static void xhci_class_init(ObjectClass *klass, void *data)
{
    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
    DeviceClass *dc = DEVICE_CLASS(klass);

    dc->vmsd    = &vmstate_xhci;
    dc->props   = xhci_properties;
    dc->reset   = xhci_reset;
    set_bit(DEVICE_CATEGORY_USB, dc->categories);
    k->realize      = usb_xhci_realize;
    k->exit         = usb_xhci_exit;
    k->vendor_id    = PCI_VENDOR_ID_NEC;
    k->device_id    = PCI_DEVICE_ID_NEC_UPD720200;
    k->class_id     = PCI_CLASS_SERIAL_USB;
    k->revision     = 0x03;
    k->is_express   = 1;
}

The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.