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| author | Paolo Bonzini <pbonzini@redhat.com> | 2020-07-27 09:00:37 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-07-27 09:04:49 -0400 |
| commit | 0f02bd0ade9a552492463c0159abbe26c4d92b40 (patch) | |
| tree | d9caefa4c391d455f3282981673443684a32c1b2 /tools | |
| parent | 9319676595a2da8022327119e89c8b13f934835e (diff) | |
| download | linux-0f02bd0ade9a552492463c0159abbe26c4d92b40.tar.bz2 | |
KVM: nVMX: check for required but missing VMCS12 in KVM_SET_NESTED_STATE
A missing VMCS12 was not causing -EINVAL (it was just read with
copy_from_user, so it is not a security issue, but it is still
wrong). Test for VMCS12 validity and reject the nested state
if a VMCS12 is required but not present.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c b/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c index d14a34f1b018..94f28a657569 100644 --- a/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c +++ b/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c @@ -183,9 +183,19 @@ void test_vmx_nested_state(struct kvm_vm *vm) state->hdr.vmx.smm.flags = KVM_STATE_NESTED_SMM_GUEST_MODE; test_nested_state_expect_einval(vm, state); - /* Size must be large enough to fit kvm_nested_state and vmcs12. */ + /* + * Size must be large enough to fit kvm_nested_state and vmcs12 + * if VMCS12 physical address is set + */ + set_default_vmx_state(state, state_sz); + state->size = sizeof(*state); + state->flags = 0; + test_nested_state_expect_einval(vm, state); + set_default_vmx_state(state, state_sz); state->size = sizeof(*state); + state->flags = 0; + state->hdr.vmx.vmcs12_pa = -1; test_nested_state(vm, state); /* |