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netfilter: Add the missed return value check of register_netdevice_notifier

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

Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Gao Feng 2016-09-09 23:25:09 +08:00 committed by Pablo Neira Ayuso
parent cf71c03edf
commit 4e6577de71
3 changed files with 28 additions and 7 deletions
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16
net/netfilter/nf_tables_netdev.c
View File

@ -151,13 +151,21 @@ static int __init nf_tables_netdev_init(void)
nft_register_chain_type(&nft_filter_chain_netdev);
ret = register_pernet_subsys(&nf_tables_netdev_net_ops);
if (ret < 0) {
if (ret)
goto err1;
ret = register_netdevice_notifier(&nf_tables_netdev_notifier);
if (ret)
goto err2;
return 0;
err2:
unregister_pernet_subsys(&nf_tables_netdev_net_ops);
err1:
nft_unregister_chain_type(&nft_filter_chain_netdev);
return ret;
}
register_netdevice_notifier(&nf_tables_netdev_notifier);
return 0;
}
static void __exit nf_tables_netdev_exit(void)
{

9
net/netfilter/nfnetlink_queue.c
View File

@ -1522,9 +1522,16 @@ static int __init nfnetlink_queue_init(void)
goto cleanup_netlink_notifier;
}
register_netdevice_notifier(&nfqnl_dev_notifier);
status = register_netdevice_notifier(&nfqnl_dev_notifier);
if (status < 0) {
pr_err("nf_queue: failed to register netdevice notifier\n");
goto cleanup_netlink_subsys;
}
return status;
cleanup_netlink_subsys:
nfnetlink_subsys_unregister(&nfqnl_subsys);
cleanup_netlink_notifier:
netlink_unregister_notifier(&nfqnl_rtnl_notifier);
unregister_pernet_subsys(&nfnl_queue_net_ops);

8
net/netfilter/xt_TEE.c
View File

@ -89,6 +89,8 @@ static int tee_tg_check(const struct xt_tgchk_param *par)
return -EINVAL;
if (info->oif[0]) {
int ret;
if (info->oif[sizeof(info->oif)-1] != '\0')
return -EINVAL;
@ -101,7 +103,11 @@ static int tee_tg_check(const struct xt_tgchk_param *par)
priv->notifier.notifier_call = tee_netdev_event;
info->priv = priv;
register_netdevice_notifier(&priv->notifier);
ret = register_netdevice_notifier(&priv->notifier);
if (ret) {
kfree(priv);
return ret;
}
} else
info->priv = NULL;