From: Maxim Levitsky mlevitsk@redhat.com
stable inclusion from stable-5.10.71 commit 4ed671e6bc62325729311dbc75c6db52d10233a7 bugzilla: 182981 https://gitee.com/openeuler/kernel/issues/I4I3KD
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit faf6b755629627f19feafa75b32e81cd7738f12d upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.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 df17146e841f..f0946872f5e6 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -447,7 +447,6 @@ static void nested_prepare_vmcb_control(struct vcpu_svm *svm) (svm->nested.ctl.int_ctl & int_ctl_vmcb12_bits) | (svm->nested.hsave->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;