linux-ext4 - Re: kernel panic using external journal and snapshots

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Mon, 25 Nov 2013 11:32:16 +0800
From:	Zheng Liu <gnehzuil.liu@...il.com>
To:	Gordon Messmer <gordon.messmer@...il.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: kernel panic using external journal and snapshots

On Sat, Nov 23, 2013 at 12:30:48PM -0800, Gordon Messmer wrote:
> On 11/21/2013 11:11 PM, Zheng Liu wrote:
> >For the first question, I haven't a LVM device on my hand.  Hence I am
> >not sure whether there is a bug or not.
> >
> >For the second one, I do a test on my sand box against Linux-3.12-rc5,
> >and it works well.  So I think maybe you can try it again on a newer
> >kernel.
> 
> The problem manifests when a filesystem which uses external journal
> and its snapshot are simultaneously mounted.  If you don't have an
> LVM device with which to create a snapshot, I'm not sure what you're
> testing.  Could you clarify?

Ah, sorry, I don't clarify my test.  I just split two partitions on a
hard disk and create a ext4 file system with external journal.  Then I
use tune2fs with '-O ^has_journal' to remove external journal.  After
that I try to mount this file system on 3.12-rc5, and it work well.
That's all I have done.

Thanks,
                                                - Zheng
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html