diff options
| -rw-r--r-- | arch/x86/kvm/svm/svm.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 91352d692845..6ffadbd57744 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -3895,8 +3895,14 @@ static int svm_vcpu_pre_run(struct kvm_vcpu *vcpu) static fastpath_t svm_exit_handlers_fastpath(struct kvm_vcpu *vcpu) { - if (to_svm(vcpu)->vmcb->control.exit_code == SVM_EXIT_MSR && - to_svm(vcpu)->vmcb->control.exit_info_1) + struct vmcb_control_area *control = &to_svm(vcpu)->vmcb->control; + + /* + * Note, the next RIP must be provided as SRCU isn't held, i.e. KVM + * can't read guest memory (dereference memslots) to decode the WRMSR. + */ + if (control->exit_code == SVM_EXIT_MSR && control->exit_info_1 && + nrips && control->next_rip) return handle_fastpath_set_msr_irqoff(vcpu); return EXIT_FASTPATH_NONE; |