oss-security - Re: CVE Request -- kernel: futex: clear robust

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Date: Wed, 4 Jan 2012 14:23:03 -0800
From: Greg KH <greg@...ah.com>
To: oss-security@...ts.openwall.com
Subject: Re: CVE Request -- kernel: futex: clear robust_list
 on execve

On Wed, Jan 04, 2012 at 11:10:59PM +0100, Petr Matousek wrote:
> Move "exit_robust_list" into mm_release() and clear them
> 
> We don't want to get rid of the futexes just at exit() time, we want to
> drop them when doing an execve() too, since that gets rid of the
> previous VM image too.
> 
> Doing it at mm_release() time means that we automatically always do it
> when we disassociate a VM map from the task.
> 
> Upstream patches:
> 8141c7f3e7aee618312fa1c15109e1219de784a7
> fc6b177dee33365ccb29fe6d2092223cf8d679f9

In the future, could you reference which kernel contained these patches
so I don't have to go look it up?  :)

For the record, the first one showed up in 2.6.28-rc5 and the second in
2.6.32-rc4.

thanks,

greg k-h

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