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    SubjectRe: [PATCH 05/14] KVM: x86: nSVM: don't copy virt_ext from vmcb12
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    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

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