void sock_update_classid(struct sock *sk)
{
	u32 classid;

	rcu_read_lock();  /* doing current task, which cannot vanish. */
	classid = task_cls_classid(current);
	rcu_read_unlock();
	if (classid && classid != sk->sk_classid)
		sk->sk_classid = classid;
}

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.