INFO: task kworker/1:2:83 blocked for more than 143 seconds. Not tainted 5.7.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:2 D22968 83 2 0x80004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:3367 [inline] __schedule+0x892/0x1d80 kernel/sched/core.c:4083 lock_downgrade+0x720/0x720 kernel/locking/lockdep.c:4599 __sched_text_start+0x8/0x8 mark_held_locks+0xe0/0xe0 kernel/locking/lockdep.c:3620 __trace_hardirqs_on_caller kernel/locking/lockdep.c:3657 [inline] lockdep_hardirqs_on+0x3c7/0x5d0 kernel/locking/lockdep.c:3702 schedule+0xcd/0x2b0 kernel/sched/core.c:4158 schedule_timeout+0x501/0x7d0 kernel/time/timer.c:1874 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] hlock_class kernel/locking/lockdep.c:179 [inline] mark_lock+0x12b/0x1510 kernel/locking/lockdep.c:3912 find_held_lock+0x2d/0x110 kernel/locking/lockdep.c:4458 usleep_range+0x160/0x160 kernel/time/timer.c:2093 print_usage_bug+0x200/0x200 kernel/locking/lockdep.c:101 flush_workqueue+0x3f7/0x14f0 kernel/workqueue.c:2829 lock_downgrade+0x720/0x720 kernel/locking/lockdep.c:4599 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:3628 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x1f/0x30 kernel/locking/spinlock.c:199 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x16f/0x280 kernel/sched/completion.c:138 atomic64_cmpxchg include/asm-generic/atomic-instrumented.h:1463 [inline] atomic_long_cmpxchg_release include/asm-generic/atomic-long.h:424 [inline] __mutex_unlock_slowpath+0xe2/0x660 kernel/locking/mutex.c:1249 wait_for_completion_interruptible+0x2f0/0x2f0 kernel/sched/completion.c:89 flush_workqueue_prep_pwqs+0x298/0x4e0 kernel/workqueue.c:2757 to_kthread kernel/kthread.c:76 [inline] kthread_data+0x4f/0xc0 kernel/kthread.c:165 check_flush_dependency+0x2e2/0x400 kernel/workqueue.c:2606 flush_workqueue+0x403/0x14f0 kernel/workqueue.c:2831 spin_lock_irq include/linux/spinlock.h:378 [inline] usb_kill_anchored_urbs+0x22/0x1c0 drivers/usb/core/urb.c:788 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] hlock_class kernel/locking/lockdep.c:179 [inline] mark_lock+0x12b/0x1510 kernel/locking/lockdep.c:3912 pwq_unbound_release_workfn+0x2d0/0x2d0 include/linux/list.h:135 print_usage_bug+0x200/0x200 kernel/locking/lockdep.c:101 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:3628 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x1f/0x30 kernel/locking/spinlock.c:199 hif_detach_htc drivers/net/wireless/ath/ath6kl/usb.c:856 [inline] ath6kl_usb_power_off+0x33/0x40 drivers/net/wireless/ath/ath6kl/usb.c:1055 hif_detach_htc drivers/net/wireless/ath/ath6kl/usb.c:856 [inline] ath6kl_usb_power_off+0x33/0x40 drivers/net/wireless/ath/ath6kl/usb.c:1055 ath6kl_hif_power_off drivers/net/wireless/ath/ath6kl/hif-ops.h:143 [inline] ath6kl_core_init drivers/net/wireless/ath/ath6kl/core.c:255 [inline] ath6kl_core_init+0x236/0x10d0 drivers/net/wireless/ath/ath6kl/core.c:66 set_track mm/kasan/common.c:57 [inline] __kasan_kmalloc mm/kasan/common.c:495 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:468 lockdep_init_map_waits+0x26a/0x7c0 kernel/locking/lockdep.c:4138 ath6kl_core_destroy+0x20/0x20 drivers/net/wireless/ath/ath6kl/core.c:359 memcpy+0x39/0x60 mm/kasan/common.c:107 ath6kl_core_create+0x83d/0xa00 drivers/net/wireless/ath/ath6kl/core.c:324 ath6kl_usb_probe+0xc8f/0x1190 drivers/net/wireless/ath/ath6kl/usb.c:1155 usb_probe_interface+0x310/0x800 drivers/usb/core/driver.c:374 usb_probe_device+0x230/0x230 drivers/usb/core/driver.c:274 really_probe+0x290/0xac0 drivers/base/dd.c:520 driver_probe_device+0x223/0x350 drivers/base/dd.c:697 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:804 driver_allows_async_probing+0x160/0x160 drivers/base/dd.c:737 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431 bus_rescan_devices+0x20/0x20 