Re: [syzbot] [xfs?] INFO: task hung in xfs_buf_item_unpin (2)

[John Garry]

On 25/06/2025 22:10, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
>
> commit b1e09178b73adf10dc87fba9aee7787a7ad26874
> Author: John Garry <john.g.garry@xxxxxxxxxx>
> 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$