From: Ingo Molnar <mingo@elte.hu>
To: Jack Steiner <steiner@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
rusty@rustcorp.com.au, sfr@canb.auug.org.au,
linux-kernel@vger.kernel.org, stable@kernel.org
Subject: Re: [PATCH] - Updated: Fix slab corruption caused by alloc_cpumask_var_node()
Date: Fri, 3 Apr 2009 00:23:59 +0200 [thread overview]
Message-ID: <20090402222359.GE9239@elte.hu> (raw)
In-Reply-To: <20090402220900.GA15129@sgi.com>
* Jack Steiner <steiner@sgi.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@sgi.com>
> Acked-by: Mike Travis <travis.sgi.com>
> Acked-by: Ingo Molnar <mingo@elte.hu>
In the future you can add:
Cc: <stable@kernel.org>
to the signoff/ack section of the changlog in such cases - then the
-stable folks will notice the commit automatically.
Thanks,
Ingo
next prev parent reply other threads:[~2009-04-02 22:25 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-02 21:27 [PATCH] - Fix slab corruption caused by alloc_cpumask_var_node() Jack Steiner
2009-04-02 21:39 ` Andrew Morton
2009-04-02 22:09 ` [PATCH] - Updated: " Jack Steiner
2009-04-02 22:23 ` Ingo Molnar [this message]
2009-04-02 21:42 ` [PATCH] - " Ingo Molnar
2009-04-05 5:31 ` Rusty Russell
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