static __net_exit void dccp_net_exit(struct net *net)
{
	nf_ct_l4proto_pernet_unregister(net, &dccp_proto6);
	nf_ct_l4proto_pernet_unregister(net, &dccp_proto4);
}

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.