Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.19 133/167] KVM: VMX: Always signal #GP on WRMSR to MSR_IA32_CR_PAT with bad value | Date | Tue, 3 Sep 2019 12:24:45 -0400 |
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From: Sean Christopherson <sean.j.christopherson@intel.com>
[ Upstream commit d28f4290b53a157191ed9991ad05dffe9e8c0c89 ]
The behavior of WRMSR is in no way dependent on whether or not KVM consumes the value.
Fixes: 4566654bb9be9 ("KVM: vmx: Inject #GP on invalid PAT CR") Cc: stable@vger.kernel.org Cc: Nadav Amit <nadav.amit@gmail.com> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- arch/x86/kvm/vmx.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index feff7ed44a2bb..e4bba840a0708 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4265,9 +4265,10 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) MSR_TYPE_W); break; case MSR_IA32_CR_PAT: + if (!kvm_pat_valid(data)) + return 1; + if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) { - if (!kvm_pat_valid(data)) - return 1; vmcs_write64(GUEST_IA32_PAT, data); vcpu->arch.pat = data; break; -- 2.20.1
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