linux-kernel - Re: [syzbot] Monthly btrfs report (Feb 2024)

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Date: Sat, 10 Feb 2024 19:18:29 +1030
From: Qu Wenruo <quwenruo.btrfs@....com>
To: syzbot <syzbot+listad2f01a497df9ab5d719@...kaller.appspotmail.com>,
 clm@...com, dsterba@...e.com, josef@...icpanda.com,
 linux-btrfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
 linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] Monthly btrfs report (Feb 2024)



On 2024/2/10 07:27, syzbot wrote:
> Hello btrfs maintainers/developers,
>
> This is a 31-day syzbot report for the btrfs subsystem.
> All related reports/information can be found at:
> https://syzkaller.appspot.com/upstream/s/btrfs
>
> During the period, 1 new issues were detected and 1 were fixed.
> In total, 43 issues are still open and 51 have been fixed so far.
>
> Some of the still happening issues:
>
> Ref  Crashes Repro Title
> <1>  5804    Yes   kernel BUG in close_ctree
>                     https://syzkaller.appspot.com/bug?extid=2665d678fffcc4608e18

I'm not sure why, but I never had a good experience reproducing the bug
using the C reproduer.

Furthermore, for this particular case, using that C reproducer only
reduced tons of duplicated dmesg of:

[  162.264838] btrfs: Unknown parameter 'noinode_cache'
[  162.308573] loop0: detected capacity change from 0 to 32768
[  162.308964] btrfs: Unknown parameter 'noinode_cache'
[  162.313582] loop1: detected capacity change from 0 to 32768
[  162.314070] btrfs: Unknown parameter 'noinode_cache'
[  162.323629] loop3: detected capacity change from 0 to 32768
[  162.324000] btrfs: Unknown parameter 'noinode_cache'
[  162.328046] loop2: detected capacity change from 0 to 32768
[  162.328417] btrfs: Unknown parameter 'noinode_cache'

Unlike the latest report which shows a lot of other things.

Anyone can help verifying the C reproducer?
Or I'm doing something wrong withe the reproducer?

Thanks,
Qu
> <2>  2636    Yes   WARNING in btrfs_space_info_update_bytes_may_use
>                     https://syzkaller.appspot.com/bug?extid=8edfa01e46fd9fe3fbfb
> <3>  251     Yes   INFO: task hung in lock_extent
>                     https://syzkaller.appspot.com/bug?extid=eaa05fbc7563874b7ad2
> <4>  245     Yes   WARNING in btrfs_chunk_alloc
>                     https://syzkaller.appspot.com/bug?extid=e8e56d5d31d38b5b47e7
> <5>  224     Yes   WARNING in btrfs_remove_chunk
>                     https://syzkaller.appspot.com/bug?extid=e8582cc16881ec70a430
> <6>  125     Yes   kernel BUG in insert_state_fast
>                     https://syzkaller.appspot.com/bug?extid=9ce4a36127ca92b59677
> <7>  99      Yes   kernel BUG in btrfs_free_tree_block
>                     https://syzkaller.appspot.com/bug?extid=a306f914b4d01b3958fe
> <8>  88      Yes   kernel BUG in set_state_bits
>                     https://syzkaller.appspot.com/bug?extid=b9d2e54d2301324657ed
> <9>  79      Yes   WARNING in btrfs_commit_transaction (2)
>                     https://syzkaller.appspot.com/bug?extid=dafbca0e20fbc5946925
> <10> 74      Yes   WARNING in btrfs_put_transaction
>                     https://syzkaller.appspot.com/bug?extid=3706b1df47f2464f0c1e
>
> ---
> This report is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at syzkaller@...glegroups.com.
>
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>
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