diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c
index 9c06b9f86ad4..c39b6a994133 100644
--- a/net/netfilter/nf_conntrack_helper.c
+++ b/net/netfilter/nf_conntrack_helper.c
@@ -21,6 +21,7 @@
 #include <linux/kernel.h>
 #include <linux/netdevice.h>
 #include <linux/rculist.h>
+#include <linux/rtnetlink.h>
 
 #include <net/netfilter/nf_conntrack.h>
 #include <net/netfilter/nf_conntrack_l3proto.h>
@@ -167,10 +168,12 @@ void nf_conntrack_helper_unregister(struct nf_conntrack_helper *me)
 	 */
 	synchronize_rcu();
 
+	rtnl_lock();
 	spin_lock_bh(&nf_conntrack_lock);
 	for_each_net(net)
 		__nf_conntrack_helper_unregister(me, net);
 	spin_unlock_bh(&nf_conntrack_lock);
+	rtnl_unlock();
 }
 EXPORT_SYMBOL_GPL(nf_conntrack_helper_unregister);
 
diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c
index a59a307e685d..592d73344d46 100644
--- a/net/netfilter/nf_conntrack_proto.c
+++ b/net/netfilter/nf_conntrack_proto.c
@@ -22,6 +22,7 @@
 #include <linux/notifier.h>
 #include <linux/kernel.h>
 #include <linux/netdevice.h>
+#include <linux/rtnetlink.h>
 
 #include <net/netfilter/nf_conntrack.h>
 #include <net/netfilter/nf_conntrack_l3proto.h>
@@ -221,8 +222,10 @@ void nf_conntrack_l3proto_unregister(struct nf_conntrack_l3proto *proto)
 	synchronize_rcu();
 
 	/* Remove all contrack entries for this protocol */
+	rtnl_lock();
 	for_each_net(net)
 		nf_ct_iterate_cleanup(net, kill_l3proto, proto);
+	rtnl_unlock();
 }
 EXPORT_SYMBOL_GPL(nf_conntrack_l3proto_unregister);
 
@@ -333,8 +336,10 @@ void nf_conntrack_l4proto_unregister(struct nf_conntrack_l4proto *l4proto)
 	synchronize_rcu();
 
 	/* Remove all contrack entries for this protocol */
+	rtnl_lock();
 	for_each_net(net)
 		nf_ct_iterate_cleanup(net, kill_l4proto, l4proto);
+	rtnl_unlock();
 }
 EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_unregister);