INFO: task kworker/1:3:5663 blocked for more than 143 seconds. Not tainted 5.1.0-rc4-319354-g9a33b36 #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:3 D24656 5663 2 0x80000000 Workqueue: usb_hub_wq hub_event Call Trace: schedule+0x8f/0x180 kernel/sched/core.c:3562 schedule_preempt_disabled+0x11/0x20 kernel/sched/core.c:3620 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x800/0x12b0 kernel/locking/mutex.c:1072 device_lock include/linux/device.h:1207 [inline] hub_event+0x18a/0x3b00 drivers/usb/core/hub.c:5378 process_one_work+0x90f/0x1580 kernel/workqueue.c:2269 worker_thread+0x9b/0xe20 kernel/workqueue.c:2415 kthread+0x313/0x420 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Showing all locks held in the system: 7 locks held by kworker/1:0/17: #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x81f/0x1580 kernel/workqueue.c:2240 #1: 000000000dcdad5d ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x853/0x1580 kernel/workqueue.c:2244 #2: 0000000049aca40f (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 0000000049aca40f (&dev->mutex){....}, at: hub_event+0x18a/0x3b00 drivers/usb/core/hub.c:5378 #3: 00000000b53bab4b (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #3: 00000000b53bab4b (&dev->mutex){....}, at: __device_attach+0x80/0x3a0 drivers/base/dd.c:821 #4: 000000008960009b (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #4: 000000008960009b (&dev->mutex){....}, at: __device_attach+0x80/0x3a0 drivers/base/dd.c:821 #5: 00000000d5b265d8 (&bus->mdio_lock){+.+.}, at: mdiobus_read+0x48/0x80 drivers/net/phy/mdio_bus.c:616 #6: 000000008016faab (&dev->phy_mutex){+.+.}, at: asix_mdio_read+0x9d/0x2d0 drivers/net/usb/asix_common.c:465 6 locks held by kworker/1:1/22: #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x81f/0x1580 kernel/workqueue.c:2240 #1: 000000002110a38e ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x853/0x1580 kernel/workqueue.c:2244 #2: 000000000b56ba88 (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 000000000b56ba88 (&dev->mutex){....}, at: hub_event+0x18a/0x3b00 drivers/usb/core/hub.c:5378 #3: 000000009597b574 (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #3: 000000009597b574 (&dev->mutex){....}, at: __device_attach+0x80/0x3a0 drivers/base/dd.c:821 #4: 00000000f4ecd067 (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #4: 00000000f4ecd067 (&dev->mutex){....}, at: __device_attach+0x80/0x3a0 drivers/base/dd.c:821 #5: 0000000037b65b62 (&dev->phy_mutex){+.+.}, at: asix_mdio_read+0x9d/0x2d0 drivers/net/usb/asix_common.c:465 1 lock held by khungtaskd/23: #0: 000000003bc792dd (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x269 kernel/locking/lockdep.c:5059 5 locks held by kworker/0:2/532: #0: 0000000015807f5c ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 0000000015807f5c ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000015807f5c ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 0000000015807f5c ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 0000000015807f5c ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 0000000015807f5c ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 0000000015807f5c ((wq_completion)events){+.+.}, at: process_one_work+0x81f/0x1580 kernel/workqueue.c:2240 #1: 00000000af9697c8 ((work_completion)(&fw_work->work)){+.+.}, at: process_one_work+0x853/0x1580 kernel/workqueue.c:2244 #2: 00000000da667762 (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 00000000da667762 (&dev->mutex){....}, at: ath9k_hif_usb_firmware_fail drivers/net/wireless/ath/ath9k/hif_usb.c:1077 [inline] #2: 00000000da667762 (&dev->mutex){....}, at: ath9k_hif_usb_firmware_cb+0x377/0x500 drivers/net/wireless/ath/ath9k/hif_usb.c:1210 #3: 00000000c2e2b9a8 (&dev->mutex){....}, at: device_release_driver_internal+0x28/0x4f0 drivers/base/dd.c:1110 #4: 000000006d5dd66e (hcd->bandwidth_mutex){+.+.}, at: usb_set_configuration+0x4b7/0x1740 drivers/usb/core/message.c:1884 2 locks held by getty/5606: #0: 0000000097f1c8b7 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x27/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000899ca92b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21c/0x1a60 drivers/tty/n_tty.c:2156 2 locks held by getty/5607: #0: 0000000077e5bb26 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x27/0x80 drivers/tty/tty_ldisc.c:272 #1: 0000000064ce1465 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21c/0x1a60 drivers/tty/n_tty.c:2156 2 locks held by getty/5608: #0: 00000000794ca20a (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x27/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000e5dbe30d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21c/0x1a60 drivers/tty/n_tty.c:2156 2 locks held by getty/5609: #0: 00000000c67c1b21 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x27/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000ef913519 