netdev - Re: [PATCH net] net_sched: sch_mqprio: handle return value of mqprio_queue

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Message-ID: <9812dba9-e7c5-c0c0-7065-1cf5f04e7958@oracle.com>
Date:   Tue, 11 Jun 2019 08:27:41 +0800
From:   Jacob Wen <jian.w.wen@...cle.com>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: [PATCH net] net_sched: sch_mqprio: handle return value of
 mqprio_queue_get

Hi Cong,

This was detected by a tool.

Thanks for the review :)

I will abandon the patch.

On 6/11/19 2:19 AM, Cong Wang wrote:
> On Sun, Jun 9, 2019 at 11:41 PM Jacob Wen <jian.w.wen@...cle.com> wrote:
>> It may return NULL thus we can't ignore it.
> How is this possible? All of the callers should have validated
> the 'cl' before calling this, for example by calling ->find().
>
> I don't see it is possible to be NULL at this point.
>
> Did you see a real crash? If so, please put the full stack trace
> in your changelog.
>
> Thanks!