netdev - Re: [PATCH net] tcp: clear tp->retrans_stamp in tcp_finish

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Message-ID: <CADVnQykaeDhatr1WUtZjtv6zY3AFM-Ea3z5i5iw1vvfd3yfamQ@mail.gmail.com>
Date:   Wed, 19 Dec 2018 17:05:39 -0500
From:   Neal Cardwell <ncardwell@...gle.com>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        Soheil Hassas Yeganeh <soheil@...gle.com>,
        Yuchung Cheng <ycheng@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [PATCH net] tcp: clear tp->retrans_stamp in tcp_finish_connect()

On Wed, Dec 19, 2018 at 4:50 PM Eric Dumazet <edumazet@...gle.com> wrote:
>
> tcp_connect() does :
>
>      tp->retrans_stamp = tcp_time_stamp(tp);
>
> When 3WHS completes, we need to clear retrans_stamp otherwise
> various things can break.
>
> This bug became more visible after commit b701a99e431d ("tcp: Add
> tcp_clamp_rto_to_user_timeout() helper to improve accuracy"), but
> predates git history.
>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Acked-by: Soheil Hassas Yeganeh <soheil@...gle.com>
> ---

Acked-by: Neal Cardwell <ncardwell@...gle.com>

Thanks!

neal