INFO: task kworker/0:0:5 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/0:0 D24304 5 2 0x80000000 Workqueue: usb_hub_wq hub_event Call Trace: schedule+0x8f/0x180 kernel/sched/core.c:3562 usb_kill_urb drivers/usb/core/urb.c:695 [inline] usb_kill_urb+0x22a/0x2c0 drivers/usb/core/urb.c:687 usb_start_wait_urb+0x257/0x4d0 drivers/usb/core/message.c:63 usb_internal_control_msg drivers/usb/core/message.c:101 [inline] usb_control_msg+0x321/0x4a0 drivers/usb/core/message.c:152 __usbnet_read_cmd+0xed/0x3c0 drivers/net/usb/usbnet.c:1988 usbnet_read_cmd+0x97/0x100 drivers/net/usb/usbnet.c:2046 asix_read_cmd+0x84/0xc0 drivers/net/usb/asix_common.c:37 asix_mdio_read+0x12e/0x2d0 drivers/net/usb/asix_common.c:471 asix_phy_reset.isra.0+0x10e/0x180 drivers/net/usb/asix_devices.c:227 ax88172_bind drivers/net/usb/asix_devices.c:284 [inline] ax88172_bind+0x40b/0x5cc drivers/net/usb/asix_devices.c:238 usbnet_probe+0xb59/0x2590 drivers/net/usb/usbnet.c:1728 usb_probe_interface+0x31d/0x820 drivers/usb/core/driver.c:361 really_probe+0x2da/0xb10 drivers/base/dd.c:509 driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 __device_attach+0x223/0x3a0 drivers/base/dd.c:844 bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 device_add+0xad2/0x16e0 drivers/base/core.c:2106 usb_set_configuration+0xdf7/0x1740 drivers/usb/core/message.c:2021 generic_probe+0xa2/0xda drivers/usb/core/generic.c:210 usb_probe_device+0xc0/0x150 drivers/usb/core/driver.c:266 really_probe+0x2da/0xb10 drivers/base/dd.c:509 driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 __device_attach+0x223/0x3a0 drivers/base/dd.c:844 bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 device_add+0xad2/0x16e0 drivers/base/core.c:2106 usb_new_device.cold+0x537/0xccf drivers/usb/core/hub.c:2534 hub_port_connect drivers/usb/core/hub.c:5089 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0x138e/0x3b00 drivers/usb/core/hub.c:5432 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 INFO: task kworker/1:0:17 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/1:0 D21344 17 2 0x80000000 Workqueue: usb_hub_wq hub_event Call Trace: schedule+0x8f/0x180 kernel/sched/core.c:3562 usb_kill_urb drivers/usb/core/urb.c:695 [inline] usb_kill_urb+0x22a/0x2c0 drivers/usb/core/urb.c:687 usb_start_wait_urb+0x257/0x4d0 drivers/usb/core/message.c:63 usb_internal_control_msg drivers/usb/core/message.c:101 [inline] usb_control_msg+0x321/0x4a0 drivers/usb/core/message.c:152 hub_port_init+0x81d/0x2d30 drivers/usb/core/hub.c:4655 hub_port_connect drivers/usb/core/hub.c:5021 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0x11b8/0x3b00 drivers/usb/core/hub.c:5432 process_one_work+0x90f/0x1580 kernel/workqueue.c:2269 process_scheduled_works kernel/workqueue.c:2331 [inline] worker_thread+0x7b0/0xe20 kernel/workqueue.c:2417 kthread+0x313/0x420 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 INFO: task kworker/1:1:21 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/1:1 D23728 21 2 0x80000000 Workqueue: usb_hub_wq hub_event Call Trace: schedule+0x8f/0x180 kernel/sched/core.c:3562 usb_kill_urb drivers/usb/core/urb.c:695 [inline] usb_kill_urb+0x22a/0x2c0 drivers/usb/core/urb.c:687 usb_start_wait_urb+0x257/0x4d0 drivers/usb/core/message.c:63 usb_internal_control_msg drivers/usb/core/message.c:101 [inline] usb_control_msg+0x321/0x4a0 drivers/usb/core/message.c:152 usb_get_descriptor+0xc6/0x1c0 drivers/usb/core/message.c:647 usb_get_device_descriptor+0x86/0xf0 drivers/usb/core/message.c:917 hub_port_init+0xac1/0x2d30 drivers/usb/core/hub.c:4750 hub_port_connect drivers/usb/core/hub.c:5021 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0x11b8/0x3b00 drivers/usb/core/hub.c:5432 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 INFO: task kworker/1:2:531 blocked for more than 144 seconds. Not tainted 5.1.0-rc4-319354-g9a33b36 #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:2 D26688 531 2 0x80000000 Workqueue: usb_hub_wq hub_event Call Trace: schedule+0x8f/0x180 kernel/sched/core.c:3562 usb_kill_urb drivers/usb/core/urb.c:695 [inline] usb_kill_urb+0x22a/0x2c0 drivers/usb/core/urb.c:687 usb_start_wait_urb+0x257/0x4d0 drivers/usb/core/message.c:63 usb_internal_control_msg drivers/usb/core/message.c:101 [inline] usb_control_msg+0x321/0x4a0 drivers/usb/core/message.c:152 hub_port_init+0x81d/0x2d30 drivers/usb/core/hub.c:4655 hub_port_connect drivers/usb/core/hub.c:5021 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0x11b8/0x3b00 drivers/usb/core/hub.c:5432 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 INFO: task kworker/0:3:587 blocked for more than 144 seconds. Not tainted 5.1.0-rc4-319354-g9a33b36 #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:3 D22848 587 2 0x80000000 Workqueue: usb_hub_wq hub_event Call Trace: schedule+0x8f/0x180 kernel/sched/core.c:3562 usb_kill_urb drivers/usb/core/urb.c:695 [inline] usb_kill_urb+0x22a/0x2c0 drivers/usb/core/urb.c:687 usb_start_wait_urb+0x257/0x4d0 drivers/usb/core/message.c:63 usb_internal_control_msg drivers/usb/core/message.c:101 [inline] usb_control_msg+0x321/0x4a0 drivers/usb/core/message.c:152 hub_port_init+0x81d/0x2d30 drivers/usb/core/hub.c:4655 hub_port_connect drivers/usb/core/hub.c:5021 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0x11b8/0x3b00 drivers/usb/core/hub.c:5432 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 INFO: task kworker/1:5:5944 blocked for more than 144 seconds. Not tainted 5.1.0-rc4-319354-g9a33b36 #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:5 D24576 5944 2 0x80000000 Workqueue: usb_hub_wq hub_event Call Trace: schedule+0x8f/0x180 kernel/sched/core.c:3562 usb_kill_urb drivers/usb/core/urb.c:695 [inline] usb_kill_urb+0x22a/0x2c0 drivers/usb/core/urb.c:687 usb_start_wait_urb+0x257/0x4d0 drivers/usb/core/message.c:63 usb_internal_control_msg drivers/usb/core/message.c:101 [inline] usb_control_msg+0x321/0x4a0 drivers/usb/core/message.c:152 usb_get_string+0xb1/0x1a0 drivers/usb/core/message.c:693 usb_string_sub+0xff/0x3d0 drivers/usb/core/message.c:732 usb_get_langid drivers/usb/core/message.c:769 [inline] usb_string+0x1ca/0x510 drivers/usb/core/message.c:830 usb_cache_string+0x83/0x110 drivers/usb/core/message.c:876 usb_set_configuration+0x136f/0x1740 drivers/usb/core/message.c:1993 generic_probe+0xa2/0xda drivers/usb/core/generic.c:210 usb_probe_device+0xc0/0x150 drivers/usb/core/driver.c:266 really_probe+0x2da/0xb10 drivers/base/dd.c:509 driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 __device_attach+0x223/0x3a0 drivers/base/dd.c:844 bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 device_add+0xad2/0x16e0 drivers/base/core.c:2106 usb_new_device.cold+0x537/0xccf drivers/usb/core/hub.c:2534 hub_port_connect drivers/usb/core/hub.c:5089 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0x138e/0x3b00 drivers/usb/core/hub.c:5432 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: 6 locks held by kworker/0:0/5: #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x81f/0x1580 kernel/workqueue.c:2240 #1: 00000000f5131167 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x853/0x1580 kernel/workqueue.c:2244 #2: 00000000706160aa (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 00000000706160aa (&dev->mutex){....}, at: hub_event+0x18a/0x3b00 drivers/usb/core/hub.c:5378 #3: 00000000dc2c47e9 (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #3: 00000000dc2c47e9 (&dev->mutex){....}, at: __device_attach+0x80/0x3a0 drivers/base/dd.c:821 #4: 000000000631fdd8 (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #4: 000000000631fdd8 (&dev->mutex){....}, at: __device_attach+0x80/0x3a0 drivers/base/dd.c:821 #5: 0000000040245e45 (&dev->phy_mutex){+.+.