diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/x86.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 08cfb5e4bd07..0f02d0fe3abb 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -5252,14 +5252,21 @@ static int kvm_vm_ioctl_set_msr_filter(struct kvm *kvm, void __user *argp) struct kvm_msr_filter filter; bool default_allow; int r = 0; + bool empty = true; u32 i; if (copy_from_user(&filter, user_msr_filter, sizeof(filter))) return -EFAULT; - kvm_clear_msr_filter(kvm); + for (i = 0; i < ARRAY_SIZE(filter.ranges); i++) + empty &= !filter.ranges[i].nmsrs; default_allow = !(filter.flags & KVM_MSR_FILTER_DEFAULT_DENY); + if (empty && !default_allow) + return -EINVAL; + + kvm_clear_msr_filter(kvm); + kvm->arch.msr_filter.default_allow = default_allow; /* |