[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.221' (ECDSA) to the list of known hosts. 2021/10/13 16:42:14 fuzzer started 2021/10/13 16:42:14 connecting to host at 10.128.0.169:37133 2021/10/13 16:42:14 checking machine... 2021/10/13 16:42:14 checking revisions... 2021/10/13 16:42:14 testing simple program... 2021/10/13 16:42:14 BUG: host setup failed: failed to run ["./syz-executor" "setup" "fault" "usb"]: 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: [ 69.727155][ T6536] cgroup: Unknown subsys name 'net'