diff options
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 632561b2a3f6..b0d291518e88 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4034,10 +4034,16 @@ long kvm_arch_vm_ioctl(struct file *filp, case KVM_SET_IDENTITY_MAP_ADDR: { u64 ident_addr; + mutex_lock(&kvm->lock); + r = -EINVAL; + if (kvm->created_vcpus) + goto set_identity_unlock; r = -EFAULT; if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) - goto out; + goto set_identity_unlock; r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); +set_identity_unlock: + mutex_unlock(&kvm->lock); break; } case KVM_SET_NR_MMU_PAGES: |