netdev - Re: [PATCH net] sch_hhf: fix null pointer dereference on init failure

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Message-ID: <CAM_iQpWN6bubnnFfqoZeiuH5NF3tpQ7nb91CBp09Yw-NJzRcng@mail.gmail.com>
Date:   Tue, 29 Aug 2017 18:24:44 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Roopa Prabhu <roopa@...ulusnetworks.com>
Subject: Re: [PATCH net] sch_hhf: fix null pointer dereference on init failure

On Tue, Aug 29, 2017 at 12:02 PM, Nikolay Aleksandrov
<nikolay@...ulusnetworks.com> wrote:
> First I did it with the check in the for () conditional, but this is more
> visible and explicit. Let me know if you'd like the shorter version. :-)

Or, if you want to make the patch size smaller, just check NULL
before for():

if (!q->hh_flows)
    return;

for (...)

Up to you, I have no strong opinion here, slightly prefer a smaller
one for backport.