netdev - Re: [PATCHv2 net] bonding: fix missed rcu protection

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Date:   Tue, 17 May 2022 11:25:41 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Hangbin Liu <liuhangbin@...il.com>, netdev@...r.kernel.org,
        Jay Vosburgh <j.vosburgh@...il.com>,
        Veaceslav Falico <vfalico@...il.com>,
        Andy Gospodarek <andy@...yhouse.net>,
        "David S . Miller" <davem@...emloft.net>,
        David Ahern <dsahern@...il.com>,
        Jonathan Toppins <jtoppins@...hat.com>,
        Eric Dumazet <eric.dumazet@...il.com>,
        Paolo Abeni <pabeni@...hat.com>,
        syzbot+92beb3d46aab498710fa@...kaller.appspotmail.com,
        Vladimir Oltean <vladimir.oltean@....com>
Subject: Re: [PATCHv2 net] bonding: fix missed rcu protection

On Tue, 17 May 2022 10:54:45 -0700
Jakub Kicinski <kuba@...nel.org> wrote:

> dev_hold() and dev_put() can take NULL these days, for better or worse.
> I think the code simplification is worth making use of that, even tho
> it will make the backport slightly more tricky (perhaps make a not of
> this in the commit message).

Since that is so, would be worth having coccinelle script to cleanup
existing code.

See scripts/coccinelle/ifnullfree.cocci for similar example.