On 10/07/2018 11:27, KarimAllah Ahmed wrote: > @@ -11772,7 +11772,6 @@ static int enter_vmx_non_root_mode(struct kvm_vcpu *vcpu) > if (prepare_vmcs02(vcpu, vmcs12, &exit_qual)) > goto fail; > > - nested_get_vmcs12_pages(vcpu, vmcs12); > > r = EXIT_REASON_MSR_LOAD_FAIL; > msr_entry_idx = nested_vmx_load_msr(vcpu, I think this is not enough, the MSR load should not be redone on KVM_SET_NESTED_STATE. This issue is preexisting and happens for SMM exit as well. SMM exit in fact also needs to defer nested_get_vmcs12_pages, or the pages could be read from SMRAM. I'll send a v6 patch and a testcase, and in the meanwhile I have applied patch 1. Paolo
