[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[   33.257507] audit: type=1800 audit(1538911812.191:25): pid=5885 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0
[   33.295825] audit: type=1800 audit(1538911812.191:26): pid=5885 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0
[   33.320586] audit: type=1800 audit(1538911812.191:27): pid=5885 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.10.36' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [  572.820132] BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 161s!
[  572.828482] Showing busy workqueues and worker pools:
[  572.833710] workqueue events: flags=0x0
[  572.837665]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=4/256
[  572.843801]     in-flight: 12:rtc_timer_do_work
[  572.848547]     pending: vmstat_shepherd, cache_reap, check_corruption
[  572.855324] workqueue events_power_efficient: flags=0x80
[  572.860769]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
[  572.866904]     pending: do_cache_clean
[  572.870921] workqueue mm_percpu_wq: flags=0x8
[  572.875398]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
[  572.881531]     pending: vmstat_update
[  572.885463] workqueue dm_bufio_cache: flags=0x8
[  572.890145]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
[  572.896280]     pending: work_fn
[  572.899650] workqueue ipv6_addrconf: flags=0x40008
[  572.904582]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/1
[  572.910589]     pending: addrconf_verify_work
[  572.915174] pool 0: cpus=0 node=0 flags=0x0 nice=0 hung=161s workers=2 idle: 5