ip_vs_lookup_real_service(int af, __u16 protocol,
			  const union nf_inet_addr *daddr,
			  __be16 dport)
{
	unsigned hash;
	struct ip_vs_dest *dest;

	/*
	 *	Check for "full" addressed entries
	 *	Return the first found entry
	 */
	hash = ip_vs_rs_hashkey(af, daddr, dport);

	read_lock(&__ip_vs_rs_lock);
	list_for_each_entry(dest, &ip_vs_rtable[hash], d_list) {
		if ((dest->af == af)
		    && ip_vs_addr_equal(af, &dest->addr, daddr)
		    && (dest->port == dport)
		    && ((dest->protocol == protocol) ||
			dest->vfwmark)) {
			/* HIT */
			read_unlock(&__ip_vs_rs_lock);
			return dest;
		}
	}
	read_unlock(&__ip_vs_rs_lock);

	return NULL;
}

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.