}, at: asix_mdio_read+0x9d/0x2d0 drivers/net/usb/asix_common.c:465 5 locks held by kworker/1:0/17: #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x81f/0x1580 kernel/workqueue.c:2240 #1: 00000000554b37a3 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x853/0x1580 kernel/workqueue.c:2244 #2: 00000000215eda3e (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 00000000215eda3e (&dev->mutex){....}, at: hub_event+0x18a/0x3b00 drivers/usb/core/hub.c:5378 #3: 00000000ba132e50 (&port_dev->status_lock){+.+.}, at: usb_lock_port drivers/usb/core/hub.c:2994 [inline] #3: 00000000ba132e50 (&port_dev->status_lock){+.+.}, at: hub_port_connect drivers/usb/core/hub.c:5020 [inline] #3: 00000000ba132e50 (&port_dev->status_lock){+.+.}, at: hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] #3: 00000000ba132e50 (&port_dev->status_lock){+.+.}, at: port_event drivers/usb/core/hub.c:5350 [inline] #3: 00000000ba132e50 (&port_dev->status_lock){+.+.}, at: hub_event+0x11a3/0x3b00 drivers/usb/core/hub.c:5432 #4: 0000000073e7439a (hcd->address0_mutex){+.+.}, at: hub_port_init+0x1bb/0x2d30 drivers/usb/core/hub.c:4529 5 locks held by kworker/1:1/21: #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x81f/0x1580 kernel/workqueue.c:2240 #1: 00000000c71b2455 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x853/0x1580 kernel/workqueue.c:2244 #2: 000000004fa993aa (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 000000004fa993aa (&dev->mutex){....}, at: hub_event+0x18a/0x3b00 drivers/usb/core/hub.c:5378 #3: 00000000a88e2e90 (&port_dev->status_lock){+.+.}, at: usb_lock_port drivers/usb/core/hub.c:2994 [inline] #3: 00000000a88e2e90 (&port_dev->status_lock){+.+.}, at: hub_port_connect drivers/usb/core/hub.c:5020 [inline] #3: 00000000a88e2e90 (&port_dev->status_lock){+.+.}, at: hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] #3: 00000000a88e2e90 (&port_dev->status_lock){+.+.}, at: port_event drivers/usb/core/hub.c:5350 [inline] #3: 00000000a88e2e90 (&port_dev->status_lock){+.+.}, at: hub_event+0x11a3/0x3b00 drivers/usb/core/hub.c:5432 #4: 00000000a12d75d4 (hcd->address0_mutex){+.+.}, at: hub_port_init+0x1bb/0x2d30 drivers/usb/core/hub.c:4529 1 lock held by khungtaskd/23: #0: 0000000059590582 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x269 kernel/locking/lockdep.c:5059 5 locks held by kworker/1:2/531: #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x81f/0x1580 kernel/workqueue.c:2240 #1: 00000000f4dde28d ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x853/0x1580 kernel/workqueue.c:2244 #2: 00000000d092f187 (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 00000000d092f187 (&dev->mutex){....}, at: hub_event+0x18a/0x3b00 drivers/usb/core/hub.c:5378 #3: 00000000c96f35c5 (&port_dev->status_lock){+.+.}, at: usb_lock_port drivers/usb/core/hub.c:2994 [inline] #3: 00000000c96f35c5 (&port_dev->status_lock){+.+.}, at: hub_port_connect drivers/usb/core/hub.c:5020 [inline] #3: 00000000c96f35c5 (&port_dev->status_lock){+.+.}, at: hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] #3: 00000000c96f35c5 (&port_dev->status_lock){+.+.}, at: port_event drivers/usb/core/hub.c:5350 [inline] #3: 00000000c96f35c5 (&port_dev->status_lock){+.+.}, at: hub_event+0x11a3/0x3b00 drivers/usb/core/hub.c:5432 #4: 000000001d202d72 (hcd->address0_mutex){+.+.}, at: hub_port_init+0x1bb/0x2d30 drivers/usb/core/hub.c:4529 5 locks held by kworker/0:3/587: #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x81f/0x1580 kernel/workqueue.c:2240 #1: 00000000cf654b05 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x853/0x1580 kernel/workqueue.c:2244 #2: 000000009a91f33d (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 000000009a91f33d (&dev->mutex){....}, at: hub_event+0x18a/0x3b00 drivers/usb/core/hub.c:5378 #3: 00000000fd4e6efb (&port_dev->status_lock){+.+.}, at: usb_lock_port drivers/usb/core/hub.c:2994 [inline] #3: 00000000fd4e6efb (&port_dev->status_lock){+.