int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, u32 portid,
		      u32 group, gfp_t allocation)
{
	return netlink_broadcast_filtered(ssk, skb, portid, group, allocation,
		NULL, NULL);
}

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.