On Thu, 01 Jun 2023 18:01:37 -0700, Sean Christopherson wrote:
> Factor in the address space (non-SMM vs. SMM) of the target shadow page
> when recovering potential NX huge pages, otherwise KVM will retrieve the
> wrong memslot when zapping shadow pages that were created for SMM. The
> bug most visibly manifests as a WARN on the memslot being non-NULL, but
> the worst case scenario is that KVM could unaccount the shadow page
> without ensuring KVM won't install a huge page, i.e. if the non-SMM slot
> is being dirty logged, but the SMM slot is not.
>
> [...]
Applied to kvm-x86 fixes, thanks!
[1/1] KVM: x86/mmu: Grab memslot for correct address space in NX recovery worker
https://github.com/kvm-x86/linux/commit/817fa998362d
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https://github.com/kvm-x86/linux/tree/next
https://github.com/kvm-x86/linux/tree/fixes
