Bug#538332: linux-2.6: [x86] Null pointer dereference in hrtick_start_fair.

[Moritz Muehlenhoff <jmm@inutil.org>]

On Fri, Jul 24, 2009 at 02:33:38PM -0700, Alok Kataria wrote:
> Package: linux-2.6
> Version: Debian 5.0r2
> 
> Hi,
> 
> There was a regression on mainline kernel due to my patches for tsc
> unification. 
> It seems lenny has picked-up those unification patches but didn't pick
> the fix for that regression. 
> 
> I checked sources for Debian5 5.0r2 and its missing the fix.
> 
> The commit details for the fix are
> 
> commit 3d0decc4f49e8645cd6369b02ed076bebd3d61ad
> Author: Ingo Molnar <mingo@elte.hu>
> Date:   Fri Jul 11 15:09:15 2008 +0200
> 
>     x86: fix tsc unification buglet with ftrace and stackprotector
> 
> 
> Please include it in the next security update. 
> We have seen null pointer de-reference in hrtick_start_fair during
> bootup, similar to one mentioned in the commit details.

Thanks, merged in SVN for the next point update.

Cheers,
        Moritz