linux-ext4 - Re: kernel BUG at fs/buffer.c:3102! (nbd disc.)

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Message-ID: <CAOMGZ=EgYJF-LGBQMi38GDOV9fQLUYO4tYmeYdkgrAJAGrX5UQ@mail.gmail.com>
Date:   Wed, 3 May 2017 11:42:57 +0200
From:   Vegard Nossum <vegard.nossum@...il.com>
To:     Sverd Johnsen <sverd.johnsen@...glemail.com>
Cc:     Ext4 Developers List <linux-ext4@...r.kernel.org>
Subject: Re: kernel BUG at fs/buffer.c:3102! (nbd disc.)

On 3 May 2017 at 11:27, Sverd Johnsen <sverd.johnsen@...glemail.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@...il.com>
Date:   Fri Mar 24 14:08:29 2017 -0400

    nbd: replace kill_bdev() with __invalidate_device()

Vegard