linux-ext4 - Re: Filessystem corruptions while using rsnapshot

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

Date:	Wed, 09 Sep 2009 16:35:45 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	Markus Trippelsdorf <markus@...ppelsdorf.de>
CC:	linux-ext4@...r.kernel.org
Subject: Re: Filessystem corruptions while using rsnapshot

Markus Trippelsdorf wrote:
> On Wed, Sep 09, 2009 at 12:21:21PM -0500, Eric Sandeen wrote:
>> Markus Trippelsdorf wrote:
>>> On Wed, Sep 09, 2009 at 09:40:41AM -0500, Eric Sandeen wrote:
>>>> Markus Trippelsdorf wrote:
>> ...
>>
>>>>> The bug is very simple to reproduce here. Just run rsnapshot several
>>>>> times per day and you will eventually hit the problem.
>>>> Could you provide a bzip2'd e2image -r of a corrupted filesystem for 
>>>> analysis?
>>> OK I've uploaded the file (~80 MB):
>>> http://www.2shared.com/file/7681344/d19d7154/disc_e2image.html
>>>
>>> Hope it helps.
>> Thanks, can't guarantee that the post-mortem will lead to the anwer but 
>> it's worth a look.
> 
> I also took a look myself and it turned out that my maildir, which
> contains the LKML messages of the last three months, is the root of the
> problem. I can now reproduce the bug, by simply running (e.g.):
> 
> cp -al /var/backup/hourly.3/localhost/home/markus/.maildir/lkml/. /var/tmp/debug
> 
> where /var is mounted as: "/dev/sda1 on /var type ext4 (rw,noatime,commit=60)"
> and /var/backup/hourly.3/localhost/ is a previous backup produced by rsnapshot.

 From the original post it wasn't quite clear; do you hit runtime 
corruption, indicated by the kernel logs when the fs is mounted, and a 
subsequent fsck also finds errors?

Just for completeness, if there are errors in the system logs, can you 
post them here as well?

Thanks,
-Eric
--
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