BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 227s! Kernel panic - not syncing: hung_task: blocked tasks CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.90+ #29 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x11b lib/dump_stack.c:53 panic+0x1bf/0x3a4 kernel/panic.c:181 check_hung_uninterruptible_tasks kernel/hung_task.c:197 [inline] watchdog+0x585/0xa70 kernel/hung_task.c:252 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 Kernel Offset: 0x8e00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) Rebooting in 86400 seconds..