Agreed. Thanks for spotting this, Andrew.
No, we should not let users read PCI registers in such a fashion that will
cauase the system to crash.
>
> Kenneth D. Merry writes:
> > As for PCIOCREAD, it only allows reading of PCI registers, so the question
> > there is whether there are any potential security implications to allowing
> > non-root users to read PCI registers. If reading configuration registers
> > caused performance degredation, for instance.
>
> I think that you might be able to crash an alpha with an unaligned
> access trap by reading an int or short an from an unaligned offset in
> config space. At least this used to be true.. I'd vote for leaving
> the access permissions as is.
>
> Drew
>
>
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