BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 140s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x100
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=9 refcnt=10
in-flight: 18981:legacy_dvb_usb_read_remote_control
pending: legacy_dvb_usb_read_remote_control, dvb_usb_read_remote_control, 2*legacy_dvb_usb_read_remote_control, 2*dvb_usb_read_remote_control, vmstat_shepherd, free_obj_work
workqueue events_unbound: flags=0x2
pwq 8: cpus=0-1 flags=0x4 nice=0 active=2 refcnt=3
in-flight: 23259:call_usermodehelper_exec_work
pending: flush_memcg_stats_dwork
workqueue events_power_efficient: flags=0x180
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=9 refcnt=10
pending: 2*neigh_managed_work, do_cache_clean, 2*neigh_periodic_work, 3*check_lifetime, gc_worker
workqueue rcu_gp: flags=0x108
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2
pending: srcu_invoke_callbacks
workqueue mm_percpu_wq: flags=0x8
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2
pending: vmstat_update
workqueue kblockd: flags=0x18
pwq 3: cpus=0 node=0 flags=0x0 nice=-20 active=1 refcnt=2
pending: blk_mq_timeout_work
workqueue usb_hub_wq: flags=0x104
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=4 refcnt=5
in-flight: 8883:hub_event hub_event ,23786:hub_event hub_event
pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=6 refcnt=7
in-flight: 23:hub_event hub_event ,13052:hub_event ,10737:hub_event hub_event
pending: hub_event
pool 2: cpus=0 node=0 flags=0x0 nice=0 hung=140s workers=13 idle: 12082 21510 10 23137 11151 5228 5617 16361 8884 23854
pool 6: cpus=1 node=0 flags=0x0 nice=0 hung=0s workers=11 idle: 19495 16212 22913 23338 21205
pool 8: cpus=0-1 flags=0x4 nice=0 hung=0s workers=5 idle: 9044 32 8374 23784
Showing backtraces of running workers in stalled CPU-bound worker pools:
pool 2:
task:kworker/0:2 state:R running task stack:22984 pid:18981 tgid:18981 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: events legacy_dvb_usb_read_remote_control
Call Trace:
context_switch kernel/sched/core.c:5260 [inline]
__schedule+0xeb0/0x3e50 kernel/sched/core.c:6867
preempt_schedule_common+0x42/0xc0 kernel/sched/core.c:7051
__cond_resched+0x22/0x30 kernel/sched/core.c:7378
_cond_resched include/linux/sched.h:2061 [inline]
process_one_work+0xba8/0x1840 kernel/workqueue.c:3290
process_scheduled_works kernel/workqueue.c:3340 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3421
kthread+0x3b3/0x730 kernel/kthread.c:463
ret_from_fork+0x6c3/0xa20 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
pool 2:
task:kworker/0:7 state:R running task stack:22120 pid:8883 tgid:8883 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5260 [inline]
__schedule+0xeb0/0x3e50 kernel/sched/core.c:6867
__schedule_loop kernel/sched/core.c:6949 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:6964
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
msleep+0x32/0x50 kernel/time/sleep_timeout.c:318
hub_port_wait_reset drivers/usb/core/hub.c:2965 [inline]
hub_port_reset+0x3fe/0x1c60 drivers/usb/core/hub.c:3093
hub_port_init+0x6da/0x3810 drivers/usb/core/hub.c:5056
usb_reset_and_verify_device+0x539/0x1110 drivers/usb/core/hub.c:6215
finish_port_resume drivers/usb/core/hub.c:3665 [inline]
usb_port_resume+0x12bf/0x1970 drivers/usb/core/hub.c:3865
usb_generic_driver_resume+0x41/0xa0 drivers/usb/core/generic.c:317
usb_resume_device drivers/usb/core/driver.c:1304 [inline]
usb_resume_both+0x72b/0x9a0 drivers/usb/core/driver.c:1549
__rpm_callback+0xc8/0x620 drivers/base/power/runtime.c:406
rpm_callback+0x16a/0x1b0 drivers/base/power/runtime.c:460
rpm_resume+0xcec/0x12f0 drivers/base/power/runtime.c:939
__pm_runtime_resume+0xb6/0x170 drivers/base/power/runtime.c:1197
pm_runtime_get_active include/linux/pm_runtime.h:520 [inline]
pm_runtime_resume_and_get include/linux/pm_runtime.h:539 [inline]
usb_autoresume_device+0x23/0xe0 drivers/usb/core/driver.c:1760
usb_remote_wakeup+0x8f/0x100 drivers/usb/core/hub.c:3889
hub_port_connect_change drivers/usb/core/hub.c:5693 [inline]
port_event drivers/usb/core/hub.c:5871 [inline]
hub_event+0x2533/0x4af0 drivers/usb/core/hub.c:5953
process_one_work+0x9c2/0x1840 kernel/workqueue.c:3257
process_scheduled_works kernel/workqueue.c:3340 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3421
kthread+0x3b3/0x730 kernel/kthread.c:463
ret_from_fork+0x6c3/0xa20 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
pool 2:
task:kworker/0:11 state:R running task stack:23512 pid:23786 tgid:23786 ppid:2 task_flags:0x4208060 flags:0x00080010
Workqueue: usb_hub_wq hub_event
Call Trace:
sched_show_task kernel/sched/core.c:7821 [inline]
sched_show_task+0x471/0x610 kernel/sched/core.c:7796
show_cpu_pool_hog kernel/workqueue.c:7535 [inline]
show_cpu_pools_hogs kernel/workqueue.c:7555 [inline]
wq_watchdog_timer_fn.cold+0x3f0/0x4e8 kernel/workqueue.c:7638
call_timer_fn+0x19a/0x590 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers+0x757/0xac0 kernel/time/timer.c:2373
__run_timer_base kernel/time/timer.c:2385 [inline]
__run_timer_base kernel/time/timer.c:2377 [inline]
run_timer_base+0x114/0x190 kernel/time/timer.c:2394
run_timer_softirq+0x24/0x50 kernel/time/timer.c:2405
handle_softirqs+0x1dd/0x8f0 kernel/softirq.c:622
do_softirq kernel/softirq.c:523 [inline]
do_softirq+0xac/0xe0 kernel/softirq.c:510
__local_bh_enable_ip+0xf8/0x120 kernel/softirq.c:450
local_bh_enable include/linux/bottom_half.h:33 [inline]
__alloc_skb+0x381/0x410 net/core/skbuff.c:674
__netdev_alloc_skb+0x7a/0x8f0 net/core/skbuff.c:754
netdev_alloc_skb include/linux/skbuff.h:3484 [inline]
dev_alloc_skb include/linux/skbuff.h:3497 [inline]
ath6kl_usb_post_recv_transfers.constprop.0+0x55/0x3d0 drivers/net/wireless/ath/ath6kl/usb.c:428
ath6kl_usb_start_recv_pipes drivers/net/wireless/ath/ath6kl/usb.c:498 [inline]
hif_start drivers/net/wireless/ath/ath6kl/usb.c:703 [inline]
ath6kl_usb_power_on+0x8e/0x160 drivers/net/wireless/ath/ath6kl/usb.c:1062
ath6kl_hif_power_on drivers/net/wireless/ath/ath6kl/hif-ops.h:136 [inline]
ath6kl_core_init+0x173/0x11b0 drivers/net/wireless/ath/ath6kl/core.c:97
ath6kl_usb_probe+0xcd0/0x13e0 drivers/net/wireless/ath/ath6kl/usb.c:1168
usb_probe_interface+0x303/0x8f0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:581 [inline]
really_probe+0x241/0xa60 drivers/base/dd.c:659
__driver_probe_device+0x1de/0x400 drivers/base/dd.c:801
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831
__device_attach_driver+0x1df/0x340 drivers/base/dd.c:959
bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
__device_attach+0x1e4/0x4d0 drivers/base/dd.c:1031
device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1086
bus_probe_device+0x64/0x160 drivers/base/bus.c:574
device_add+0x11d9/0x1950 drivers/base/core.c:3689
usb_set_configuration+0xd97/0x1c60 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250
usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:581 [inline]
really_probe+0x241/0xa60 drivers/base/dd.c:659
__driver_probe_device+0x1de/0x400 drivers/base/dd.c:801
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:831
__device_attach_driver+0x1df/0x340 drivers/base/dd.c:959
bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
__device_attach+0x1e4/0x4d0 drivers/base/dd.c:1031
device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1086
bus_probe_device+0x64/0x160 drivers/base/bus.c:574
device_add+0x11d9/0x1950 drivers/base/core.c:3689
usb_new_device.cold+0x685/0x115c drivers/usb/core/hub.c:2695
hub_port_connect drivers/usb/core/hub.c:5567 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
port_event drivers/usb/core/hub.c:5871 [inline]
hub_event+0x314d/0x4af0 drivers/usb/core/hub.c:5953
process_one_work+0x9c2/0x1840 kernel/workqueue.c:3257
process_scheduled_works kernel/workqueue.c:3340 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3421
kthread+0x3b3/0x730 kernel/kthread.c:463
ret_from_fork+0x6c3/0xa20 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246