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Date: Wed, 5 Dec 2018 07:58:51 +0100
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Rafael David Tinoco <rafael.tinoco@linaro.org>
Cc: linux-kernel@vger.kernel.org, shuah@kernel.org,
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        Neal Cardwell <ncardwell@google.com>,
        "David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH 4.19 000/139] 4.19.7-stable review
Message-ID: <20181205065851.GA16346@kroah.com>
References: <20181204103649.950154335@linuxfoundation.org>
 <716b46ef-03da-9656-92fd-3823f31f5ce6@linaro.org>
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On Tue, Dec 04, 2018 at 07:09:46PM -0200, Rafael David Tinoco wrote:
> On 12/4/18 8:48 AM, Greg Kroah-Hartman wrote:
> > This is the start of the stable review cycle for the 4.19.7 release.
> > There are 139 patches in this series, all will be posted as a response
> > to this one.  If anyone has any issues with these being applied, please
> > let me know.
> > 
> > Responses should be made by Thu Dec  6 10:36:22 UTC 2018.
> > Anything received after that time might be too late.
> > 
> > The whole patch series can be found in one patch at:
> > 	https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.19.7-rc1.gz
> > or in the git tree and branch at:
> > 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
> > and the diffstat can be found below.
> > 
> > thanks,
> > 
> > greg k-h
> 
> During functional tests for this v4.19 release, we faced a PANIC,
> described bellow, but unlikely related to this specific v4.19 version.
> 
> First a WARN() at tcp_output.c:
> 
> tcp_send_loss_probe():
> ...
> 	/* Retransmit last segment. */
> 	if (WARN_ON(!skb))
> 		goto rearm_timer;
> ...
> 
> [  173.557528] WARNING: CPU: 1 PID: 0 at
> /srv/oe/build/tmp-rpb-glibc/work-shared/juno/kernel-source/net/ipv4/tcp_output.c:2485
> tcp_send_loss_probe+0x164/0x1e8
> [  173.571425] Modules linked in: crc32_ce crct10dif_ce fuse
> [  173.576804] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.7-rc1 #1
> [  173.583014] Hardware name: ARM Juno development board (r2) (DT)

So only this one machine saw this failure?

If you can reproduce it again, bisection would be great to do if
possible.

thanks,

greg k-h