From: Vegard Nossum <vegard.nossum@gmail.com>
Subject: Re: kernel BUG at fs/buffer.c:3102! (nbd disc.)
Date: Wed, 3 May 2017 11:42:57 +0200
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Cc: Ext4 Developers List <linux-ext4@vger.kernel.org>
To: Sverd Johnsen <sverd.johnsen@googlemail.com>
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On 3 May 2017 at 11:27, Sverd Johnsen <sverd.johnsen@googlemail.com> wrote:
> Hi. used ext4 via nbd and the client died on me because of a silly
> mistake. Got something in dmesg. Not sure if this is even a "real" bug
> or just sort of expected to happen in this scenario or not but I
> figure i would post it anyway.
>
[...]
> kernel: Aborting journal on device nbd0-8.
> kernel: ------------[ cut here ]------------
> kernel: kernel BUG at fs/buffer.c:3102!

Hi,

I'm thinking this was probably fixed in v4.11 by

commit abbbdf12497d36b001e0865bc5bc6cc363f3a5e1
Author: Ratna Manoj Bolla <manoj.br@gmail.com>
Date:   Fri Mar 24 14:08:29 2017 -0400

    nbd: replace kill_bdev() with __invalidate_device()


Vegard