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mctp: check register_netdevice_notifier() error in mctp_device_init()

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mctp_device_init() handles errors from rtnl_af_register() and
rtnl_register_many(), but ignores the return value of
register_netdevice_notifier(). If notifier registration fails, init can
still return success while the module is only partially initialized.

Check the notifier registration error and fail module init early.

Fixes: 583be982d9 ("mctp: Add device handling and netlink interface")
Signed-off-by: Minhong He <heminhong@kylinos.cn>
Link: https://patch.msgid.link/20260720072518.112614-1-heminhong@kylinos.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Minhong He 2026-07-20 15:25:18 +08:00 committed by Jakub Kicinski
parent c3f2fc231a
commit d9a33cadc7
1 changed files with 3 additions and 1 deletions
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4
net/mctp/device.c
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@ -536,7 +536,9 @@ int __init mctp_device_init(void)
{
int err;
register_netdevice_notifier(&mctp_dev_nb);
err = register_netdevice_notifier(&mctp_dev_nb);
if (err)
return err;
err = rtnl_af_register(&mctp_af_ops);
if (err)