static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
				 struct cma_multicast *mc)
{
	struct ib_sa_mcmember_rec rec;
	struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
	ib_sa_comp_mask comp_mask;
	int ret;

	ib_addr_get_mgid(dev_addr, &rec.mgid);
	ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
				     &rec.mgid, &rec);
	if (ret)
		return ret;

	ret = cma_set_qkey(id_priv, 0);
	if (ret)
		return ret;

	cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
	rec.qkey = cpu_to_be32(id_priv->qkey);
	rdma_addr_get_sgid(dev_addr, &rec.port_gid);
	rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
	rec.join_state = 1;

	comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
		    IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
		    IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
		    IB_SA_MCMEMBER_REC_FLOW_LABEL |
		    IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;

	if (id_priv->id.ps == RDMA_PS_IPOIB)
		comp_mask |= IB_SA_MCMEMBER_REC_RATE |
			     IB_SA_MCMEMBER_REC_RATE_SELECTOR |
			     IB_SA_MCMEMBER_REC_MTU_SELECTOR |
			     IB_SA_MCMEMBER_REC_MTU |
			     IB_SA_MCMEMBER_REC_HOP_LIMIT;

	mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
						id_priv->id.port_num, &rec,
						comp_mask, GFP_KERNEL,
						cma_ib_mc_handler, mc);
	return PTR_ERR_OR_ZERO(mc->multicast.ib);
}

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.