static void cm_add_one(struct ib_device *ib_device)
{
	struct cm_device *cm_dev;
	struct cm_port *port;
	struct ib_mad_reg_req reg_req = {
		.mgmt_class = IB_MGMT_CLASS_CM,
		.mgmt_class_version = IB_CM_CLASS_VERSION
	};
	struct ib_port_modify port_modify = {
		.set_port_cap_mask = IB_PORT_CM_SUP
	};
	unsigned long flags;
	int ret;
	u8 i;

	if (rdma_node_get_transport(ib_device->node_type) != RDMA_TRANSPORT_IB)
		return;

	cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) *
			 ib_device->phys_port_cnt, GFP_KERNEL);
	if (!cm_dev)
		return;

	cm_dev->ib_device = ib_device;
	cm_get_ack_delay(cm_dev);

	cm_dev->device = device_create(&cm_class, &ib_device->dev,
				       MKDEV(0, 0), NULL,
				       "%s", ib_device->name);
	if (IS_ERR(cm_dev->device)) {
		kfree(cm_dev);
		return;
	}

	set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask);
	for (i = 1; i <= ib_device->phys_port_cnt; i++) {
		port = kzalloc(sizeof *port, GFP_KERNEL);
		if (!port)
			goto error1;

		cm_dev->port[i-1] = port;
		port->cm_dev = cm_dev;
		port->port_num = i;

		ret = cm_create_port_fs(port);
		if (ret)
			goto error1;

		port->mad_agent = ib_register_mad_agent(ib_device, i,
							IB_QPT_GSI,
							&reg_req,
							0,
							cm_send_handler,
							cm_recv_handler,
							port);
		if (IS_ERR(port->mad_agent))
			goto error2;

		ret = ib_modify_port(ib_device, i, 0, &port_modify);
		if (ret)
			goto error3;
	}
	ib_set_client_data(ib_device, &cm_client, cm_dev);

	write_lock_irqsave(&cm.device_lock, flags);
	list_add_tail(&cm_dev->list, &cm.device_list);
	write_unlock_irqrestore(&cm.device_lock, flags);
	return;

error3:
	ib_unregister_mad_agent(port->mad_agent);
error2:
	cm_remove_port_fs(port);
error1:
	port_modify.set_port_cap_mask = 0;
	port_modify.clr_port_cap_mask = IB_PORT_CM_SUP;
	while (--i) {
		port = cm_dev->port[i-1];
		ib_modify_port(ib_device, port->port_num, 0, &port_modify);
		ib_unregister_mad_agent(port->mad_agent);
		cm_remove_port_fs(port);
	}
	device_unregister(cm_dev->device);
	kfree(cm_dev);
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.