It needs to invalidate CPUID configruations if usersapce provides illegal input. Signed-off-by: Xiaoyao Li <xiaoyao.li@xxxxxxxxx> --- arch/x86/kvm/cpuid.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index cd708b0b460a..2f1a9650b7f2 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -210,6 +210,8 @@ int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, kvm_apic_set_version(vcpu); kvm_x86_ops.cpuid_update(vcpu); r = kvm_update_cpuid(vcpu); + if (r) + vcpu->arch.cpuid_nent = 0; out: vfree(cpuid_entries); @@ -233,6 +235,8 @@ int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, kvm_apic_set_version(vcpu); kvm_x86_ops.cpuid_update(vcpu); r = kvm_update_cpuid(vcpu); + if (r) + vcpu->arch.cpuid_nent = 0; out: return r; } -- 2.18.2
