BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 168s!
INFO: task kworker/u4:2:34 blocked for more than 140 seconds.
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=12/256 refcnt=13
      Not tainted 4.14.275-syzkaller #0
    in-flight: 28429:rtc_timer_do_work
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.