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
