Re: [Xen-ia64-devel] VTi: break handling

[Tristan Gingold <Tristan.Gingold@xxxxxxxx>]

Le Mardi 11 Avril 2006 13:59, Xu, Anthony a écrit :
> >> It was used for debug.
> >> Break 0, its opcode is 0,
> >> Usually break 0 is not used by linux kernel and application.
> >> When break 0 is executed, it usually means some thing wrong.
> >
> >Sure, but if an application does break 0, it locks up Xen!
> >Maybe we should add a check.
>
> Normal application will not use break 0, right?
Right and normal application does not crash too :-)
Seriously, this is a security bug to me.  A user must not be able to locks up 
an hypervisor!

> Yes, we can add VTI-DEBUG macro for this.
I simply prefer a check.
I will try to work on this issue.

Tristan.



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