Re: Kernel-Crash when working with ubt0

> > > Hmm... interesting....
> > >
> > > I only took a brief look at it. I suppose I can ensure user space address is wired and then copyout() can be called with mutex held
> >
> > >No, you cannot do this, at least without making the kernel to panic.
> > User might unmap the wired mapping at any time still.
>
> Kostik,
>
> i was thinking along the lines of vslock/vsunlock and copyout_nofault.
> basically similar to the sysctl code. do you think this would not
> work?

actually, i dont think i need to hold lock over copyout. attached is
my version of the patch (untested)

thanks,
max