@@ -929,6 +929,26 @@ static u32 nested_vmx_load_msr(struct kvm_vcpu *vcpu, u64 gpa, u32 count)
return i + 1;
}
+static bool read_and_check_msr_entry(struct kvm_vcpu *vcpu, u64 gpa, int i,
+ struct vmx_msr_entry *e)
+{
+ if (kvm_vcpu_read_guest(vcpu,
+ gpa + i * sizeof(*e),
+ e, 2 * sizeof(u32))) {
+ pr_debug_ratelimited(
+ "%s cannot read MSR entry (%u, 0x%08llx)\n",
+ __func__, i, gpa + i * sizeof(*e));
+ return false;
+ }
+ if (nested_vmx_store_msr_check(vcpu, e)) {
+ pr_debug_ratelimited(
+ "%s check failed (%u, 0x%x, 0x%x)\n",
+ __func__, i, e->index, e->reserved);
+ return false;
+ }
+ return true;
+}
+
static int nested_vmx_store_msr(struct kvm_vcpu *vcpu, u64 gpa, u32 count)
{
u64 data;
@@ -940,20 +960,9 @@ static int nested_vmx_store_msr(struct kvm_vcpu *vcpu, u64 gpa, u32 count)
if (unlikely(i >= max_msr_list_size))
return -EINVAL;
- if (kvm_vcpu_read_guest(vcpu,
- gpa + i * sizeof(e),
- &e, 2 * sizeof(u32))) {
- pr_debug_ratelimited(
- "%s cannot read MSR entry (%u, 0x%08llx)\n",
- __func__, i, gpa + i * sizeof(e));
+ if (!read_and_check_msr_entry(vcpu, gpa, i, &e))
return -EINVAL;
- }
- if (nested_vmx_store_msr_check(vcpu, &e)) {
- pr_debug_ratelimited(
- "%s check failed (%u, 0x%x, 0x%x)\n",
- __func__, i, e.index, e.reserved);
- return -EINVAL;
- }
+
if (kvm_get_msr(vcpu, e.index, &data)) {
pr_debug_ratelimited(
"%s cannot read MSR (%u, 0x%x)\n",