Re: [syzbot] [bcachefs?] UBSAN: shift-out-of-bounds in __btree_node_pinned

[syzbot]

syzbot has bisected this issue to:

commit 7a51608d0125469664e2daf8e060d6d783924c98
Author: Kent Overstreet <kent.overstreet@xxxxxxxxx>
Date:   Thu Sep 5 00:49:37 2024 +0000

    bcachefs: Rework btree node pinning

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=115c06c4580000
start commit:   ccb98ccef0e5 Merge tag 'platform-drivers-x86-v6.13-4' of g..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=135c06c4580000
console output: https://syzkaller.appspot.com/x/log.txt?x=155c06c4580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ba7cde9482d6bb6
dashboard link: https://syzkaller.appspot.com/bug?extid=9f41e4b255897d99d4e9
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=118c28b0580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11d45af8580000

Reported-by: syzbot+9f41e4b255897d99d4e9@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 7a51608d0125 ("bcachefs: Rework btree node pinning")

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