Messages in this thread Patch in this message | | | From | Xiaoyao Li <> | Subject | [PATCH v2 1/7] KVM: X86: Reset vcpu->arch.cpuid_nent to 0 if SET_CPUID fails | Date | Tue, 23 Jun 2020 19:58:10 +0800 |
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It needs to invalidate CPUID configruations if usersapce provides illegal input.
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com> --- 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 8a294f9747aa..1d13bad42bf9 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -207,6 +207,8 @@ 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; kvfree(cpuid_entries); out: @@ -230,6 +232,8 @@ 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
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