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KVM: SVM: do not allow VMRUN inside SMM

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VMRUN is not supported inside the SMM handler and the behavior is undefined.
Just raise a #UD.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2020-04-23 10:52:48 -04:00
parent acd05785e4
commit 7c67f54661
1 changed files with 5 additions and 1 deletions
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6
arch/x86/kvm/svm/nested.c
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@ -345,8 +345,12 @@ int nested_svm_vmrun(struct vcpu_svm *svm)
struct kvm_host_map map;
u64 vmcb_gpa;
vmcb_gpa = svm->vmcb->save.rax;
if (is_smm(&svm->vcpu)) {
kvm_queue_exception(&svm->vcpu, UD_VECTOR);
return 1;
}
vmcb_gpa = svm->vmcb->save.rax;
ret = kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(vmcb_gpa), &map);
if (ret == -EINVAL) {
kvm_inject_gp(&svm->vcpu, 0);