linux-kernel - Re: [PATCH 1/1] udf: Fix incorrect final NOT

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]

Message-ID: <20190619064711.GA27954@quack2.suse.cz>
Date:   Wed, 19 Jun 2019 08:47:11 +0200
From:   Jan Kara <jack@...e.cz>
To:     Steve Magnani <steve.magnani@...idescorp.com>
Cc:     Jan Kara <jack@...e.com>, linux-kernel@...r.kernel.org,
        "Steven J . Magnani" <steve@...idescorp.com>
Subject: Re: [PATCH 1/1] udf: Fix incorrect final NOT_ALLOCATED (hole) extent
 length

Hi Steve!

On Sun 16-06-19 11:28:46, Steve Magnani wrote:
> On 6/4/19 7:31 AM, Steve Magnani wrote:
> 
> > In some cases, using the 'truncate' command to extend a UDF file results
> > in a mismatch between the length of the file's extents (specifically, due
> > to incorrect length of the final NOT_ALLOCATED extent) and the information
> > (file) length. The discrepancy can prevent other operating systems
> > (i.e., Windows 10) from opening the file.
> > 
> > Two particular errors have been observed when extending a file:
> > 
> > 1. The final extent is larger than it should be, having been rounded up
> >     to a multiple of the block size.
> > 
> > B. The final extent is shorter than it should be, due to not having
> >     been updated when the file's information length was increased.
> 
> Wondering if you've seen this, or if something got lost in a spam folder.

Sorry for not getting to you earlier. I've seen the patches and they look
reasonable to me. I just wanted to have a one more closer look but last
weeks were rather busy so I didn't get to it. I'll look into it this week.
Thanks a lot for debugging the problem and sending the fixes!

								Honza
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR