linux-ext4 - [Bug 25352] resizing ext4 will corrupt filesystem

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:	Tue, 21 Dec 2010 13:10:29 GMT
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 25352] resizing ext4 will corrupt filesystem

https://bugzilla.kernel.org/show_bug.cgi?id=25352





--- Comment #6 from Lukas Czerner <lczerner@...hat.com>  2010-12-21 13:10:28 ---
On Mon, 20 Dec 2010, Ted Ts'o wrote:

> On Mon, Dec 20, 2010 at 08:56:46PM +0000, bugzilla-daemon@...zilla.kernel.org wrote:
> > 
> > Using resize2fs on an ext4 will result in a corrupted filesystem. This is a
> > regression (obviously).
> 
> Yes, this is a regression new to 2.6.37-rc1, which was introduced by
> commit a31437b85: ext4: use sb_issue_zeroout in setup_new_group_blocks.
> 
> When we replaced the loop zero'ing the inode table blocks with
> sb_issue_zeroout, we accidentally also removed this little tidbit:
> 
> -               ext4_set_bit(bit, bh->b_data);
> 
> ... which was responsible for setting the block allocation bitmap to
> reserve the block descriptor blocks and inode table blocks.  Oops...
> 
> I believe this patch should fix things.
> 
> 						- Ted
> 
> 
> 

Oops indeed. Ted, thanks for the patch, it seems to fix the problem
completely.

-Lukas

-- 
Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.--
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