BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 252s!
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=-20 stuck for 252s!
Kernel panic - not syncing: hung_task: blocked tasks
CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.148+ #3
 ffff8801d9907c68 ffffffff81b456e1 ffff8801d7f04700 ffffffff82a79d20
 00000000ffffffff 0000000000000000 00000000003fff65 ffff8801d9907d48
 ffffffff813f727a 0000000041b58ab3 ffffffff82e356f2 ffffffff813f70a1
Call Trace:
 [<ffffffff81b456e1>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b456e1>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<ffffffff813f727a>] panic+0x1d9/0x3bd kernel/panic.c:180
 [<ffffffff8131bea8>] check_hung_task kernel/hung_task.c:126 [inline]
 [<ffffffff8131bea8>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8131bea8>] watchdog+0x608/0xa40 kernel/hung_task.c:239
 [<ffffffff81141e38>] kthread+0x278/0x310 kernel/kthread.c:211
 [<ffffffff8281355c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Kernel Offset: disabled
Rebooting in 86400 seconds..