linux-kernel - Re: [B.A.T.M.A.N.] [PATCH] batman-adv/main: Fix check on return value of rtnl_link

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Message-ID: <4059540.uxCivL65nk@sven-edge>
Date:   Mon, 24 Dec 2018 19:43:07 +0100
From:   Sven Eckelmann <sven@...fation.org>
To:     b.a.t.m.a.n@...ts.open-mesh.org
Cc:     Aditya Pakki <pakki001@....edu>,
        Marek Lindner <mareklindner@...mailbox.ch>, kjlu@....edu,
        Antonio Quartulli <a@...table.cc>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [B.A.T.M.A.N.] [PATCH] batman-adv/main: Fix check on return value of rtnl_link_register

On Monday, 24 December 2018 18.49.26 CET Aditya Pakki wrote:
[...]
> diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
> index 69c0d85bceb3..e0007f242823 100644
> --- a/net/batman-adv/main.c
> +++ b/net/batman-adv/main.c
> @@ -109,7 +109,10 @@ static int __init batadv_init(void)
>  	batadv_debugfs_init();
>  
>  	register_netdevice_notifier(&batadv_hard_if_notifier);
> -	rtnl_link_register(&batadv_link_ops);
> +	ret = rtnl_link_register(&batadv_link_ops);
> +	if (ret < 0)
> +		return ret;
> +
>  	batadv_netlink_register();

Uhm, but shouldn't the already initialized parts be unregistered/uninitialized 
in this case?

Rejecting this patch because this could cause a new bug.

Also "Fixes: " line is missing

Kind regards,
	Sven
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