[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 35.595659] audit: type=1800 audit(1538907892.739:25): pid=5614 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 35.613878] audit: type=1800 audit(1538907892.739:26): pid=5614 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 35.640651] audit: type=1800 audit(1538907892.749:27): pid=5614 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.10.13' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 716.108234] BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 204s! [ 716.116531] Showing busy workqueues and worker pools: [ 716.121925] workqueue events: flags=0x0 [ 716.125877] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=4/256 [ 716.132167] in-flight: 14:rtc_timer_do_work [ 716.136831] pending: vmstat_shepherd, cache_reap, check_corruption [ 716.143535] workqueue events_power_efficient: flags=0x80 [ 716.149131] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 [ 716.155263] pending: do_cache_clean [ 716.159262] workqueue mm_percpu_wq: flags=0x8 [ 716.163729] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 [ 716.169856] pending: vmstat_update [ 716.173775] workqueue kacpi_notify: flags=0x0 [ 716.178264] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/1 [ 716.184231] pending: acpi_os_execute_deferred [ 716.189162] pool 0: cpus=0 node=0 flags=0x0 nice=0 hung=204s workers=2 idle: 2683