[PATCH 0/4] KVM: VMX: Fix handling of invalid L2 guest state

[Sean Christopherson <seanjc@google.com>]

Fixes and a test for invalid L2 guest state.  TL;DR: KVM should never
emulate L2 if L2's guest state is invalid.

Patch 01 fixes a regression found by syzbot. Patch 02 closes what I suspect
was the hole the buggy patch was trying to close.  Patch 03 is a related
docs update.  Patch 04 is a selftest for the regression and for a subset
of patch 02's behavior.

Sean Christopherson (4):
  KVM: VMX: Always clear vmx->fail on emulation_required
  KVM: nVMX: Synthesize TRIPLE_FAULT for L2 if emulation is required
  KVM: VMX: Fix stale docs for kvm-intel.emulate_invalid_guest_state
  KVM: selftests: Add test to verify TRIPLE_FAULT on invalid L2 guest
    state

 .../admin-guide/kernel-parameters.txt         |   8 +-
 arch/x86/kvm/vmx/vmx.c                        |  36 ++++--
 tools/testing/selftests/kvm/.gitignore        |   1 +
 tools/testing/selftests/kvm/Makefile          |   1 +
 .../x86_64/vmx_invalid_nested_guest_state.c   | 105 ++++++++++++++++++
 5 files changed, 138 insertions(+), 13 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/x86_64/vmx_invalid_nested_guest_state.c

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2.34.1.400.ga245620fadb-goog