syzbot has bisected this issue to:
commit 103406b38c600fec1fe375a77b27d87e314aea09
Author: Lion Ackermann <nnamrec@xxxxxxxxx>
Date: Mon Jun 30 13:27:30 2025 +0000
net/sched: Always pass notifications when child class becomes empty
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10d66c8c580000
start commit: 17bbde2e1716 Merge tag 'net-6.16-rc5' of git://git.kernel...
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=12d66c8c580000
console output: https://syzkaller.appspot.com/x/log.txt?x=14d66c8c580000
kernel config: https://syzkaller.appspot.com/x/.config?x=8b0724e6945b4773
dashboard link: https://syzkaller.appspot.com/bug?extid=15b96fc3aac35468fe77
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14044c8c580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14840c8c580000
Reported-by: syzbot+15b96fc3aac35468fe77@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 103406b38c60 ("net/sched: Always pass notifications when child class becomes empty")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection