netfilter: don't panic on error while walking through the init path
Don't panic if we hit an error while adding the nf_log or pernet
netfilter support, just bail out.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Gao feng <gaofeng@cn.fujitsu.com>
diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index 07c865a..300539d 100644
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -302,17 +302,26 @@
.exit = netfilter_net_exit,
};
-void __init netfilter_init(void)
+int __init netfilter_init(void)
{
- int i, h;
+ int i, h, ret;
+
for (i = 0; i < ARRAY_SIZE(nf_hooks); i++) {
for (h = 0; h < NF_MAX_HOOKS; h++)
INIT_LIST_HEAD(&nf_hooks[i][h]);
}
- if (register_pernet_subsys(&netfilter_net_ops) < 0)
- panic("cannot create netfilter proc entry");
+ ret = register_pernet_subsys(&netfilter_net_ops);
+ if (ret < 0)
+ goto err;
- if (netfilter_log_init() < 0)
- panic("cannot initialize nf_log");
+ ret = netfilter_log_init();
+ if (ret < 0)
+ goto err_pernet;
+
+ return 0;
+err_pernet:
+ unregister_pernet_subsys(&netfilter_net_ops);
+err:
+ return ret;
}
diff --git a/net/netfilter/nf_log.c b/net/netfilter/nf_log.c
index 388656d..bd5474a 100644
--- a/net/netfilter/nf_log.c
+++ b/net/netfilter/nf_log.c
@@ -368,10 +368,7 @@
return 0;
out_sysctl:
- /* For init_net: errors will trigger panic, don't unroll on error. */
- if (!net_eq(net, &init_net))
- remove_proc_entry("nf_log", net->nf.proc_netfilter);
-
+ remove_proc_entry("nf_log", net->nf.proc_netfilter);
return ret;
}
diff --git a/net/socket.c b/net/socket.c
index 6b94633..734194d 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2612,7 +2612,9 @@
*/
#ifdef CONFIG_NETFILTER
- netfilter_init();
+ err = netfilter_init();
+ if (err)
+ goto out;
#endif
#ifdef CONFIG_NETWORK_PHY_TIMESTAMPING