| Message ID | 20210914154825.104886-6-mlevitsk@redhat.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | nSVM fixes and optional features | expand |
On 14/09/21 17:48, Maxim Levitsky wrote: > These field correspond to features that we don't expose yet to L2 > > While currently there are no CVE worthy features in this field, > if AMD adds more features to this field, that could allow guest > escapes similar to CVE-2021-3653 and CVE-2021-3656. > > Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com> > --- > arch/x86/kvm/svm/nested.c | 1 - > 1 file changed, 1 deletion(-) > > diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c > index 476e01f98035..4df59d9795b6 100644 > --- a/arch/x86/kvm/svm/nested.c > +++ b/arch/x86/kvm/svm/nested.c > @@ -545,7 +545,6 @@ static void nested_vmcb02_prepare_control(struct vcpu_svm *svm) > (svm->nested.ctl.int_ctl & int_ctl_vmcb12_bits) | > (svm->vmcb01.ptr->control.int_ctl & int_ctl_vmcb01_bits); > > - svm->vmcb->control.virt_ext = svm->nested.ctl.virt_ext; > svm->vmcb->control.int_vector = svm->nested.ctl.int_vector; > svm->vmcb->control.int_state = svm->nested.ctl.int_state; > svm->vmcb->control.event_inj = svm->nested.ctl.event_inj; > Queued, thanks. Paolo
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index 476e01f98035..4df59d9795b6 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -545,7 +545,6 @@ static void nested_vmcb02_prepare_control(struct vcpu_svm *svm) (svm->nested.ctl.int_ctl & int_ctl_vmcb12_bits) | (svm->vmcb01.ptr->control.int_ctl & int_ctl_vmcb01_bits); - svm->vmcb->control.virt_ext = svm->nested.ctl.virt_ext; svm->vmcb->control.int_vector = svm->nested.ctl.int_vector; svm->vmcb->control.int_state = svm->nested.ctl.int_state; svm->vmcb->control.event_inj = svm->nested.ctl.event_inj;
These field correspond to features that we don't expose yet to L2 While currently there are no CVE worthy features in this field, if AMD adds more features to this field, that could allow guest escapes similar to CVE-2021-3653 and CVE-2021-3656. Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com> --- arch/x86/kvm/svm/nested.c | 1 - 1 file changed, 1 deletion(-)