[  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 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...
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Update UTMP about System Runlevel Changes.
[  OK  ] Started Load/Save RF Kill Switch Status.
Warning: Permanently added '10.128.10.32' (ECDSA) to the list of known hosts.

Debian GNU/Linux 9 syzkaller ttyS0

2021/10/13 15:47:13 fuzzer started
2021/10/13 15:47:13 connecting to host at 10.128.0.169:42969
2021/10/13 15:47:13 checking machine...
2021/10/13 15:47:13 checking revisions...
2021/10/13 15:47:13 testing simple program...
2021/10/13 15:47:13 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: [   78.175963][ T6547] cgroup: Unknown subsys name 'net'