static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
				 struct nlattr *nla, int full_entry)
{
	struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
	struct nlattr *nla_addr, *nla_port;

	/* Parse mandatory identifying destination fields first */
	if (nla == NULL ||
	    nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
		return -EINVAL;

	nla_addr	= attrs[IPVS_DEST_ATTR_ADDR];
	nla_port	= attrs[IPVS_DEST_ATTR_PORT];

	if (!(nla_addr && nla_port))
		return -EINVAL;

	memset(udest, 0, sizeof(*udest));

	nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
	udest->port = nla_get_u16(nla_port);

	/* If a full entry was requested, check for the additional fields */
	if (full_entry) {
		struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
			      *nla_l_thresh;

		nla_fwd		= attrs[IPVS_DEST_ATTR_FWD_METHOD];
		nla_weight	= attrs[IPVS_DEST_ATTR_WEIGHT];
		nla_u_thresh	= attrs[IPVS_DEST_ATTR_U_THRESH];
		nla_l_thresh	= attrs[IPVS_DEST_ATTR_L_THRESH];

		if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
			return -EINVAL;

		udest->conn_flags = nla_get_u32(nla_fwd)
				    & IP_VS_CONN_F_FWD_MASK;
		udest->weight = nla_get_u32(nla_weight);
		udest->u_threshold = nla_get_u32(nla_u_thresh);
		udest->l_threshold = nla_get_u32(nla_l_thresh);
	}

	return 0;
}

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.