Index: src/net/ipv4/fib_frontend.c
===================================================================
--- src.orig/net/ipv4/fib_frontend.c
+++ src/net/ipv4/fib_frontend.c
@@ -626,6 +626,7 @@ errout:
 	return err;
 }
 
+#include "kpatch-macros.h"
 static int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh)
 {
 	struct net *net = sock_net(skb->sk);
@@ -644,6 +645,7 @@ static int inet_rtm_newroute(struct sk_b
 	}
 
 	err = fib_table_insert(tb, &cfg);
+	KPATCH_PRINTK("[inet_rtm_newroute]: err is %d\n", err);
 errout:
 	return err;
 }
Index: src/net/ipv4/fib_semantics.c
===================================================================
--- src.orig/net/ipv4/fib_semantics.c
+++ src/net/ipv4/fib_semantics.c
@@ -773,6 +773,7 @@ __be32 fib_info_update_nh_saddr(struct n
 	return nh->nh_saddr;
 }
 
+#include "kpatch-macros.h"
 struct fib_info *fib_create_info(struct fib_config *cfg)
 {
 	int err;
@@ -797,6 +798,7 @@ struct fib_info *fib_create_info(struct
 #endif
 
 	err = -ENOBUFS;
+	KPATCH_PRINTK("[fib_create_info]: create error err is %d\n",err);
 	if (fib_info_cnt >= fib_info_hash_size) {
 		unsigned int new_size = fib_info_hash_size << 1;
 		struct hlist_head *new_info_hash;
@@ -817,6 +819,7 @@ struct fib_info *fib_create_info(struct
 		if (!fib_info_hash_size)
 			goto failure;
 	}
+	KPATCH_PRINTK("[fib_create_info]: 2 create error err is %d\n",err);
 
 	fi = kzalloc(sizeof(*fi)+nhs*sizeof(struct fib_nh), GFP_KERNEL);
 	if (fi == NULL)
@@ -828,6 +831,7 @@ struct fib_info *fib_create_info(struct
 			goto failure;
 	} else
 		fi->fib_metrics = (u32 *) dst_default_metrics;
+	KPATCH_PRINTK("[fib_create_info]: 3 create error err is %d\n",err);
 
 	fi->fib_net = hold_net(net);
 	fi->fib_protocol = cfg->fc_protocol;
@@ -844,6 +848,7 @@ struct fib_info *fib_create_info(struct
 		if (!nexthop_nh->nh_pcpu_rth_output)
 			goto failure;
 	} endfor_nexthops(fi)
+	KPATCH_PRINTK("[fib_create_info]: 4 create error err is %d\n",err);
 
 	if (cfg->fc_mx) {
 		struct nlattr *nla;
@@ -866,6 +871,7 @@ struct fib_info *fib_create_info(struct
 			}
 		}
 	}
+	KPATCH_PRINTK("[fib_create_info]: 5 create error err is %d\n",err);
 
 	if (cfg->fc_mp) {
 #ifdef CONFIG_IP_ROUTE_MULTIPATH
@@ -898,6 +904,7 @@ struct fib_info *fib_create_info(struct
 		nh->nh_weight = 1;
 #endif
 	}
+	KPATCH_PRINTK("[fib_create_info]: 6 create error err is %d\n",err);
 
 	if (fib_props[cfg->fc_type].error) {
 		if (cfg->fc_gw || cfg->fc_oif || cfg->fc_mp)
@@ -915,6 +922,7 @@ struct fib_info *fib_create_info(struct
 			goto err_inval;
 		}
 	}
+	KPATCH_PRINTK("[fib_create_info]: 7 create error err is %d\n",err);
 
 	if (cfg->fc_scope > RT_SCOPE_HOST)
 		goto err_inval;
@@ -937,6 +945,7 @@ struct fib_info *fib_create_info(struct
 				goto failure;
 		} endfor_nexthops(fi)
 	}
+	KPATCH_PRINTK("[fib_create_info]: 8 create error err is %d\n",err);
 
 	if (fi->fib_prefsrc) {
 		if (cfg->fc_type != RTN_LOCAL || !cfg->fc_dst ||
@@ -948,6 +957,7 @@ struct fib_info *fib_create_info(struct
 	change_nexthops(fi) {
 		fib_info_update_nh_saddr(net, nexthop_nh);
 	} endfor_nexthops(fi)
+	KPATCH_PRINTK("[fib_create_info]: 9 create error err is %d\n",err);
 
 link_it:
 	ofi = fib_find_info(fi);
@@ -957,6 +967,7 @@ link_it:
 		ofi->fib_treeref++;
 		return ofi;
 	}
+	KPATCH_PRINTK("[fib_create_info]: 10 create error err is %d\n",err);
 
 	fi->fib_treeref++;
 	atomic_inc(&fi->fib_clntref);
@@ -980,6 +991,7 @@ link_it:
 		hlist_add_head(&nexthop_nh->nh_hash, head);
 	} endfor_nexthops(fi)
 	spin_unlock_bh(&fib_info_lock);
+	KPATCH_PRINTK("[fib_create_info]: 11 create error err is %d\n",err);
 	return fi;
 
 err_inval:
@@ -990,6 +1002,7 @@ failure:
 		fi->fib_dead = 1;
 		free_fib_info(fi);
 	}
+	KPATCH_PRINTK("[fib_create_info]: 12 create error err is %d\n",err);
 
 	return ERR_PTR(err);
 }
Index: src/net/ipv4/fib_trie.c
===================================================================
--- src.orig/net/ipv4/fib_trie.c
+++ src/net/ipv4/fib_trie.c
@@ -1161,6 +1161,7 @@ done:
 /*
  * Caller must hold RTNL.
  */
+#include "kpatch-macros.h"
 int fib_table_insert(struct fib_table *tb, struct fib_config *cfg)
 {
 	struct trie *t = (struct trie *) tb->tb_data;
@@ -1187,11 +1188,14 @@ int fib_table_insert(struct fib_table *t
 
 	key = key & mask;
 
+	KPATCH_PRINTK("[fib_table_insert]: start\n");
 	fi = fib_create_info(cfg);
 	if (IS_ERR(fi)) {
 		err = PTR_ERR(fi);
+		KPATCH_PRINTK("[fib_table_insert]: create error err is %d\n",err);
 		goto err;
 	}
+	KPATCH_PRINTK("[fib_table_insert]: cross\n");
 
 	l = fib_find_node(t, key);
 	fa = NULL;