[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.178' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 857.979476] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 245s! [ 857.988059] Showing busy workqueues and worker pools: [ 857.993354] workqueue events: flags=0x0 [ 857.997466] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256 refcnt=3 [ 858.004677] in-flight: 3472:rtc_timer_do_work [ 858.009526] pending: cache_reap [ 858.013158] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 [ 858.020116] pending: defense_work_handler [ 858.024648] workqueue events_freezable: flags=0x4 [ 858.029572] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 [ 858.036507] pending: update_balloon_stats_func [ 858.041476] workqueue events_power_efficient: flags=0x80 [ 858.046918] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=4/256 refcnt=5 [ 858.053906] pending: fb_flashcursor, neigh_periodic_work, check_lifetime, sync_cmos_clock [ 858.062656] workqueue mm_percpu_wq: flags=0x8 [ 858.067145] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 [ 858.074116] pending: vmstat_update [ 858.078103] workqueue ipv6_addrconf: flags=0x40008 [ 858.083022] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1 refcnt=2 [ 858.089815] pending: addrconf_verify_work [ 858.094352] pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=245s workers=2 idle: 3636