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authorFlorian Westphal <fw@strlen.de>2018-08-02 21:44:40 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2018-08-16 19:37:02 +0200
commitd209df3e7f7002d9099fdb0f6df0f972b4386a63 (patch)
treeb2ded0dc8be12f0048188bbf2b0a80f01fbb353a /net
parent3e673b23b541b8e7f773b2d378d6eb99831741cd (diff)
downloadlinux-d209df3e7f7002d9099fdb0f6df0f972b4386a63.tar.bz2
netfilter: nf_tables: fix register ordering
We must register nfnetlink ops last, as that exposes nf_tables to userspace. Without this, we could theoretically get nfnetlink request before net->nft state has been initialized. Fixes: 99633ab29b213 ("netfilter: nf_tables: complete net namespace support") Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/nf_tables_api.c29
-rw-r--r--net/netfilter/nft_chain_filter.c2
2 files changed, 23 insertions, 8 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 3008f93469c4..80636cc59686 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -7273,21 +7273,36 @@ static int __init nf_tables_module_init(void)
{
int err;
- nft_chain_filter_init();
+ err = register_pernet_subsys(&nf_tables_net_ops);
+ if (err < 0)
+ return err;
+
+ err = nft_chain_filter_init();
+ if (err < 0)
+ goto err1;
err = nf_tables_core_module_init();
if (err < 0)
- return err;
+ goto err2;
- err = nfnetlink_subsys_register(&nf_tables_subsys);
+ err = register_netdevice_notifier(&nf_tables_flowtable_notifier);
if (err < 0)
- goto err;
+ goto err3;
- register_netdevice_notifier(&nf_tables_flowtable_notifier);
+ /* must be last */
+ err = nfnetlink_subsys_register(&nf_tables_subsys);
+ if (err < 0)
+ goto err4;
- return register_pernet_subsys(&nf_tables_net_ops);
-err:
+ return err;
+err4:
+ unregister_netdevice_notifier(&nf_tables_flowtable_notifier);
+err3:
nf_tables_core_module_exit();
+err2:
+ nft_chain_filter_fini();
+err1:
+ unregister_pernet_subsys(&nf_tables_net_ops);
return err;
}
diff --git a/net/netfilter/nft_chain_filter.c b/net/netfilter/nft_chain_filter.c
index ea5b7c4944f6..9d07b277b9ee 100644
--- a/net/netfilter/nft_chain_filter.c
+++ b/net/netfilter/nft_chain_filter.c
@@ -392,7 +392,7 @@ int __init nft_chain_filter_init(void)
return 0;
}
-void __exit nft_chain_filter_fini(void)
+void nft_chain_filter_fini(void)
{
nft_chain_filter_bridge_fini();
nft_chain_filter_inet_fini();