linux-ext4 - Re: [4.7-rc6 ext3 BUG] kernel BUG at fs/ext4/xattr.c:1331

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Message-ID: <20160718052447.GE1922@dastard>
Date:	Mon, 18 Jul 2016 15:24:47 +1000
From:	Dave Chinner <david@...morbit.com>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [4.7-rc6 ext3 BUG] kernel BUG at fs/ext4/xattr.c:1331

On Sun, Jul 17, 2016 at 09:07:16PM -0700, Eric Sandeen wrote:
> On 7/17/16 8:02 PM, Dave Chinner wrote:
> > # rm !$
> > rm /mnt/scratch/fsr_test_file.27768.14.6
> > #
> > 
> > And, by removing an attribute, I can successfully remove the file.
> > So this definitely looks like a corner case xattr handling issue in
> > ext3/4.
> 
> I told xfs/227 that it could run on ext3 and ran it, but this
> didn't reproduce for me.
> 
> Can you provide a dumpe2fs -h for the root fs, this might depend on
> inode size etc.

# dumpe2fs -h /dev/sda1
dumpe2fs 1.43-WIP (18-May-2015)
Filesystem volume name:   <none>
Last mounted on:          /
Filesystem UUID:          b21615e5-fe8a-4ffc-ab80-c24cdc8b740a
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index filetype needs_recovery sparse_super large_file
Filesystem flags:         signed_directory_hash 
Default mount options:    (none)
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              624624
Block count:              2496091
Reserved block count:     124804
Free blocks:              567319
Free inodes:              352653
First block:              0
Block size:               4096
Fragment size:            4096
Reserved GDT blocks:      609
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         8112
Inode blocks per group:   507
Filesystem created:       Thu Mar 25 18:10:55 2010
Last mount time:          Tue Jul 19 01:21:57 2016
Last write time:          Tue Jul 19 01:21:57 2016
Mount count:              10
Maximum mount count:      27
Last checked:             Mon Jul 18 21:59:01 2016
Check interval:           15552000 (6 months)
Next check after:         Sat Jan 14 22:59:01 2017
Lifetime writes:          13 GB
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:               256
Required extra isize:     28
Desired extra isize:      28
Journal inode:            8
First orphan inode:       219355
Default directory hash:   half_md4
Directory Hash Seed:      740ffa95-af8d-4e89-b68c-5e768a27ece3
Journal backup:           inode blocks
Journal features:         journal_incompat_revoke
Journal size:             128M
Journal length:           32768
Journal sequence:         0x01c975b5
Journal start:            12

-Dave.
-- 
Dave Chinner
david@...morbit.com
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