Re: kernel BUG at fs/btrfs/extent-tree.c:8113! (4.1.3 kernel)

[Qu Wenruo <quwenruo@cn.fujitsu.com>]

Marc MERLIN wrote on 2015/08/22 07:37 -0700:
> On Mon, Aug 17, 2015 at 07:49:04AM -0700, Marc MERLIN wrote:
>> On Mon, Aug 17, 2015 at 10:01:16AM +0800, Qu Wenruo wrote:
>>> Hi Marc,
>>
>> Hi Qu, thanks for your answer and looking at this.
>>
>>> Did btrfs-debug-tree also has the crash?
>>>
>>> If not, would you please attach the output if it doesn't contain
>>> classified data.
>
> Do you need anything else before I wipe the filesystem and start over?
>
> 1) kernel is fixed not to crash
> 2) btrfs check --repair segfaults
> 3) btrfs-debug-tree ends with assert
>
> Thanks,
> Marc

Would you please take the following output?

1) btrfs check output
With error message if it happens.

2) btrfs check --repair output
Full output until segfault.

3) btrfs-debug-tree output
With assert output.

At least this should help us to figure out what's wrong with on-disk data.

Thanks,
Qu

>
>> Sure thing:
>> btrfs-debug-tree /dev/mapper/crypt_sdd1 > /tmp/tree.out
>> parent transid verify failed on 2968115101696 wanted 34855 found 39533
>> parent transid verify failed on 2968115101696 wanted 34855 found 39533
>> parent transid verify failed on 2968115101696 wanted 34855 found 39533
>> parent transid verify failed on 2968115101696 wanted 34855 found 39533
>> Ignoring transid failure
>> parent transid verify failed on 2968115134464 wanted 34855 found 39533
>> parent transid verify failed on 2968115134464 wanted 34855 found 39533
>> parent transid verify failed on 2968115134464 wanted 34855 found 39533
>> parent transid verify failed on 2968115134464 wanted 34855 found 39533
>> Ignoring transid failure
>> parent transid verify failed on 2968115150848 wanted 34855 found 39533
>> parent transid verify failed on 2968115150848 wanted 34855 found 39533
>> parent transid verify failed on 2968115150848 wanted 34855 found 39533
>> parent transid verify failed on 2968115150848 wanted 34855 found 39533
>> Ignoring transid failure
>> parent transid verify failed on 2968115691520 wanted 34855 found 39533
>> parent transid verify failed on 2968115691520 wanted 34855 found 39533
>> parent transid verify failed on 2968115691520 wanted 34855 found 39533
>> parent transid verify failed on 2968115691520 wanted 34855 found 39533
>> Ignoring transid failure
>> parent transid verify failed on 1291597152256 wanted 35830 found 39530
>> parent transid verify failed on 1291597152256 wanted 35830 found 39530
>> parent transid verify failed on 1291597152256 wanted 35830 found 39530
>> parent transid verify failed on 1291597152256 wanted 35830 found 39530
>> Ignoring transid failure
>> parent transid verify failed on 2968116592640 wanted 34855 found 39533
>> parent transid verify failed on 2968116592640 wanted 34855 found 39533
>> parent transid verify failed on 2968116592640 wanted 34855 found 39533
>> parent transid verify failed on 2968116592640 wanted 34855 found 39533
>> Ignoring transid failure
>> parent transid verify failed on 2968116609024 wanted 34855 found 39533
>> parent transid verify failed on 2968116609024 wanted 34855 found 39533
>> parent transid verify failed on 2968116609024 wanted 34855 found 39533
>> parent transid verify failed on 2968116609024 wanted 34855 found 39533
>> Ignoring transid failure
>> print-tree.c:1094: btrfs_print_tree: Assertion failed.
>> btrfs-debug-tree[0x805ce93]
>> btrfs-debug-tree(btrfs_print_tree+0x26d)[0x805eb51]
>> btrfs-debug-tree(btrfs_print_tree+0x279)[0x805eb5d]
>> btrfs-debug-tree(main+0x8b5)[0x804dfb7]
>> /lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0xb757c4d3]
>> btrfs-debug-tree[0x804e221]
>>
>> Do you want the actual output?
>> (it's 1.1GB uncompressed)
>>
>> Marc
>>
>>
>>> Thanks,
>>> Qu
>>>
>>> Marc MERLIN wrote on 2015/08/12 10:19 -0700:
>>>> On Wed, Aug 12, 2015 at 12:18:45PM -0400, Josef Bacik wrote:
>>>>> Going to need more info to figure this one out
>>>>
>>>> Thanks for the patch, here's the output:
>>>> enabling repair mode
>>>> Checking filesystem on /dev/mapper/crypt_sdd1
>>>> UUID: 024ba4d0-dacb-438d-9f1b-eeb34083fe49
>>>> checking extents
>>>> wtf, parent 575708413952 <<<<<<
>>>> cmds-check.c:4488: add_data_backref: Assertion `back->bytes != max_size` failed.
>>>> /tmp/btrfs[0x8066a83]
>>>> /tmp/btrfs[0x8066ab4]
>>>> /tmp/btrfs[0x80679d8]
>>>> /tmp/btrfs[0x806b4f2]
>>>> /tmp/btrfs[0x806b9ea]
>>>> /tmp/btrfs[0x806c5f9]
>>>> /tmp/btrfs(cmd_check+0x1088)[0x806ee26]
>>>> /tmp/btrfs(main+0x153)[0x80557d6]
>>>> /lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0xb75a54d3]
>>>> /tmp/btrfs[0x80557fc]
>>>>
>>>> Marc
>>>>
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>>
>> --
>> "A mouse is a device used to point at the xterm you want to type in" - A.S.R.
>> Microsoft is to operating systems ....
>>                                        .... what McDonalds is to gourmet cooking
>> Home page: http://marc.merlins.org/                         | PGP 1024R/763BE901
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>