syzbot suspects this issue was fixed by commit:

commit 3a04334d6282d08fbdd6201e374db17d31927ba3
Author: Alan Huang [off-list ref]
Date:   Fri Mar 7 16:58:27 2025 +0000

    bcachefs: Fix b->written overflow

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=176e8e98580000
start commit:   09fbf3d50205 Merge tag 'tomoyo-pr-20250211' of git://git.c..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=c516b1c112a81e77
dashboard link: https://syzkaller.appspot.com/bug?extid=b581c7106aa616bb522c
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11e449b0580000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: bcachefs: Fix b->written overflow

For information about bisection process see: https://goo.gl/tpsmEJ#bisection