.GE9239@elte.hu>
Date:	Fri, 3 Apr 2009 00:23:59 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Jack Steiner <steiner@....com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, rusty@...tcorp.com.au,
	sfr@...b.auug.org.au, linux-kernel@...r.kernel.org,
	stable@...nel.org
Subject: Re: [PATCH] - Updated: Fix slab corruption caused by
	alloc_cpumask_var_node()


* Jack Steiner <steiner@....com> wrote:

> Fix slab corruption caused by alloc_cpumask_var_node() overwriting
> the tail end of an off-stack cpumask.
> 
> The function zeros out cpumask bits beyond the last possible cpu.
> The starting point for zeroing should be the beginning
> of the mask offset by a byte count derived from the number
> of possible cpus. The offset was calculated in bits instead of bytes.
> This resulted in overwriting the end of the cpumask.
> 
> 
> v2.6.29 is also affected by this bug.
> 
> 
> Signed-off-by: Jack Steiner <steiner@....com>
> Acked-by: Mike Travis <travis.sgi.com>
> Acked-by: Ingo Molnar <mingo@...e.hu>

In the future you can add:

  Cc: <stable@...nel.org>

to the signoff/ack section of the changlog in such cases - then the 
-stable folks will notice the commit automatically.

Thanks,

	Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/