Commit 5edfbd3c authored by Tonghao Zhang's avatar Tonghao Zhang Committed by David S. Miller

tun/tap: Add the missed return value check of register_netdevice_notifier

There is some codes of tun/tap module which did not check the return
value of register_netdevice_notifier. Add the check now.
Signed-off-by: default avatarTonghao Zhang <xiangxia.m.yue@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6c7fce6f
...@@ -2598,8 +2598,16 @@ static int __init tun_init(void) ...@@ -2598,8 +2598,16 @@ static int __init tun_init(void)
goto err_misc; goto err_misc;
} }
register_netdevice_notifier(&tun_notifier_block); ret = register_netdevice_notifier(&tun_notifier_block);
if (ret) {
pr_err("Can't register netdevice notifier\n");
goto err_notifier;
}
return 0; return 0;
err_notifier:
misc_deregister(&tun_miscdev);
err_misc: err_misc:
rtnl_link_unregister(&tun_link_ops); rtnl_link_unregister(&tun_link_ops);
err_linkops: err_linkops:
......
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