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

[Sean Christopherson <seanjc@google.com>]

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.

v1: https://lore.kernel.org/all/20260623091556.1500930-2-joro@8bytes.org

Joerg Roedel (1):
  KVM: SEV: Explicitly disallow NULL user address for SNP_LAUNCH_UPDATE

Sean Christopherson (1):
  KVM: TDX: Return EINVAL, not EOPNOTSUPP, for NULL INIT_MEM_REGION
    source

 arch/x86/kvm/svm/sev.c | 11 +++++------
 arch/x86/kvm/vmx/tdx.c |  7 ++-----
 2 files changed, 7 insertions(+), 11 deletions(-)


base-commit: a204badd8432f93b7e862e7dac6db0fe3d65f370
-- 
2.55.0.rc0.799.gd6f94ed593-goog