static inline struct pppox_sock *get_item_by_addr(struct net *net,
						struct sockaddr_pppox *sp)
{
	struct net_device *dev;
	struct pppoe_net *pn;
	struct pppox_sock *pppox_sock = NULL;

	int ifindex;

	rcu_read_lock();
	dev = dev_get_by_name_rcu(net, sp->sa_addr.pppoe.dev);
	if (dev) {
		ifindex = dev->ifindex;
		pn = pppoe_pernet(net);
		pppox_sock = get_item(pn, sp->sa_addr.pppoe.sid,
				sp->sa_addr.pppoe.remote, ifindex);
	}
	rcu_read_unlock();
	return pppox_sock;
}

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.