Re: 2.6.26-git: NULL pointer deref in __switch_to

[Patrick McHardy]

Ingo Molnar wrote:
> * Suresh Siddha <suresh.b.siddha@xxxxxxxxx> wrote:
>
>   
> > Somehow (as described below?) TS_USEDFPU is set but the fpu is not 
> > allocated or freed.
> >
> > Please try the appended patch.
> >     
>
> i've queued up your fix in tip/x86/urgent. (Git access coordinates: 
> http://people.redhat.com/mingo/tip.git/README)
>
> i'm wondering why this problem was not hit more frequently. Does it need 
> some special FPU use to trigger? Or does it need an exec() with the FPU 
> stack still active? (normally the FPU stack is empty at exec() time)

I've recently started running three lguest instances on that machine,
maybe that has something to do with it.


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