[ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.46' (ECDSA) to the list of known hosts. 2021/10/13 11:54:48 fuzzer started 2021/10/13 11:54:48 dialing manager at 10.128.0.169:40909 2021/10/13 11:54:48 checking machine... 2021/10/13 11:54:48 checking revisions... 2021/10/13 11:54:48 testing simple program... 2021/10/13 11:54:48 Manager.Check call failed: machine check failed: host setup failed: failed to run ["./syz-executor" "setup" "fault" "binfmt_misc" "usb" "802154"]: exit status 67 write(cgroup.subtree_control, +cpu) failed: 2 write(cgroup.subtree_control, +memory) failed: 2 write(cgroup.subtree_control, +io) failed: 2 write(cgroup.subtree_control, +pids) failed: 2 write(cgroup.subtree_control, +rdma) failed: 2 mount(/syzcgroup/net, net) failed: 22 mount(/syzcgroup/net, net_cls) failed: 16 mount(/syzcgroup/net, net_prio) failed: 16 SYZFAIL: mount cgroup failed (/syzcgroup/net, devices,blkio,freezer): 16 (errno 16: Device or resource busy) syzkaller login: [ 50.207507][ T6513] cgroup: Unknown subsys name 'net'