void hci_sock_cleanup(void)
{
	bt_procfs_cleanup(&init_net, "hci");
	bt_sock_unregister(BTPROTO_HCI);
	proto_unregister(&hci_sk_proto);
}

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.