drivers/base/bus.c:711 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x39/0x40 kernel/locking/spinlock.c:191 __trace_hardirqs_on_caller kernel/locking/lockdep.c:3657 [inline] lockdep_hardirqs_on+0x3c7/0x5d0 kernel/locking/lockdep.c:3702 __device_attach+0x21a/0x390 drivers/base/dd.c:870 device_bind_driver+0xd0/0xd0 drivers/base/dd.c:443 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0x1367/0x1c40 drivers/base/core.c:2538 wait_for_completion+0x280/0x280 device_link_remove+0x110/0x110 drivers/base/core.c:628 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x39/0x40 kernel/locking/spinlock.c:191 usb_set_configuration+0xed4/0x1850 drivers/usb/core/message.c:2032 usb_generic_driver_probe+0x9d/0xe0 drivers/usb/core/generic.c:241 usb_probe_device+0xd9/0x230 drivers/usb/core/driver.c:272 usb_suspend+0x600/0x600 include/linux/pm_wakeup.h:84 really_probe+0x290/0xac0 drivers/base/dd.c:520 driver_probe_device+0x223/0x350 drivers/base/dd.c:697 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:804 driver_allows_async_probing+0x160/0x160 drivers/base/dd.c:737 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431 bus_rescan_devices+0x20/0x20 drivers/base/bus.c:711 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x39/0x40 kernel/locking/spinlock.c:191 __trace_hardirqs_on_caller kernel/locking/lockdep.c:3657 [inline] lockdep_hardirqs_on+0x3c7/0x5d0 kernel/locking/lockdep.c:3702 __device_attach+0x21a/0x390 drivers/base/dd.c:870 device_bind_driver+0xd0/0xd0 drivers/base/dd.c:443 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491 device_add+0x1367/0x1c40 drivers/base/core.c:2538 device_link_remove+0x110/0x110 drivers/base/core.c:628 usb_new_device.cold+0x552/0xf6e drivers/usb/core/hub.c:2553 hub_disconnect+0x4a0/0x4a0 drivers/usb/core/hub.c:1735 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:3628 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x1f/0x30 kernel/locking/spinlock.c:199 hub_port_connect drivers/usb/core/hub.c:5207 [inline] hub_port_connect_change drivers/usb/core/hub.c:5347 [inline] port_event drivers/usb/core/hub.c:5493 [inline] hub_event+0x226d/0x43c0 drivers/usb/core/hub.c:5575 hub_port_debounce+0x350/0x350 drivers/usb/core/hub.c:4440 usermodehelper_read_unlock+0x10/0x20 kernel/umh.c:292 lock_is_held include/linux/lockdep.h:406 [inline] rcu_read_lock_sched_held+0x9c/0xd0 kernel/rcu/update.c:121 rcu_read_lock_bh_held+0xb0/0xb0 kernel/rcu/update.c:333 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x1f/0x30 kernel/locking/spinlock.c:199 process_one_work+0x965/0x1630 kernel/workqueue.c:2268 lock_release+0x720/0x720 kernel/locking/lockdep.c:4689 pwq_dec_nr_in_flight+0x310/0x310 kernel/workqueue.c:1198 rwlock_bug.part.0+0x90/0x90 include/linux/sched.h:1329 wq_worker_sleeping+0x4e/0x200 kernel/workqueue.c:874 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 process_one_work+0x1630/0x1630 kernel/workqueue.c:1029 kthread+0x326/0x430 kernel/kthread.c:268 kthread_create_on_node+0xf0/0xf0 kernel/kthread.c:405 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 INFO: task kworker/0:6:3228 blocked for more than 143 seconds. Not tainted 5.7.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:6 D23344 3228 2 0x80004000 Workqueue: events request_firmware_work_func Call Trace: context_switch kernel/sched/core.c:3367 [inline] __schedule+0x892/0x1d80 kernel/sched/core.c:4083 lock_downgrade+0x720/0x720 kernel/locking/lockdep.c:4599 __sched_text_start+0x8/0x8 __trace_hardirqs_on_caller kernel/locking/lockdep.c:3657 [inline] lockdep_hardirqs_on+0x3c7/0x5d0 kernel/locking/lockdep.c:3702 schedule+0xcd/0x2b0 kernel/sched/core.c:4158 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4217 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x87c/0x1360 kernel/locking/mutex.c:1103 device_lock