linux-kernel - Re: [PATCH] netlink: do not proceed if dump's start() errs

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Date:   Wed, 27 Sep 2017 15:05:14 +0200
From:   Johannes Berg <johannes@...solutions.net>
To:     "Jason A. Donenfeld" <Jason@...c4.com>,
        David Miller <davem@...emloft.net>,
        Netdev <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     stable@...r.kernel.org
Subject: Re: [PATCH] netlink: do not proceed if dump's start() errs

On Wed, 2017-09-27 at 14:50 +0200, Jason A. Donenfeld wrote:
> On Wed, Sep 27, 2017 at 2:39 PM, Jason A. Donenfeld <Jason@...c4.com>
> wrote:
> > -       if (cb->start)
> > -               cb->start(cb);
> > +       if (cb->start) {
> > +               ret = cb->start(cb);
> > +               if (ret)
> 
> I need to sock_put(sk); before returning. I'll fix this for v2, but
> will for additional comments in case anybody has some.

I guess you could change it to

if (cb->start)
	ret = cb->start(cb);
if (!ret)
	ret = netlink_dump(sk);

johannes