Re: [PATCH v2 0/2] KVM: x86: gmem populate fix and cleanups

[Sean Christopherson]

On Tue, 30 Jun 2026 14:37:09 -0700, Sean Christopherson wrote:
> Fix a user-triggerable WARN due to KVM not pre-checking that userspace
> provided a source page for non-ZERO pages for SNP_LAUNCH_UPDATE, and then
> clean up the equivalent TDX code to also explicitly check the incoming
> source page *before* calling into guest_memfd, and to return -EINVAL, not
> -EOPNOTSUPP.
> 
> v2:
>  - Rewrite the SNP patch changelog.
>  - Tweak the code to avoid checking KVM_SEV_SNP_PAGE_TYPE_ZERO twice.
>  - Drop what is now effectively a sanity check in sev_gmem_post_populate(),
>    so that we don't have to duplicate the logic when in-place conversion comes
>    along.
>  - Tack on the TDX change.
> 
> [...]

Applied to kvm-x86 misc, thanks!

[1/2] KVM: SEV: Explicitly disallow NULL user address for SNP_LAUNCH_UPDATE
      https://github.com/kvm-x86/linux/commit/2abe1ff20151
[2/2] KVM: TDX: Return EINVAL, not EOPNOTSUPP, for NULL INIT_MEM_REGION source
      https://github.com/kvm-x86/linux/commit/eb606a243863

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https://github.com/kvm-x86/linux/tree/next