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net/sched: cbs: Fix error path of cbs_module_init

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[ Upstream commit 45d5cb137c3638b3a310f41b31d8e79daf647f14 ]

If register_qdisc fails, we should unregister
netdevice notifier.

Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: e0a7683d30e9 ("net/sched: cbs: fix port_rate miscalculation")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
YueHaibing 2019-06-21 21:44:37 +08:00 committed by Greg Kroah-Hartman
parent 9b1b59b540
commit 67da9350b3
1 changed files with 7 additions and 2 deletions
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9
net/sched/sch_cbs.c
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@ -552,12 +552,17 @@ static struct notifier_block cbs_device_notifier = {
static int __init cbs_module_init(void) static int __init cbs_module_init(void)
{ {
int err = register_netdevice_notifier(&cbs_device_notifier); int err;
err = register_netdevice_notifier(&cbs_device_notifier);
if (err) if (err)
return err; return err;
return register_qdisc(&cbs_qdisc_ops); err = register_qdisc(&cbs_qdisc_ops);
if (err)
unregister_netdevice_notifier(&cbs_device_notifier);
return err;
} }
static void __exit cbs_module_exit(void) static void __exit cbs_module_exit(void)