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| author | Maxim Levitsky <mlevitsk@redhat.com> | 2021-09-14 18:48:16 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-09-23 17:06:46 +0300 |
| commit | faf6b755629627f19feafa75b32e81cd7738f12d (patch) | |
| tree | db74db774aa57c6abeec1340a9d1806de8da51b7 /arch | |
| parent | d1cba6c9223751f580dcd97501f513a8a9bf88bc (diff) | |
| download | linux-faf6b755629627f19feafa75b32e81cd7738f12d.tar.xz | |
KVM: x86: nSVM: don't copy virt_ext from vmcb12
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>
Message-Id: <20210914154825.104886-6-mlevitsk@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/svm/nested.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index b41a21cac544..510b833cbd39 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; |