KVM: nVMX: vmread should not set rflags to specify success in case of #PF

In case writing to vmread destination operand result in a #PF, vmread
should not call nested_vmx_succeed() to set rflags to specify success.
Similar to as done in VMPTRST (See handle_vmptrst()).

Reviewed-by: Liran Alon <[email protected]>
Signed-off-by: Miaohe Lin <[email protected]>
Cc: [email protected]
Reviewed-by: Sean Christopherson <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>

Author: MiaoheLin

arch/x86/kvm/vmx/nested.c

@@ -4799,8 +4799,10 @@ static int handle_vmread(struct kvm_vcpu *vcpu)
 					instr_info, true, len, &gva))
 			return 1;
 		/* _system ok, nested_vmx_check_permission has verified cpl=0 */
-		if (kvm_write_guest_virt_system(vcpu, gva, &value, len, &e))
+		if (kvm_write_guest_virt_system(vcpu, gva, &value, len, &e)) {
 			kvm_inject_page_fault(vcpu, &e);
+			return 1;
+		}
 	}
 
 	return nested_vmx_succeed(vcpu);