+.}, at: hub_port_connect drivers/usb/core/hub.c:5020 [inline] #3: 00000000fd4e6efb (&port_dev->status_lock){+.+.}, at: hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] #3: 00000000fd4e6efb (&port_dev->status_lock){+.+.}, at: port_event drivers/usb/core/hub.c:5350 [inline] #3: 00000000fd4e6efb (&port_dev->status_lock){+.+.}, at: hub_event+0x11a3/0x3b00 drivers/usb/core/hub.c:5432 #4: 00000000296755aa (hcd->address0_mutex){+.+.}, at: hub_port_init+0x1bb/0x2d30 drivers/usb/core/hub.c:4529 1 lock held by rsyslogd/5258: 2 locks held by getty/5348: #0: 00000000e0fc1f80 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x27/0x80 drivers/tty/tty_ldisc.c:272 #1: 0000000089623e2e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21c/0x1a60 drivers/tty/n_tty.c:2156 2 locks held by getty/5349: #0: 00000000d7c051e4 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x27/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000c5a6e183 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21c/0x1a60 drivers/tty/n_tty.c:2156 2 locks held by getty/5350: #0: 0000000059e06e4f (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x27/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000003d989739 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21c/0x1a60 drivers/tty/n_tty.c:2156 2 locks held by getty/5351: #0: 0000000038eb357d (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x27/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000004576dba9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21c/0x1a60 drivers/tty/n_tty.c:2156 2 locks held by getty/5352: #0: 00000000ea743db9 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x27/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000005ef64f75 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21c/0x1a60 drivers/tty/n_tty.c:2156 2 locks held by getty/5353: #0: 000000001ace0423 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x27/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000ea35182d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21c/0x1a60 drivers/tty/n_tty.c:2156 2 locks held by getty/5354: #0: 000000004ea74117 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x27/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000a60c2d24 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21c/0x1a60 drivers/tty/n_tty.c:2156 4 locks held by kworker/1:5/5944: #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:619 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: 0000000031cbe8a4 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x81f/0x1580 kernel/workqueue.c:2240 #1: 000000007702f173 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x853/0x1580 kernel/workqueue.c:2244 #2: 00000000ec4eee7a (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #2: 00000000ec4eee7a (&dev->mutex){....}, at: hub_event+0x18a/0x3b00 drivers/usb/core/hub.c:5378 #3: 00000000c671fa2b (&dev->mutex){....}, at: device_lock include/linux/device.h:1207 [inline] #3: 00000000c671fa2b (&dev->mutex){....}, at: __device_attach+0x80/0x3a0 drivers/base/dd.c:821 ============================================= 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: 5375 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: 0033:0x722234 Code: 24 08 0f 57 c0 0f 11 44 24 10 e9 e7 8a fe ff cc cc cc cc cc cc cc 48 8b 44 24 08 84 00 48 89 44 24 08 0f 57 c0 0f 11 44 24 10 c7 8a fe ff cc cc cc cc cc cc cc 48 8b 44 24 08 84 00 48 89 44 RSP: 002b:000000c4256befe8 EFLAGS: 00000202 RAX: 000000c424143460 RBX: 000000c424143460 RCX: 0000000000722220 RDX: 000000c424143460 RSI: 0000000000000020 RDI: 000000c4256b34c0 RBP: 000000c4256bf0e8 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000099c8a6 R11: 0000000000000004 R12: 0000000000000000 R13: 0000000000000020 R14: 0000000000000013 R15: 0000000000000100 FS: 000000c42003f490 GS: 0000000000000000