diff options
| -rw-r--r-- | arch/x86/kvm/svm/nested.c | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index 8453c898b68b..3d8824e1448f 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -215,7 +215,19 @@ static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm) return true; } -static bool nested_vmcb_check_controls(struct vmcb_control_area *control) +/* + * Bits 11:0 of bitmap address are ignored by hardware + */ +static bool nested_svm_check_bitmap_pa(struct kvm_vcpu *vcpu, u64 pa, u32 size) +{ + u64 addr = PAGE_ALIGN(pa); + + return kvm_vcpu_is_legal_gpa(vcpu, addr) && + kvm_vcpu_is_legal_gpa(vcpu, addr + size - 1); +} + +static bool nested_vmcb_check_controls(struct kvm_vcpu *vcpu, + struct vmcb_control_area *control) { if (CC(!vmcb_is_intercept(control, INTERCEPT_VMRUN))) return false; @@ -226,6 +238,13 @@ static bool nested_vmcb_check_controls(struct vmcb_control_area *control) if (CC((control->nested_ctl & SVM_NESTED_CTL_NP_ENABLE) && !npt_enabled)) return false; + if (CC(!nested_svm_check_bitmap_pa(vcpu, control->msrpm_base_pa, + MSRPM_SIZE))) + return false; + if (CC(!nested_svm_check_bitmap_pa(vcpu, control->iopm_base_pa, + IOPM_SIZE))) + return false; + return true; } @@ -604,7 +623,7 @@ int nested_svm_vmrun(struct kvm_vcpu *vcpu) nested_load_control_from_vmcb12(svm, &vmcb12->control); if (!nested_vmcb_valid_sregs(vcpu, &vmcb12->save) || - !nested_vmcb_check_controls(&svm->nested.ctl)) { + !nested_vmcb_check_controls(vcpu, &svm->nested.ctl)) { vmcb12->control.exit_code = SVM_EXIT_ERR; vmcb12->control.exit_code_hi = 0; vmcb12->control.exit_info_1 = 0; @@ -1252,7 +1271,7 @@ static int svm_set_nested_state(struct kvm_vcpu *vcpu, goto out_free; ret = -EINVAL; - if (!nested_vmcb_check_controls(ctl)) + if (!nested_vmcb_check_controls(vcpu, ctl)) goto out_free; /* |