linux-kernel - Re: [syzbot] [xfs?] INFO: task hung in xfs_buf_item

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Message-ID: <f9c44529-78cb-4db6-a83c-b5f3bb13ee6d@oracle.com>
Date: Thu, 26 Jun 2025 08:33:34 +0100
From: John Garry <john.g.garry@...cle.com>
To: syzbot <syzbot+837bcd54843dd6262f2f@...kaller.appspotmail.com>,
        axboe@...nel.dk, cem@...nel.org, chandan.babu@...cle.com,
        david@...morbit.com, djwong@...nel.org, hch@....de,
        linux-kernel@...r.kernel.org, linux-xfs@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [xfs?] INFO: task hung in xfs_buf_item_unpin (2)

On 25/06/2025 22:10, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
> 
> commit b1e09178b73adf10dc87fba9aee7787a7ad26874
> Author: John Garry <john.g.garry@...cle.com>
> Date:   Wed May 7 21:18:31 2025 +0000
> 
>      xfs: commit CoW-based atomic writes atomically
> 

I doubt that.

> bisection log:  https://urldefense.com/v3/__https://syzkaller.appspot.com/x/bisect.txt?x=1078f70c580000__;!!ACWV5N9M2RV99hQ!IO9HLnkduh21RXrysCkGd5EwKULWXBKlb3ev5ZMgQeelky5q1WN8EEbZRFGFt6mQ3V-5nQ0Hy7Pdg7_O1wnAnQsnkiZHt6E2Mjghf5yjgkc$
> start commit:   85652baa895b Merge tag 'block-6.11-20240824' of git://git...
> git tree:       upstream
> kernel config:  https://urldefense.com/v3/__https://syzkaller.appspot.com/x/.config?x=92c0312151c4e32e__;!!ACWV5N9M2RV99hQ!IO9HLnkduh21RXrysCkGd5EwKULWXBKlb3ev5ZMgQeelky5q1WN8EEbZRFGFt6mQ3V-5nQ0Hy7Pdg7_O1wnAnQsnkiZHt6E2Mjgh1hPp424$
> dashboard link: https://urldefense.com/v3/__https://syzkaller.appspot.com/bug?extid=837bcd54843dd6262f2f__;!!ACWV5N9M2RV99hQ!IO9HLnkduh21RXrysCkGd5EwKULWXBKlb3ev5ZMgQeelky5q1WN8EEbZRFGFt6mQ3V-5nQ0Hy7Pdg7_O1wnAnQsnkiZHt6E2MjghsY_KRNw$
> syz repro:      https://urldefense.com/v3/__https://syzkaller.appspot.com/x/repro.syz?x=12350ad5980000__;!!ACWV5N9M2RV99hQ!IO9HLnkduh21RXrysCkGd5EwKULWXBKlb3ev5ZMgQeelky5q1WN8EEbZRFGFt6mQ3V-5nQ0Hy7Pdg7_O1wnAnQsnkiZHt6E2Mjgh1b3S_m0$
> C reproducer:   https://urldefense.com/v3/__https://syzkaller.appspot.com/x/repro.c?x=147927c5980000__;!!ACWV5N9M2RV99hQ!IO9HLnkduh21RXrysCkGd5EwKULWXBKlb3ev5ZMgQeelky5q1WN8EEbZRFGFt6mQ3V-5nQ0Hy7Pdg7_O1wnAnQsnkiZHt6E2MjghsawMc2o$
> 
> If the result looks correct, please mark the issue as fixed by replying with:
> 
> #syz fix: xfs: commit CoW-based atomic writes atomically
> 
> For information about bisection process see: https://urldefense.com/v3/__https://goo.gl/tpsmEJ*bisection__;Iw!!ACWV5N9M2RV99hQ!IO9HLnkduh21RXrysCkGd5EwKULWXBKlb3ev5ZMgQeelky5q1WN8EEbZRFGFt6mQ3V-5nQ0Hy7Pdg7_O1wnAnQsnkiZHt6E2MjghUHDt4Ao$