netdev - Re: Uninitialized value in __sk_nulls_add_node

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Message-ID: <CAEfhGiwQe-whM8p1OuLC3WntogmC6AeLS0HPRUcTL85ii8hKmw@mail.gmail.com>
Date:   Tue, 5 Dec 2017 14:39:04 -0500
From:   Craig Gallek <kraigatgoog@...il.com>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        Alexander Potapenko <glider@...gle.com>,
        David Miller <davem@...emloft.net>,
        Networking <netdev@...r.kernel.org>
Subject: Re: Uninitialized value in __sk_nulls_add_node_rcu()

On Tue, Dec 5, 2017 at 9:18 AM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> On Tue, 2017-12-05 at 06:15 -0800, Eric Dumazet wrote:
>>
>> +     hlist_nulls_add_head_rcu(&sk->sk_nulss_node, list);
>
> Typo here, this needs sk_nulls_node of course.
>

Thanks Eric, this looks good to me.  The tail insertion is still
required in udp_lib_get_port for the second layer hash, but not here.
fwiw, reuseport_dualstack in the selftests directory verifies this
behavior.  I tried it with your patch (it still passes) and removing
the udp_lib_get_port path (to make sure it breaks when it should).

Craig