diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index ef4e76e5aef9..f61233ad6ef5 100644
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -279,6 +279,14 @@ static struct nf_hook_entries __rcu **
 nf_hook_entry_head(struct net *net, int pf, unsigned int hooknum,
 		   struct net_device *dev)
 {
+	printk("%d, %d, %d, %d, %d, %d, %d, %d, %s\n", pf, 
+			ARRAY_SIZE(net->nf.hooks_arp), 
+			ARRAY_SIZE(net->nf.hooks_bridge),
+			NF_INET_INGRESS,
+			ARRAY_SIZE(net->nf.hooks_ipv4),
+			ARRAY_SIZE(net->nf.hooks_ipv6),
+			NF_NETDEV_EGRESS,
+			hooknum, __func__);
 	switch (pf) {
 	case NFPROTO_NETDEV:
 		break;
@@ -473,10 +481,13 @@ static bool nf_remove_net_hook(struct nf_hook_entries *old,
 	struct nf_hook_ops **orig_ops;
 	unsigned int i;
 
+	printk("%d, %p, %p, %d, %s\n", IS_ERR(old), old, unreg, old->num_hook_entries, __func__);
 	orig_ops = nf_hook_entries_get_hook_ops(old);
 	for (i = 0; i < old->num_hook_entries; i++) {
-		if (orig_ops[i] != unreg)
+		if (orig_ops[i] != unreg) {
+			printk("%p, %d, %s\n", orig_ops[i], i, __func__);
 			continue;
+		}
 		WRITE_ONCE(old->hooks[i].hook, accept_all);
 		WRITE_ONCE(orig_ops[i], (void *)&dummy_ops);
 		return true;
@@ -514,6 +525,8 @@ static void __nf_unregister_net_hook(struct net *net, int pf,
 #endif
 		nf_static_key_dec(reg, pf);
 	} else {
+		if (IS_ERR(p))
+			return;
 		WARN_ONCE(1, "hook not found, pf %d num %d", pf, reg->hooknum);
 	}