static int cm_lap_handler(struct cm_work *work)
{
	struct cm_id_private *cm_id_priv;
	struct cm_lap_msg *lap_msg;
	struct ib_cm_lap_event_param *param;
	struct ib_mad_send_buf *msg = NULL;
	int ret;

	/* todo: verify LAP request and send reject APR if invalid. */
	lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad;
	cm_id_priv = cm_acquire_id(lap_msg->remote_comm_id,
				   lap_msg->local_comm_id);
	if (!cm_id_priv)
		return -EINVAL;

	param = &work->cm_event.param.lap_rcvd;
	param->alternate_path = &work->path[0];
	cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg);
	work->cm_event.private_data = &lap_msg->private_data;

	spin_lock_irq(&cm_id_priv->lock);
	if (cm_id_priv->id.state != IB_CM_ESTABLISHED)
		goto unlock;

	switch (cm_id_priv->id.lap_state) {
	case IB_CM_LAP_UNINIT:
	case IB_CM_LAP_IDLE:
		break;
	case IB_CM_MRA_LAP_SENT:
		atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
				counter[CM_LAP_COUNTER]);
		if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg))
			goto unlock;

		cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv,
			      CM_MSG_RESPONSE_OTHER,
			      cm_id_priv->service_timeout,
			      cm_id_priv->private_data,
			      cm_id_priv->private_data_len);
		spin_unlock_irq(&cm_id_priv->lock);

		if (ib_post_send_mad(msg, NULL))
			cm_free_msg(msg);
		goto deref;
	case IB_CM_LAP_RCVD:
		atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
				counter[CM_LAP_COUNTER]);
		goto unlock;
	default:
		goto unlock;
	}

	cm_id_priv->id.lap_state = IB_CM_LAP_RCVD;
	cm_id_priv->tid = lap_msg->hdr.tid;
	cm_init_av_for_response(work->port, work->mad_recv_wc->wc,
				work->mad_recv_wc->recv_buf.grh,
				&cm_id_priv->av);
	cm_init_av_by_path(param->alternate_path, &cm_id_priv->alt_av);
	ret = atomic_inc_and_test(&cm_id_priv->work_count);
	if (!ret)
		list_add_tail(&work->list, &cm_id_priv->work_list);
	spin_unlock_irq(&cm_id_priv->lock);

	if (ret)
		cm_process_work(cm_id_priv, work);
	else
		cm_deref_id(cm_id_priv);
	return 0;

unlock:	spin_unlock_irq(&cm_id_priv->lock);
deref:	cm_deref_id(cm_id_priv);
	return -EINVAL;
}

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.