linux-kernel - Re: [BUG] raid1 behind writes alter bio structure illegally

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]

Message-ID: <4A70AEA6.9030209@steeleye.com>
Date:	Wed, 29 Jul 2009 16:18:46 -0400
From:	Paul Clements <paul.clements@...eleye.com>
To:	Milan Broz <mbroz@...hat.com>
CC:	linux-raid@...r.kernel.org, Neil Brown <neilb@...e.de>,
	kernel list <linux-kernel@...r.kernel.org>,
	ian.campbell@...rix.com
Subject: Re: [BUG] raid1 behind writes alter bio structure illegally

Milan Broz wrote:
> Hi Paul,
> 
> Paul Clements wrote:
>> I've run into this bug on a 2.6.18 kernel, but I think the fix is still 
>> applicable to the latest kernels (even though the symptoms would be 
>> slightly different).
>>
>> Perhaps someone who knows the block and/or SCSI layers well can comment 
>> on the legality of attaching new pages to a bio without fixing up the 
>> internal bio counters (details below)?
> 
>> LVM over raid1 over SCSI/nbd
> 
> Please can you try that backporting of this patch helps?
> 
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=5d84070ee0a433620c57e85dac7f82faaec5fbb3
> 
> (If so, see https://bugzilla.redhat.com/show_bug.cgi?id=512387)

Thanks Milan. I tested the patch and it does fix the issue. I replied to 
the bugzilla report with this information.

--
Paul
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/