netfilter: Add the missed return value check of nft_register_chain_type

There are some codes of netfilter module which did not check the return
value of nft_register_chain_type. Add the checks now.

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 13 insertions, 5 deletions

diff --git a/net/bridge/netfilter/nf_tables_bridge.c b/net/bridge/netfilter/nf_tables_bridge.c
index 06f0f81456a0..97afdc0744e6 100644
--- a/net/bridge/netfilter/nf_tables_bridge.c
+++ b/net/bridge/netfilter/nf_tables_bridge.c
@@ -139,12 +139,20 @@ static int __init nf_tables_bridge_init(void)
 	int ret;
 
 	nf_register_afinfo(&nf_br_afinfo);
-	nft_register_chain_type(&filter_bridge);
+	ret = nft_register_chain_type(&filter_bridge);
+	if (ret < 0)
+		goto err1;
+
 	ret = register_pernet_subsys(&nf_tables_bridge_net_ops);
-	if (ret < 0) {
-		nft_unregister_chain_type(&filter_bridge);
-		nf_unregister_afinfo(&nf_br_afinfo);
-	}
+	if (ret < 0)
+		goto err2;
+
+	return ret;
+
+err2:
+	nft_unregister_chain_type(&filter_bridge);
+err1:
+	nf_unregister_afinfo(&nf_br_afinfo);
 	return ret;
 }