include/linux/device.h:768 [inline] ath9k_hif_usb_firmware_fail drivers/net/wireless/ath/ath9k/hif_usb.c:1077 [inline] ath9k_hif_usb_firmware_cb+0x388/0x510 drivers/net/wireless/ath/ath9k/hif_usb.c:1210 mutex_trylock+0x2c0/0x2c0 kernel/locking/mutex.c:126 ath9k_hif_usb_firmware_fail drivers/net/wireless/ath/ath9k/hif_usb.c:1074 [inline] ath9k_hif_usb_firmware_cb+0x36d/0x510 drivers/net/wireless/ath/ath9k/hif_usb.c:1210 print_usage_bug+0x200/0x200 kernel/locking/lockdep.c:101 atomic_try_cmpxchg include/asm-generic/atomic-instrumented.h:694 [inline] queued_spin_lock include/asm-generic/qspinlock.h:78 [inline] do_raw_spin_lock+0x129/0x290 kernel/locking/spinlock_debug.c:113 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:3628 device_lock include/linux/device.h:768 [inline] ath9k_hif_usb_firmware_fail drivers/net/wireless/ath/ath9k/hif_usb.c:1077 [inline] ath9k_hif_usb_firmware_cb+0x388/0x510 drivers/net/wireless/ath/ath9k/hif_usb.c:1210 device_lock include/linux/device.h:768 [inline] ath9k_hif_usb_firmware_fail drivers/net/wireless/ath/ath9k/hif_usb.c:1077 [inline] ath9k_hif_usb_firmware_cb+0x388/0x510 drivers/net/wireless/ath/ath9k/hif_usb.c:1210 ath9k_hif_usb_resume+0x320/0x320 drivers/net/wireless/ath/ath9k/hif_usb.c:1400 request_firmware_work_func+0x126/0x242 drivers/base/firmware_loader/main.c:1005 request_firmware_into_buf+0x90/0x90 drivers/base/firmware_loader/main.c:968 lock_is_held include/linux/lockdep.h:406 [inline] rcu_read_lock_sched_held+0x9c/0xd0 kernel/rcu/update.c:121 rcu_read_lock_bh_held+0xb0/0xb0 kernel/rcu/update.c:333 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x1f/0x30 kernel/locking/spinlock.c:199 process_one_work+0x965/0x1630 kernel/workqueue.c:2268 lock_release+0x720/0x720 kernel/locking/lockdep.c:4689 pwq_dec_nr_in_flight+0x310/0x310 kernel/workqueue.c:1198 rwlock_bug.part.0+0x90/0x90 include/linux/sched.h:1329 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 process_one_work+0x1630/0x1630 kernel/workqueue.c:1029 kthread+0x326/0x430 kernel/kthread.c:268 kthread_create_on_node+0xf0/0xf0 kernel/kthread.c:405 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 Showing all locks held in the system: 3 locks held by kworker/0:1/12: #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x844/0x1630 kernel/workqueue.c:2239 #1: ffff8881da21fdc0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x878/0x1630 kernel/workqueue.c:2243 #2: ffff8881d4f28218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #2: ffff8881d4f28218 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x43c0 drivers/usb/core/hub.c:5521 6 locks held by kworker/1:0/17: #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x844/0x1630 kernel/workqueue.c:2239 #1: ffff8881da25fdc0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x878/0x1630 kernel/workqueue.c:2243 #2: ffff8881d4e50218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #2: ffff8881d4e50218 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x43c0 drivers/usb/core/hub.c:5521 #3: ffff8881d1374218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #3: ffff8881d1374218 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:847 #4: ffff8881c3fef1a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #4: ffff8881c3fef1a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:847 #5: ffff8881cb273628 (&priv->usb_buf_mutex){+.+.