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kvm: x86: don't kill guest on unknown exit reason

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KVM_EXIT_UNKNOWN is a kvm bug, we don't really know whether it was
triggered by a priveledged application.  Let's not kill the guest: WARN
and inject #UD instead.

Cc: stable@vger.kernel.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2014-09-18 16:21:16 +03:00 committed by Paolo Bonzini
parent a642fc3050
commit 2bc19dc375
2 changed files with 6 additions and 6 deletions
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6
arch/x86/kvm/svm.c
View File

@ -3551,9 +3551,9 @@ static int handle_exit(struct kvm_vcpu *vcpu)
if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
|| !svm_exit_handlers[exit_code]) {
kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
kvm_run->hw.hardware_exit_reason = exit_code;
return 0;
WARN_ONCE(1, "vmx: unexpected exit reason 0x%x\n", exit_code);
kvm_queue_exception(vcpu, UD_VECTOR);
return 1;
}
return svm_exit_handlers[exit_code](svm);

6
arch/x86/kvm/vmx.c
View File

@ -7174,10 +7174,10 @@ static int vmx_handle_exit(struct kvm_vcpu *vcpu)
&& kvm_vmx_exit_handlers[exit_reason])
return kvm_vmx_exit_handlers[exit_reason](vcpu);
else {
vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
vcpu->run->hw.hardware_exit_reason = exit_reason;
WARN_ONCE(1, "vmx: unexpected exit reason 0x%x\n", exit_reason);
kvm_queue_exception(vcpu, UD_VECTOR);
return 1;
}
return 0;
}
static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)