[PATCH kernel v2 0/2] KVM: PPC: Check if IOMMU page is contained in the pinned physical page

[Michael Ellerman]

Alexey Kardashevskiy <aik at ozlabs.ru> writes:

> This is to improve page boundaries checking and should probably
> be cc:stable. I came accross this while debugging nvlink2 passthrough
> but the lack of checking might be exploited by the existing userspace.

Do you really mean "exploited" ? As in there's a security issue?

Your change log for patch 2 sort of suggests that but then says that
without the fix you just hit an error in vfio code.

So I'm not clear on what the exposure is.

cheers