KVM: x86: fix user triggerable warning in kvm_apic_accept_events()

[mirror_ubuntu-zesty-kernel.git] / arch / x86 / kvm / x86.c

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 969ab22515d34a0bcb5c5eb804d391088cd8d2d8..0a1904b85bdc39ccc3129e90afe21b2709ee93d4 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3085,6 +3085,12 @@ static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu,
            (events->exception.nr > 31 || events->exception.nr == NMI_VECTOR))
                return -EINVAL;
 
+       /* INITs are latched while in SMM */
+       if (events->flags & KVM_VCPUEVENT_VALID_SMM &&
+           (events->smi.smm || events->smi.pending) &&
+           vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED)
+               return -EINVAL;
+
        process_nmi(vcpu);
        vcpu->arch.exception.pending = events->exception.injected;
        vcpu->arch.exception.nr = events->exception.nr;
@@ -7249,6 +7255,12 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
            mp_state->mp_state != KVM_MP_STATE_RUNNABLE)
                return -EINVAL;
 
+       /* INITs are latched while in SMM */
+       if ((is_smm(vcpu) || vcpu->arch.smi_pending) &&
+           (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED ||
+            mp_state->mp_state == KVM_MP_STATE_INIT_RECEIVED))
+               return -EINVAL;
+
        if (mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED) {
                vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED;
                set_bit(KVM_APIC_SIPI, &vcpu->arch.apic->pending_events);