}-{3:3}, at: rtl8xxxu_read32+0x54/0x130 drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c:695 1 lock held by khungtaskd/23: #0: ffffffff87111260 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x264 kernel/locking/lockdep.c:5754 5 locks held by kworker/1:2/83: #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x844/0x1630 kernel/workqueue.c:2239 #1: ffff8881d8b0fdc0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x878/0x1630 kernel/workqueue.c:2243 #2: ffff8881d4ea8218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #2: ffff8881d4ea8218 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x43c0 drivers/usb/core/hub.c:5521 #3: ffff8881cb47b218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #3: ffff8881cb47b218 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:847 #4: ffff8881ac9201a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #4: ffff8881ac9201a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:847 1 lock held by in:imklog/260: 2 locks held by agetty/269: #0: ffff8881ce823098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267 #1: ffffc9000061c2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x220/0x1b30 drivers/tty/n_tty.c:2156 5 locks held by kworker/1:4/3077: #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x844/0x1630 kernel/workqueue.c:2239 #1: ffff8881acf87dc0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x878/0x1630 kernel/workqueue.c:2243 #2: ffff8881d4f50218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #2: ffff8881d4f50218 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x43c0 drivers/usb/core/hub.c:5521 #3: ffff8881cf758218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #3: ffff8881cf758218 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:847 #4: ffff8881d8df61a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #4: ffff8881d8df61a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:847 2 locks held by kworker/1:6/3100: #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x844/0x1630 kernel/workqueue.c:2239 #1: ffff8881d5bffdc0 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x878/0x1630 kernel/workqueue.c:2243 5 locks held by kworker/0:5/3123: #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8881d8994138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x844/0x1630 kernel/workqueue.c:2239 #1: ffff8881d8c8fdc0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x878/0x1630 kernel/workqueue.c:2243 #2: ffff8881d4ec8218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #2: ffff8881d4ec8218 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x43c0 drivers/usb/core/hub.c:5521 #3: ffff8881cfc3a218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #3: ffff8881cfc3a218 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:847 #4: ffff8881d51981a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #4: ffff8881d51981a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:847 3 locks held by kworker/0:6/3228: #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x844/0x1630 kernel/workqueue.c:2239 #1: ffff8881cf71fdc0 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x878/0x1630 kernel/workqueue.c:2243 #2: ffff8881d4ea8218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #2: ffff8881d4ea8218 (&dev->mutex){....}-{3:3}, at: ath9k_hif_usb_firmware_fail drivers/net/wireless/ath/ath9k/hif_usb.c:1077 [inline] #2: ffff8881d4ea8218 (&dev->mutex){....}-{3:3}, at: ath9k_hif_usb_firmware_cb+0x388/0x510 drivers/net/wireless/ath/ath9k/hif_usb.c:1210 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 5.7.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xef/0x16e lib/dump_stack.c:118 irq_force_complete_move.cold+0x13/0x47 arch/x86/kernel/apic/vector.c:1023 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 lapic_can_unplug_cpu.cold+0x3b/0x3b nmi_trigger_cpumask_backtrace+0x1db/0x207 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xa99/0xfd0 kernel/hung_task.c:289 reset_hung_task_detector+0x30/0x30 kernel/hung_task.c:243 kthread+0x326/0x430 kernel/kthread.c:268 kthread_create_on_node+0xf0/0xf0 kernel/kthread.c:405 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 1 skipped: idling at default_idle+0x28/0x300 arch/x86/kernel/process.c:697