static void sctp_addr_wq_timeout_handler(unsigned long arg)
{
	struct net *net = (struct net *)arg;
	struct sctp_sockaddr_entry *addrw, *temp;
	struct sctp_sock *sp;

	spin_lock_bh(&net->sctp.addr_wq_lock);

	list_for_each_entry_safe(addrw, temp, &net->sctp.addr_waitq, list) {
		pr_debug("%s: the first ent in wq:%p is addr:%pISc for cmd:%d at "
			 "entry:%p\n", __func__, &net->sctp.addr_waitq, &addrw->a.sa,
			 addrw->state, addrw);

#if IS_ENABLED(CONFIG_IPV6)
		/* Now we send an ASCONF for each association */
		/* Note. we currently don't handle link local IPv6 addressees */
		if (addrw->a.sa.sa_family == AF_INET6) {
			struct in6_addr *in6;

			if (ipv6_addr_type(&addrw->a.v6.sin6_addr) &
			    IPV6_ADDR_LINKLOCAL)
				goto free_next;

			in6 = (struct in6_addr *)&addrw->a.v6.sin6_addr;
			if (ipv6_chk_addr(net, in6, NULL, 0) == 0 &&
			    addrw->state == SCTP_ADDR_NEW) {
				unsigned long timeo_val;

				pr_debug("%s: this is on DAD, trying %d sec "
					 "later\n", __func__,
					 SCTP_ADDRESS_TICK_DELAY);

				timeo_val = jiffies;
				timeo_val += msecs_to_jiffies(SCTP_ADDRESS_TICK_DELAY);
				mod_timer(&net->sctp.addr_wq_timer, timeo_val);
				break;
			}
		}
#endif
		list_for_each_entry(sp, &net->sctp.auto_asconf_splist, auto_asconf_list) {
			struct sock *sk;

			sk = sctp_opt2sk(sp);
			/* ignore bound-specific endpoints */
			if (!sctp_is_ep_boundall(sk))
				continue;
			bh_lock_sock(sk);
			if (sctp_asconf_mgmt(sp, addrw) < 0)
				pr_debug("%s: sctp_asconf_mgmt failed\n", __func__);
			bh_unlock_sock(sk);
		}
#if IS_ENABLED(CONFIG_IPV6)
free_next:
#endif
		list_del(&addrw->list);
		kfree(addrw);
	}
	spin_unlock_bh(&net->sctp.addr_wq_lock);
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.