netdev - Re: net/tcp: warning in tcp_try_coalesce/skb_try

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Message-ID: <1486042812.13103.27.camel@edumazet-glaptop3.roam.corp.google.com>
Date:   Thu, 02 Feb 2017 05:40:12 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        James Morris <jmorris@...ei.org>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Patrick McHardy <kaber@...sh.net>,
        netdev <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Kostya Serebryany <kcc@...gle.com>,
        syzkaller <syzkaller@...glegroups.com>
Subject: Re: net/tcp: warning in tcp_try_coalesce/skb_try_coalesce

On Thu, 2017-02-02 at 13:59 +0100, Dmitry Vyukov wrote:

> 
> Right, I can confirm that this is not happening on net-next tip
> (62e13097c46c69dbd7544ab2cd585ccf48f360a4).
> I reproduced it on a random month old commit on net-next, though
> (23a8ed4a624324dc696c328f09bd502c4a3816f0). Let's consider that this
> is accidentally fixed by something in that range.

This also might depend on the .config 

I tried 23a8ed4a624324dc696c328f09bd502c4a3816f0 and could not trigger
the warning .

Thanks.