netfilter: Add the missed return value check of register_netdevice_notifier
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>
diff --git a/net/netfilter/xt_TEE.c b/net/netfilter/xt_TEE.c
index 6e57a39..0471db4 100644
--- a/net/netfilter/xt_TEE.c
+++ b/net/netfilter/xt_TEE.c
@@ -89,6 +89,8 @@
return -EINVAL;
if (info->oif[0]) {
+ int ret;
+
if (info->oif[sizeof(info->oif)-1] != '\0')
return -EINVAL;
@@ -101,7 +103,11 @@
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;