diff --git a/include/net/netfilter/nf_conntrack_extend.h b/include/net/netfilter/nf_conntrack_extend.h
index 2dcf317..354cccb9 100644
--- a/include/net/netfilter/nf_conntrack_extend.h
+++ b/include/net/netfilter/nf_conntrack_extend.h
@@ -66,13 +66,15 @@ static inline void nf_ct_ext_destroy(struct nf_conn *ct)
 		__nf_ct_ext_destroy(ct);
 }
 
+void __nf_ct_ext_free_rcu(struct rcu_head *head);
+
 /* Free operation. If you want to free a object referred from private area,
  * please implement __nf_ct_ext_free() and call it.
  */
 static inline void nf_ct_ext_free(struct nf_conn *ct)
 {
 	if (ct->ext)
-		kfree(ct->ext);
+		call_rcu(&ct->ext->rcu, __nf_ct_ext_free_rcu);
 }
 
 /* Add this type, returns pointer to data or NULL. */
diff --git a/net/netfilter/nf_conntrack_extend.c b/net/netfilter/nf_conntrack_extend.c
index 80a23ed..3a47b76 100644
--- a/net/netfilter/nf_conntrack_extend.c
+++ b/net/netfilter/nf_conntrack_extend.c
@@ -68,11 +68,12 @@ nf_ct_ext_create(struct nf_ct_ext **ext, enum nf_ct_ext_id id, gfp_t gfp)
 	return (void *)(*ext) + off;
 }
 
-static void __nf_ct_ext_free_rcu(struct rcu_head *head)
+void __nf_ct_ext_free_rcu(struct rcu_head *head)
 {
 	struct nf_ct_ext *ext = container_of(head, struct nf_ct_ext, rcu);
 	kfree(ext);
 }
+EXPORT_SYMBOL_GPL(__nf_ct_ext_free_rcu);
 
 void *__nf_ct_ext_add(struct nf_conn *ct, enum nf_ct_ext_id id, gfp_t gfp)
 {