netfilter: nf_tables: fix error path in the init functions

We have to unregister chain type if this fails to register netns.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 7 insertions, 1 deletions

diff --git a/net/ipv4/netfilter/nf_tables_ipv4.c b/net/ipv4/netfilter/nf_tables_ipv4.c
index fec163a6ac38..6820c8c40842 100644
--- a/net/ipv4/netfilter/nf_tables_ipv4.c
+++ b/net/ipv4/netfilter/nf_tables_ipv4.c
@@ -105,8 +105,14 @@ static const struct nf_chain_type filter_ipv4 = {
 
 static int __init nf_tables_ipv4_init(void)
 {
+        int ret;
+
         nft_register_chain_type(&filter_ipv4);
-        return register_pernet_subsys(&nf_tables_ipv4_net_ops);
+        ret = register_pernet_subsys(&nf_tables_ipv4_net_ops);
+        if (ret < 0)
+                nft_unregister_chain_type(&filter_ipv4);
+
+        return ret;
 }
 
 static void __exit nf_tables_ipv4_exit(void)