linux-ext4 - Re: Mild filesystem corruption on ext4 (no journal)

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:	Fri, 05 Jun 2009 22:42:41 +0100
From:	Alan Jenkins <alan-jenkins@...fmail.co.uk>
To:	Kay Sievers <kay.sievers@...y.org>
CC:	Eric Sandeen <sandeen@...hat.com>,
	Aioanei Rares <krnl.list@...il.com>,
	linux-ext4@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Mild filesystem corruption on ext4 (no journal)

Kay Sievers wrote:
> On Fri, Jun 5, 2009 at 18:43, Alan Jenkins<alan-jenkins@...fmail.co.uk> wrote:
>
>   
>> If I remove the corrupted file and copy a "known good" copy into it's place,
>> then the corruption doesn't happen.  I've verified this a couple of times.
>>  The corruption only occurs if the file was created by "locale-gen".
>>     
>
> Does it use things like: fallocate()?
>
> Kay
>   

Not quite. Ted says it's already reported as

    http://bugzilla.kernel.org/show_bug.cgi?id=13292

It includes an strace log which implicates the use of both mmap() and 
write() on the same file.  Sounds scary :-).

Alan
--
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