From: bugme-daemon@bugzilla.kernel.org
Subject: [Bug 12433] Oops while resizing an ext4 LVM2 volume
Date: Fri, 23 Jan 2009 14:00:37 -0800 (PST)
Message-ID: <20090123220037.8E36B10800C@picon.linux-foundation.org>
References: <bug-12433-13602@http.bugzilla.kernel.org/>
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http://bugzilla.kernel.org/show_bug.cgi?id=12433





------- Comment #2 from peter@kerwien.homeip.net  2009-01-23 14:00 -------
flex_bg is default on when creating ext4 on my Gentoo system.

Yeap, I found this in my log:
...
Jan 11 20:54:58 kerwien kernel: EXT4-fs: mounted filesystem dm-0 with ordered
data mode
Jan 11 20:56:41 kerwien kernel: EXT4-fs error (device dm-0):
ext4_get_group_desc: block_group >= groups_count -
 block_group = 401, groups_count = 401
Jan 11 20:56:41 kerwien kernel: BUG: unable to handle kernel NULL pointer
dereference at (null)
Jan 11 20:56:41 kerwien kernel: IP: [<ffffffffa01c6b59>]
ext4_block_bitmap+0x9/0x30 [ext4]
Jan 11 20:56:41 kerwien kernel: PGD 1a873067 PUD 3eded067 PMD 0 
...

I can try the patch and see if I can reproduce the problem again or not.


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