KVM: x86: missing locking in PIT/IRQCHIP/SET_BSP_CPU ioctl paths

[profile/ivi/kernel-adaptation-intel-automotive.git] / virt / kvm / kvm_main.c

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 8361662..f1e2e8c 100644 (file)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2274,10 +2274,12 @@ static long kvm_vm_ioctl(struct file *filp,
 #ifdef CONFIG_KVM_APIC_ARCHITECTURE
        case KVM_SET_BOOT_CPU_ID:
                r = 0;
+               mutex_lock(&kvm->lock);
                if (atomic_read(&kvm->online_vcpus) != 0)
                        r = -EBUSY;
                else
                        kvm->bsp_vcpu_id = arg;
+               mutex_unlock(&kvm->lock);
                break;
 #endif
        default: