From: Sean Christopherson sean.j.christopherson@intel.com
commit d28f4290b53a157191ed9991ad05dffe9e8c0c89 upstream.
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: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/x86/kvm/vmx/vmx.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
--- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -1896,9 +1896,10 @@ static int vmx_set_msr(struct kvm_vcpu * 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;