static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
{
	struct sk_buff *msg;
	void *reply;
	int ret, cmd, reply_cmd;

	cmd = info->genlhdr->cmd;

	if (cmd == IPVS_CMD_GET_SERVICE)
		reply_cmd = IPVS_CMD_NEW_SERVICE;
	else if (cmd == IPVS_CMD_GET_INFO)
		reply_cmd = IPVS_CMD_SET_INFO;
	else if (cmd == IPVS_CMD_GET_CONFIG)
		reply_cmd = IPVS_CMD_SET_CONFIG;
	else {
		pr_err("unknown Generic Netlink command\n");
		return -EINVAL;
	}

	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
	if (!msg)
		return -ENOMEM;

	mutex_lock(&__ip_vs_mutex);

	reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
	if (reply == NULL)
		goto nla_put_failure;

	switch (cmd) {
	case IPVS_CMD_GET_SERVICE:
	{
		struct ip_vs_service *svc;

		svc = ip_vs_genl_find_service(info->attrs[IPVS_CMD_ATTR_SERVICE]);
		if (IS_ERR(svc)) {
			ret = PTR_ERR(svc);
			goto out_err;
		} else if (svc) {
			ret = ip_vs_genl_fill_service(msg, svc);
			ip_vs_service_put(svc);
			if (ret)
				goto nla_put_failure;
		} else {
			ret = -ESRCH;
			goto out_err;
		}

		break;
	}

	case IPVS_CMD_GET_CONFIG:
	{
		struct ip_vs_timeout_user t;

		__ip_vs_get_timeouts(&t);
#ifdef CONFIG_IP_VS_PROTO_TCP
		NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP, t.tcp_timeout);
		NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
			    t.tcp_fin_timeout);
#endif
#ifdef CONFIG_IP_VS_PROTO_UDP
		NLA_PUT_U32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout);
#endif

		break;
	}

	case IPVS_CMD_GET_INFO:
		NLA_PUT_U32(msg, IPVS_INFO_ATTR_VERSION, IP_VS_VERSION_CODE);
		NLA_PUT_U32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
			    IP_VS_CONN_TAB_SIZE);
		break;
	}

	genlmsg_end(msg, reply);
	ret = genlmsg_reply(msg, info);
	goto out;

nla_put_failure:
	pr_err("not enough space in Netlink message\n");
	ret = -EMSGSIZE;

out_err:
	nlmsg_free(msg);
out:
	mutex_unlock(&__ip_vs_mutex);

	return ret;
}

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.