syzbot has bisected this issue to:
commit c18e3235646a8ba74d013067a6475c8d262d3776
Author: Josef Bacik <josef@xxxxxxxxxxxxxx>
Date: Thu Dec 2 20:34:32 2021 +0000
btrfs: reserve extra space for the free space tree
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10528fb7680000
start commit: 23dfa043f6d5 Merge tag 'i2c-for-6.7-rc2' of git://git.kern..
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=12528fb7680000
console output: https://syzkaller.appspot.com/x/log.txt?x=14528fb7680000
kernel config: https://syzkaller.appspot.com/x/.config?x=d05dd66e2eb2c872
dashboard link: https://syzkaller.appspot.com/bug?extid=10e8dae9863cb83db623
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17722e24e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11201350e80000
Reported-by: syzbot+10e8dae9863cb83db623@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: c18e3235646a ("btrfs: reserve extra space for the free space tree")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
