[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.
[   27.073633] kauditd_printk_skb: 8 callbacks suppressed
[   27.073645] audit: type=1800 audit(1539394431.836:29): pid=5243 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0
[   27.099091] audit: type=1800 audit(1539394431.836:30): pid=5243 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.0.64' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [  578.584205] hrtimer: interrupt took 31697 ns
[  578.590182] sched: DL replenish lagged too much
[  859.959986] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 281s!
[  859.968432] Showing busy workqueues and worker pools:
[  859.973645] workqueue events: flags=0x0
[  859.977712]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256
[  859.984021]     pending: defense_work_handler, cache_reap
[  859.989581] workqueue events_power_efficient: flags=0x80
[  859.995013]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=4/256
[  860.001153]     pending: gc_worker, neigh_periodic_work, do_cache_clean, check_lifetime
[  860.009316] workqueue mm_percpu_wq: flags=0x8
[  860.013788]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  860.019939]     pending: vmstat_update