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21c/0x1a60 drivers/tty/n_tty.c:2156 2 locks held by getty/5610: #0: 0000000016de38f0 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x27/0x80 drivers/tty/tty_ldisc.c:272 #1: 0000000035d16cc5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21c/0x1a60 drivers/tty/n_tty.c:2156 2 locks held by getty/5611: #0: 000000005d3ca92d (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x27/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000784aeb66 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21c/0x1a60 drivers/tty/n_tty.c:2156 2 locks held by getty/5612: #0: 0000000039c9e89a (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x27/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000bb7238f2 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21c/0x1a60 drivers/tty/n_tty.c:2156 5 locks held by kworker/1:2/5662: #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x81f/0x1580 kernel/workqueue.c:2240 #1: 00000000ca1a57d9 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x853/0x1580 kernel/workqueue.c:2244 #2: 0000000054420ce4 (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 0000000054420ce4 (&dev->mutex){....}, at: hub_event+0x18a/0x3b00 drivers/usb/core/hub.c:5378 #3: 0000000098691aac (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #3: 0000000098691aac (&dev->mutex){....}, at: __device_attach+0x80/0x3a0 drivers/base/dd.c:821 #4: 00000000f42cd03c (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #4: 00000000f42cd03c (&dev->mutex){....}, at: __device_attach+0x80/0x3a0 drivers/base/dd.c:821 3 locks held by kworker/1:3/5663: #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x81f/0x1580 kernel/workqueue.c:2240 #1: 00000000eca16b22 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x853/0x1580 kernel/workqueue.c:2244 #2: 00000000da667762 (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 00000000da667762 (&dev->mutex){....}, at: hub_event+0x18a/0x3b00 drivers/usb/core/hub.c:5378 5 locks held by kworker/1:5/5718: #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x81f/0x1580 kernel/workqueue.c:2240 #1: 000000000dbe513f ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x853/0x1580 kernel/workqueue.c:2244 #2: 00000000bf8343d0 (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 00000000bf8343d0 (&dev->mutex){....}, at: hub_event+0x18a/0x3b00 drivers/usb/core/hub.c:5378 #3: 00000000a375ce08 (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #3: 00000000a375ce08 (&dev->mutex){....}, at: __device_attach+0x80/0x3a0 drivers/base/dd.c:821 #4: 000000000de1b2ae (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #4: 000000000de1b2ae (&dev->mutex){....}, at: __device_attach+0x80/0x3a0 drivers/base/dd.c:821 6 locks held by kworker/0:4/5864: #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 00000000647296ec ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x81f/0x1580 kernel/workqueue.c:2240 #1: 0000000033b0d5c6 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x853/0x1580 kernel/workqueue.c:2244 #2: 00000000efb688db (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 00000000efb688db (&dev->mutex){....}, at: hub_event+0x18a/0x3b00 drivers/usb/core/hub.c:5378 #3: 00000000b27e5746 (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #3: 00000000b27e5746 (&dev->mutex){....}, at: __device_attach+0x80/0x3a0 drivers/base/dd.c:821 #4: 00000000903f97fd (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #4: 00000000903f97fd (&dev->mutex){....}, at: __device_attach+0x80/0x3a0 drivers/base/dd.c:821 #5: 00000000e842690b (hcd->bandwidth_mutex){+.+.}, at: usb_reset_configuration+0x12c/0x8b0 drivers/usb/core/message.c:1537 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 5.1.0-rc4-319354-g9a33b36 #3 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+0xe8/0x16e lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x48/0x87 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1bd lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0x98e/0xe20 kernel/hung_task.c:288 kthread+0x313/0x420 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5633 Comm: syz-fuzzer Not tainted 5.1.0-rc4-319354-g9a33b36 #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0033:0x41d12b Code: 00 00 48 83 ec 70 48 89 6c 24 68 48 8d 6c 24 68 48 8b 05 b0 71 32 01 48 89 44 24 60 48 8b 0d ac 71 32 01 48 89 4c 24 58 31 d2 <48> 8b 9c 24 80 00 00 00 48 39 da 0f 83 2b 01 00 00 48 89 d6 48 c1 RSP: 002b:000000c420181e10 EFLAGS: 00000246 RAX: 000000c420000000 RBX: 0000000000040000 RCX: 000000c424800000 RDX: 0000000000009f80 RSI: 0000000000009f80 RDI: 00007fd9aafc7000 RBP: 000000c420181e78 R08: 0000000000000008 R09: 000000000168a7c0 R10: 00000000008c170a R11: 000000000001362c R12: 000000c420935a78 R13: 000000000000001f R14: 0000000000bfa3a0 R15: 00000000000031cf FS: 000000c42003f890 GS: 0000000000000000