KVM: x86: reset MMU on KVM_SET_VCPU_EVENTS
Otherwise, mismatch between the smm bit in hflags and the MMU role can cause a NULL pointer dereference. Cc: stable@vger.kernel.org Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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b428018a06
Коммит
6ef4e07ecd
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@ -3070,6 +3070,8 @@ static void kvm_vcpu_ioctl_x86_get_vcpu_events(struct kvm_vcpu *vcpu,
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memset(&events->reserved, 0, sizeof(events->reserved));
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}
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static void kvm_set_hflags(struct kvm_vcpu *vcpu, unsigned emul_flags);
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static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu,
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struct kvm_vcpu_events *events)
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{
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@ -3106,10 +3108,13 @@ static int kvm_vcpu_ioctl_x86_set_vcpu_events(struct kvm_vcpu *vcpu,
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vcpu->arch.apic->sipi_vector = events->sipi_vector;
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if (events->flags & KVM_VCPUEVENT_VALID_SMM) {
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u32 hflags = vcpu->arch.hflags;
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if (events->smi.smm)
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vcpu->arch.hflags |= HF_SMM_MASK;
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hflags |= HF_SMM_MASK;
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else
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vcpu->arch.hflags &= ~HF_SMM_MASK;
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hflags &= ~HF_SMM_MASK;
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kvm_set_hflags(vcpu, hflags);
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vcpu->arch.smi_pending = events->smi.pending;
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if (events->smi.smm_inside_nmi)
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vcpu->arch.hflags |= HF_SMM_INSIDE_NMI_MASK;
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