ipvlan: check the value of module parameter ipvlan_default_mode

euler inclusion
category: bugfix
bugzilla: 9511
CVE: NA

-------------------------------------------------

In commit <7a0f243de9e2> "ipvlan: Introduce l2e mode", we introduced
ipvlan_default_mode as a way to enable the ipvlan's default mode.
Howerver, we didn't check the value of this module parameter.

This patch first fixed out a spelling error of "mode", and then add
the value check for ipvlan_default_mode.
Signed-off-by: NKeefe LIU <liuqifa@huawei.com>
Reviewed-by: NWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/net/ipvlan/ipvlan_main.c

@@ -1074,6 +1074,10 @@ static int __init ipvlan_init_module(void)
 {
 	int err;
 
+	if (ipvlan_default_mode >= IPVLAN_MODE_MAX ||
+	    ipvlan_default_mode < IPVLAN_MODE_L2)
+		return -EINVAL;
+
 	ipvlan_init_secret();
 	register_netdevice_notifier(&ipvlan_notifier_block);
 #if IS_ENABLED(CONFIG_IPV6)