linux-kernel - Re: Fwd: ext4 extents.c bug

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: <20120313195750.GB24124@thunk.org>
Date:	Tue, 13 Mar 2012 15:57:50 -0400
From:	Ted Ts'o <tytso@....edu>
To:	Frej Eriksson <frej.eriksson@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Fwd: ext4 extents.c bug

On Tue, Mar 13, 2012 at 08:39:56PM +0100, Frej Eriksson wrote:
> [  950.128885] ------------[ cut here ]------------
> [  950.128893] kernel BUG at /build/buildd/linux-2.6.35/fs/ext4/extents.c:1971!

Your file system is corrupted, and there are two bugs.  (1) e2fsck
wasn't detecting this form of file system corruption (a zero-length
extent entry), and (2) the kernel was not noticing until an assertion
check using BUG_ON, instead of flagging this as a file systme error.

The fixes for both of these problems, in the kernel and in e2fsprogs,
are here:

    http://article.gmane.org/gmane.comp.file-systems.ext4/31359
    http://article.gmane.org/gmane.comp.file-systems.ext4/31360

Best regards,

						- Ted
--
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/