linux-kernel - Re: bug in fsck or ext2/ext3?

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Message-ID: <46F7FEF9.2070702@davidnewall.com>
Date:	Tue, 25 Sep 2007 03:46:25 +0930
From:	David Newall <david@...idnewall.com>
To:	Dave Jones <davej@...hat.com>,
	Antoine Martin <antoine@...afix.co.uk>, tytso@...nk.org,
	Linux Kernel Development <linux-kernel@...r.kernel.org>
Subject: Re: bug in fsck or ext2/ext3?

Dave Jones wrote:
> On Mon, Sep 24, 2007 at 05:56:39PM +0100, Antoine Martin wrote:
>
>  > # rm -fr tmp/chroot.broken
>  > rm: cannot remove directory (...)
>  > Same result when trying to do anything to those files chown/chmod/touch:
>  > "Operation not permitted"
>
> Various files in the directories it complains about have their 'i'
> bit set.  lsattr will show you.   chattr -i those files, and the
> directory is removable again.

Additionally, this is a classic symptom of malware.  A directory  named 
"..." is a big hint.
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