From 71b2e5f5ca3b163b90e487a96fd0cabbaf16792b Mon Sep 17 00:00:00 2001
From: Ken-ichirou MATSUZAWA <chamaken@gmail.com>
Date: Tue, 5 Jan 2016 09:32:59 +0900
Subject: [PATCH] netfilter: nfnetlink_queue: autoload nf_conntrack_netlink
 module NFQA_CFG_F_CONNTRACK config flag

This patch enables to load nf_conntrack_netlink module if
NFQA_CFG_F_CONNTRACK config flag is specified.

Signed-off-by: Ken-ichirou MATSUZAWA <chamas@h4.dion.ne.jp>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nfnetlink_queue.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index c1f6df4cfe88..1d3936587ace 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -1147,6 +1147,17 @@ static int nfqnl_recv_config(struct net *net, struct sock *ctnl,
 		if (flags & mask & NFQA_CFG_F_SECCTX)
 			return -EOPNOTSUPP;
 #endif
+		if ((flags & mask & NFQA_CFG_F_CONNTRACK) &&
+		    !rcu_access_pointer(nfnl_ct_hook)) {
+#ifdef CONFIG_MODULES
+			nfnl_unlock(NFNL_SUBSYS_QUEUE);
+			request_module("ip_conntrack_netlink");
+			nfnl_lock(NFNL_SUBSYS_QUEUE);
+			if (rcu_access_pointer(nfnl_ct_hook))
+				return -EAGAIN;
+#endif
+			return -EOPNOTSUPP;
+		}
 	}
 
 	rcu_read_lock();
-- 
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