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| author | Paolo Bonzini <pbonzini@redhat.com> | 2020-04-23 17:52:48 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-04-24 19:53:18 +0300 |
| commit | 7c67f54661fcc8d141fb11abbab1739f32e13b03 (patch) | |
| tree | 93ec5dd829f65006b556012b53c0897ac0fe64f3 | |
| parent | acd05785e48c01edb2c4f4d014d28478b5f19fb5 (diff) | |
| download | linux-7c67f54661fcc8d141fb11abbab1739f32e13b03.tar.xz | |
KVM: SVM: do not allow VMRUN inside SMM
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>
| -rw-r--r-- | arch/x86/kvm/svm/nested.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index 6ea047e6882e..a7c3b3030e59 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -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); |