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From: Oleksandr Natalenko <oleksandr@natalenko.name>
To: Neal Cardwell <ncardwell@google.com>
Cc: Yuchung Cheng <ycheng@google.com>, netdev <netdev@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Patrick McHardy <kaber@trash.net>,
        Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
        James Morris <jmorris@namei.org>,
        Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
        "David S. Miller" <davem@davemloft.net>
Subject: Re: [REGRESSION] tcp/ipv4: kernel panic because of (possible) division by zero
Date: Sun, 10 Jan 2016 16:57:00 +0200
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I use YeAH. But YeAH code wasn't touched between 4.2 and 4.3.

On неділя, 10 січня 2016 р. 09:48:20 EET Neal Cardwell wrote:
> On Sun, Jan 10, 2016 at 5:23 AM, Oleksandr Natalenko
> 
> <oleksandr@natalenko.name> wrote:
> > With the patch queued for upstream and ECN enabled I get WARN_ON_ONCE()
> > triggered. Here is the stacktrace:
> > 
> > https://gist.github.com/89203e77bfcb051f269a
> > 
> > It seems that tp->prior_cwnd is zero.
> 
> Hmm. Interesting. Can you please confirm that you are using the cubic
> congestion control module?
> 
> thanks,
> neal