Re: [PATCH v2 2/2] pci: ensure configuration access is within bounds

[Michael S. Tsirkin]

On Thu, Jun 04, 2020 at 10:10:07AM +0100, Peter Maydell wrote:
> On Wed, 3 Jun 2020 at 21:26, P J P <ppandit@redhat.com> wrote:
> >
> > From: Prasad J Pandit <pjp@fedoraproject.org>
> >
> > While reading PCI configuration bytes, a guest may send an
> > address towards the end of the configuration space. It may lead
> > to an OOB access issue. Assert that 'address + len' is within
> > PCI configuration space.
> 
> What does the spec say should happen when the guest does this?

Spec says anything can happen *to the device*. Naturally there's
an expectation that while device might crash it stays
resettable and does not blow up.

> Does it depend on the pci controller implementation?
> 
> thanks
> -- PMM

Shouldn't I think.
-- 
MST