static int cm_establish_handler(struct cm_work *work)
{
	struct cm_id_private *cm_id_priv;
	int ret;

	/* See comment in cm_establish about lookup. */
	cm_id_priv = cm_acquire_id(work->local_id, work->remote_id);
	if (!cm_id_priv)
		return -EINVAL;

	spin_lock_irq(&cm_id_priv->lock);
	if (cm_id_priv->id.state != IB_CM_ESTABLISHED) {
		spin_unlock_irq(&cm_id_priv->lock);
		goto out;
	}

	ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
	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;
out:
	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.