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Date:	Fri, 1 Apr 2011 14:07:57 GMT
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 32182] EXT4-fs error: bad header/extent

https://bugzilla.kernel.org/show_bug.cgi?id=32182





--- Comment #1 from Anonymous Emailer <anonymous@...nel-bugs.osdl.org>  2011-04-01 14:07:56 ---
Reply-To: xiaoqiangnk@...il.com

Could the bug be reproduced?
If so,  how to?

On Wed, Mar 30, 2011 at 12:47 AM,  <bugzilla-daemon@...zilla.kernel.org> wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=32182
>
>           Summary: EXT4-fs error: bad header/extent
>           Product: File System
>           Version: 2.5
>    Kernel Version: 2.6.38.1
>          Platform: All
>        OS/Version: Linux
>              Tree: Mainline
>            Status: NEW
>          Severity: high
>          Priority: P1
>         Component: ext4
>        AssignedTo: fs_ext4@...nel-bugs.osdl.org
>        ReportedBy: ramses.rommel@...il.com
>        Regression: No
>
>
> I started noticing ext4-fs errors in my dmesg output, they look like this:
>
> EXT4-fs error (device sda2): ext4_ext_check_inode:428: inode #3760218: comm
> dropbox: bad header/extent: invalid magic - magic 0, entries 0, max 0(0), depth
> 0(0)
> EXT4-fs error (device sda2): ext4_ext_check_inode:428: inode #3760208: comm
> dropbox: bad header/extent: invalid magic - magic 0, entries 0, max 0(0), depth
> 0(0)
> EXT4-fs error (device sda2): ext4_ext_check_inode:428: inode #3760218: comm
> thunderbird-bin: bad header/extent: invalid magic - magic 0, entries 0, max
> 0(0), depth 0(0)
> EXT4-fs error (device sda2): ext4_ext_check_inode:428: inode #3760208: comm
> thunderbird-bin: bad header/extent: invalid magic - magic 0, entries 0, max
> 0(0), depth 0(0)
>
> I fsck'ed the partition which showed nothing but the regular output but said
> the file system was modified, after a reboot the same errors returned though.
> I'm using e2fsprogs 1.41.14 and linux 2.6.38.1 and after a downgrade to linux
> 2.6.37.5 the errors kept reappearing (I'll test 2.6.38.2 soon but I didn't find
> commit messages that seemed relevant).
>
> I ran debugfs on one of the inodes:
>
> % debugfs -R 'stat <3760208>' /dev/disk/by-label/home
> debugfs 1.41.14 (22-Dec-2010)
> Inode: 3760208   Type: regular    Mode:  0644   Flags: 0x80000
> Generation: 231468018    Version: 0x00000001
> User:  1000   Group:   100   Size: 42
> File ACL: 0    Directory ACL: 0
> Links: 1   Blockcount: 0
> Fragment:  Address: 0    Number: 0    Size: 0
> ctime: 0x4b2a09ff -- Thu Dec 17 11:37:51 2009
> atime: 0x4d909367 -- Mon Mar 28 15:55:51 2011
> mtime: 0x490976f8 -- Thu Oct 30 09:57:28 2008
> EXTENTS:
>
> I'm not sure what extra info to give you, but I'd be glad to provide stuff you
> need to reproduce/fix this.
>
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