[ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.20' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 857.970689] BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 247s! [ 857.979086] Showing busy workqueues and worker pools: [ 857.984540] workqueue events: flags=0x0 [ 857.988599] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=4/256 refcnt=5 [ 857.995643] in-flight: 3:rtc_timer_do_work [ 858.000211] pending: defense_work_handler, vmstat_shepherd, cache_reap [ 858.007299] workqueue events_long: flags=0x0 [ 858.011718] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 [ 858.018627] pending: gc_worker [ 858.022194] workqueue events_freezable: flags=0x4 [ 858.027020] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 [ 858.033947] pending: update_balloon_stats_func [ 858.038926] workqueue events_power_efficient: flags=0x80 [ 858.044381] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 [ 858.051294] in-flight: 7981:sync_cmos_clock [ 858.055996] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256 refcnt=4 [ 858.062937] pending: neigh_periodic_work, neigh_periodic_work, do_cache_clean [ 858.070646] workqueue mm_percpu_wq: flags=0x8 [ 858.075128] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 [ 858.082040] pending: vmstat_update [ 858.086010] workqueue dm_bufio_cache: flags=0x8 [ 858.090686] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 [ 858.097597] pending: work_fn [ 858.100993] workqueue ipv6_addrconf: flags=0x40008 [ 858.105909] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/1 refcnt=2 [ 858.112646] pending: addrconf_verify_work [ 858.117179] pool 0: cpus=0 node=0 flags=0x0 nice=0 hung=248s workers=2 idle: 3624 [ 858.125304] pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=0s workers=3 idle: 18 3573 executing program