RE: [PATCH] PCI: hv: Move completion variable from stack to heap in hv_compose_msi_msg()

[Long Li]

> Subject: Re: [PATCH] PCI: hv: Move completion variable from stack to heap in
> hv_compose_msi_msg()
> 
> > I agree if the intent is to deal with a untrusted host, I can follow the same
> principle to add this support to all requests to VSP. But this is a different
> problem to what this patch intends to address. I can see they may share the
> same design principle and common code. My question on a untrusted host is:
> If a host is untrusted and is misbehaving on purpose, what's the point of
> keep the VM running and not crashing the PCI driver?
> 
> I think the principle can be summarized with "keep the VM _running, if you
> can handle the misbehaviour (possibly, warning on "something
> wrong/unexpected just happened"); crash, otherwise".
> 
> Of course, this is just a principle: the exact meaning of that 'handle' should be
> leverage case by case (which I admittedly haven't here); I'm thinking, e.g., at
> corresponding complexity/performance impacts and risks of 'mis-
> assessments'.
> 
> Thanks,
>   Andrea

I will follow Michael's suggestion and send v2.

Long