Message-ID: <3757403E-4B21-4140-BC86-7E2265FAE074@internode.on.net>
Date:   Mon, 13 May 2019 17:15:35 +0930
From:   Arthur Marsh <arthur.marsh@...ernode.on.net>
To:     Theodore Ts'o <tytso@....edu>,
        Richard Weinberger <richard.weinberger@...il.com>
CC:     LKML <linux-kernel@...r.kernel.org>, linux-ext4@...r.kernel.org
Subject: Re: ext3/ext4 filesystem corruption under post 5.1.0 kernels



On 12 May 2019 7:36:59 am ACST, Theodore Ts'o <tytso@....edu> wrote:
>On Sat, May 11, 2019 at 02:43:16PM +0200, Richard Weinberger wrote:
>> [CC'in linux-ext4]
>> 
>> On Sat, May 11, 2019 at 1:47 PM Arthur Marsh
>> <arthur.marsh@...ernode.on.net> wrote:
>> >
>> >
>> > The filesystem with the kernel source tree is the root file system,
>ext3, mounted as:
>> >
>> > /dev/sdb7 on / type ext3 (rw,relatime,errors=remount-ro)
>> >
>> > After the "Compressing objects" stage, the following appears in
>dmesg:
>> >
>> > [  848.968550] EXT4-fs error (device sdb7): ext4_get_branch:171:
>inode #8: block 30343695: comm jbd2/sdb7-8: invalid block
>> > [  849.077426] Aborting journal on device sdb7-8.
>> > [  849.100963] EXT4-fs (sdb7): Remounting filesystem read-only
>> > [  849.100976] jbd2_journal_bmap: journal block not found at offset
>989 on sdb7-8
>
>This indicates that the extent tree blocks for the journal was found
>to be corrupt; so the journal couldn't be found.
>
>> > # fsck -yv
>> > fsck from util-linux 2.33.1
>> > e2fsck 1.45.0 (6-Mar-2019)
>> > /dev/sdb7: recovering journal
>> > /dev/sdb7 contains a file system with errors, check forced.
>
>But e2fsck had no problem finding the journal.
>
>> > Pass 1: Checking inodes, blocks, and sizes
>> > Pass 2: Checking directory structure
>> > Pass 3: Checking directory connectivity
>> > Pass 4: Checking reference counts
>> > Pass 5: Checking group summary information
>> > Free blocks count wrong (4619656, counted=4619444).
>> > Fix? yes
>> >
>> > Free inodes count wrong (15884075, counted=15884058).
>> > Fix? yes
>
>And no other significant problems were found.  (Ext4 never updates or
>relies on the summary number of free blocks and free inodes, since
>updating it is a scalability bottleneck and these values can be
>calculated from the per block group free block/inodes count.  So the
>fact that e2fsck needed to update them is not an issue.)
>
>So that implies that we got one set of values when we read the journal
>inode when attempting to mount the file system, and a *different* set
>of values when e2fsck was run.  Which makes means that we need
>consider the possibility that the problem is below the file system
>layer (e.g., the block layer, device drivers, etc.).
>
>
>> > /dev/sdb7: ***** FILE SYSTEM WAS MODIFIED *****
>> >
>> > Other times, I have gotten:
>> >
>> > "Inodes that were part of a corrupted orphan linked list found."
>> > "Block bitmap differences:"
>> > "Free blocks sound wrong for group"
>> >
>
>This variety of issues also implies that the issue may be in the data
>read by the file system, as opposed to an issue in the file system.
>
>Arthur, can you give us the full details of your hardware
>configuration and your kernel config file?  Also, what kernel git
>commit ID were you testing?
>
>					- Ted

Please see the attachments, this machine has a Pentium-D and PATA drive for the root filesystem and 32 bit kernel but I also experienced the same problem on an Athlon II X4 640 machine with SATA drive for the root filesystem and 64 bit kernel. 

Arthur. 

-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.
Download attachment "20190513gitbisect.log" of type "application/octet-stream" (2855 bytes)

Download attachment "20190513.config" of type "application/octet-stream" (127698 bytes)

Download attachment "20190513dmesg.log" of type "application/octet-stream" (57213 bytes)

View attachment "20190513cpuinfo.txt" of type "text/plain" (1540 bytes)

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