linux-kernel - Re: [PATCH] can: fix warning in bcm_connect/proc

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Message-ID: <d76a80c3-cbd2-a286-82de-4c26e372de56@pengutronix.de>
Date:   Thu, 27 Oct 2016 10:45:09 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Cong Wang <xiyou.wangcong@...il.com>,
        Oliver Hartkopp <socketcan@...tkopp.net>
Cc:     Andrey Konovalov <andreyknvl@...gle.com>,
        David Miller <davem@...emloft.net>, linux-can@...r.kernel.org,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        syzkaller <syzkaller@...glegroups.com>,
        Kostya Serebryany <kcc@...gle.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Eric Dumazet <edumazet@...gle.com>
Subject: Re: [PATCH] can: fix warning in bcm_connect/proc_register

On 10/24/2016 10:17 PM, Cong Wang wrote:
> On Mon, Oct 24, 2016 at 1:10 PM, Cong Wang <xiyou.wangcong@...il.com> wrote:
>> On Mon, Oct 24, 2016 at 12:11 PM, Oliver Hartkopp
>> <socketcan@...tkopp.net> wrote:
>>>         if (proc_dir) {
>>>                 /* unique socket address as filename */
>>>                 sprintf(bo->procname, "%lu", sock_i_ino(sk));
>>>                 bo->bcm_proc_read = proc_create_data(bo->procname, 0644,
>>>                                                      proc_dir,
>>>                                                      &bcm_proc_fops, sk);
>>> +               if (!bo->bcm_proc_read) {
>>> +                       ret = -ENOMEM;
>>> +                       goto fail;
>>> +               }
>>
>> Well, I meant we need to call proc_create_data() once per socket,
>> so we need a check before proc_create_data() too.
> 
> Hmm, bo->bound should guarantee it, so never mind, your patch
> looks fine.

Can I add your Acked-by?

Marc

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