linux-ext4 - Re: fiemap is broken for sparse file in ext4?

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: <4C125A6C.2090805@redhat.com>
Date:	Fri, 11 Jun 2010 10:46:52 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	Tao Ma <tao.ma@...cle.com>
CC:	linux-ext4@...r.kernel.org, Theodore Tso <tytso@....edu>,
	linux-kernel@...r.kernel.org
Subject: Re: fiemap is broken for sparse file in ext4?

Tao Ma wrote:

>> What are you using to call fiemap?  Here it seems to be working:
> I just wrote a simple test program by calling ioctl. It is attached.
> btw, you need to call it immediately after dd so that we have a chance
> that ext4 don't have time to allocate extents. ;)

OK I take it back, I do see it.  *cough* too many different filesystems
on this box ... ;)

Yes, it does look like a bug.

-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