syzbot suspects this issue was fixed by commit: commit 7ee285395b211cad474b2b989db52666e0430daf Author: Waiman Long <longman@xxxxxxxxxx> Date: Sat Sep 18 22:53:08 2021 +0000 cgroup: Make rebind_subsystems() disable v2 controllers all at once bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12232c06b00000 start commit: 442489c21923 Merge tag 'timers-core-2020-08-04' of git://g.. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=b3f0df8558780a7d dashboard link: https://syzkaller.appspot.com/bug?extid=9c08aaa363ca5784c9e9 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14148c62900000 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: cgroup: Make rebind_subsystems() disable v2 controllers all at once For information about bisection process see: https://goo.gl/tpsmEJ#bisection