From 5edfbd3c0697e643f179dba819a7c09375b42543 Mon Sep 17 00:00:00 2001 From: Tonghao Zhang Date: Thu, 20 Jul 2017 02:41:34 -0700 Subject: [PATCH] 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: Tonghao Zhang Signed-off-by: David S. Miller --- drivers/net/tun.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 3d4c24572ecd..32ad87345f57 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -2598,8 +2598,16 @@ static int __init tun_init(void) 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; + +err_notifier: + misc_deregister(&tun_miscdev); err_misc: rtnl_link_unregister(&tun_link_ops); err_linkops: