INFO: task kworker/0:0:5 blocked for more than 143 seconds. Not tainted 5.6.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:0 D24040 5 2 0x80084000 Workqueue: usb_hub_wq hub_event Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4154 schedule_timeout+0x6b5/0xe80 kernel/time/timer.c:1871 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x25f/0x3c0 kernel/sched/completion.c:136 pn533_send_cmd_sync+0xac/0x100 drivers/nfc/pn533/pn533.c:639 pn533_get_firmware_version drivers/nfc/pn533/pn533.c:2570 [inline] pn533_finalize_setup+0xc7/0x580 drivers/nfc/pn533/pn533.c:2769 pn533_usb_probe+0xa26/0xf72 drivers/nfc/pn533/usb.c:548 usb_probe_interface+0x277/0x840 drivers/usb/core/driver.c:361 really_probe+0x20b/0xb00 drivers/base/dd.c:551 driver_probe_device+0x259/0x370 drivers/base/dd.c:724 bus_for_each_drv+0x118/0x1b0 drivers/base/bus.c:431 __device_attach+0x1be/0x2e0 drivers/base/dd.c:897 bus_probe_device+0x19e/0x250 drivers/base/bus.c:491 device_add+0x10f7/0x1920 drivers/base/core.c:2500 usb_set_configuration+0xc81/0x1940 drivers/usb/core/message.c:2023 generic_probe+0x61/0x8a drivers/usb/core/generic.c:210 really_probe+0x20b/0xb00 drivers/base/dd.c:551 driver_probe_device+0x259/0x370 drivers/base/dd.c:724 bus_for_each_drv+0x118/0x1b0 drivers/base/bus.c:431 __device_attach+0x1be/0x2e0 drivers/base/dd.c:897 bus_probe_device+0x19e/0x250 drivers/base/bus.c:491 device_add+0x10f7/0x1920 drivers/base/core.c:2500 usb_new_device+0x866/0x14e0 drivers/usb/core/hub.c:2548 hub_port_connect drivers/usb/core/hub.c:5195 [inline] hub_port_connect_change drivers/usb/core/hub.c:5335 [inline] port_event drivers/usb/core/hub.c:5481 [inline] hub_event+0x1079/0x3240 drivers/usb/core/hub.c:5563 process_one_work+0x8ff/0x1690 kernel/workqueue.c:2264 worker_thread+0x82/0xb50 kernel/workqueue.c:2410 kthread+0x31d/0x3e0 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 INFO: task kworker/1:5:3500 blocked for more than 144 seconds. Not tainted 5.6.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:5 D26368 3500 2 0x80084000 Workqueue: usb_hub_wq hub_event Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4154 schedule_timeout+0x6b5/0xe80 kernel/time/timer.c:1871 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x25f/0x3c0 kernel/sched/completion.c:136 pn533_send_cmd_sync+0xac/0x100 drivers/nfc/pn533/pn533.c:639 pn533_get_firmware_version drivers/nfc/pn533/pn533.c:2570 [inline] pn533_finalize_setup+0xc7/0x580 drivers/nfc/pn533/pn533.c:2769 pn533_usb_probe+0xa26/0xf72 drivers/nfc/pn533/usb.c:548 usb_probe_interface+0x277/0x840 drivers/usb/core/driver.c:361 really_probe+0x20b/0xb00 drivers/base/dd.c:551 driver_probe_device+0x259/0x370 drivers/base/dd.c:724 bus_for_each_drv+0x118/0x1b0 drivers/base/bus.c:431 __device_attach+0x1be/0x2e0 drivers/base/dd.c:897 bus_probe_device+0x19e/0x250 drivers/base/bus.c:491 device_add+0x10f7/0x1920 drivers/base/core.c:2500 usb_set_configuration+0xc81/0x1940 drivers/usb/core/message.c:2023 generic_probe+0x61/0x8a drivers/usb/core/generic.c:210 really_probe+0x20b/0xb00 drivers/base/dd.c:551 driver_probe_device+0x259/0x370 drivers/base/dd.c:724 bus_for_each_drv+0x118/0x1b0 drivers/base/bus.c:431 __device_attach+0x1be/0x2e0 drivers/base/dd.c:897 bus_probe_device+0x19e/0x250 drivers/base/bus.c:491 device_add+0x10f7/0x1920 drivers/base/core.c:2500 usb_new_device+0x866/0x14e0 drivers/usb/core/hub.c:2548 hub_port_connect drivers/usb/core/hub.c:5195 [inline] hub_port_connect_change drivers/usb/core/hub.c:5335 [inline] port_event drivers/usb/core/hub.c:5481 [inline] hub_event+0x1079/0x3240 drivers/usb/core/hub.c:5563 process_one_work+0x8ff/0x1690 kernel/workqueue.c:2264 worker_thread+0x82/0xb50 kernel/workqueue.c:2410 kthread+0x31d/0x3e0 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 INFO: task kworker/1:8:3503 blocked for more than 145 seconds. Not tainted 5.6.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:8 D25624 3503 2 0x80084000 Workqueue: usb_hub_wq hub_event Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4154 schedule_timeout+0x6b5/0xe80 kernel/time/timer.c:1871 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x25f/0x3c0 kernel/sched/completion.c:136 pn533_send_cmd_sync+0xac/0x100 drivers/nfc/pn533/pn533.c:639 pn533_get_firmware_version drivers/nfc/pn533/pn533.c:2570 [inline] pn533_finalize_setup+0xc7/0x580 drivers/nfc/pn533/pn533.c:2769 pn533_usb_probe+0xa26/0xf72 drivers/nfc/pn533/usb.c:548 usb_probe_interface+0x277/0x840 drivers/usb/core/driver.c:361 really_probe+0x20b/0xb00 drivers/base/dd.c:551 driver_probe_device+0x259/0x370 drivers/base/dd.c:724 bus_for_each_drv+0x118/0x1b0 drivers/base/bus.c:431 __device_attach+0x1be/0x2e0 drivers/base/dd.c:897 bus_probe_device+0x19e/0x250 drivers/base/bus.c:491 device_add+0x10f7/0x1920 drivers/base/core.c:2500 usb_set_configuration+0xc81/0x1940 drivers/usb/core/message.c:2023 generic_probe+0x61/0x8a drivers/usb/core/generic.c:210 really_probe+0x20b/0xb00 drivers/base/dd.c:551 driver_probe_device+0x259/0x370 drivers/base/dd.c:724 bus_for_each_drv+0x118/0x1b0 drivers/base/bus.c:431 __device_attach+0x1be/0x2e0 drivers/base/dd.c:897 bus_probe_device+0x19e/0x250 drivers/base/bus.c:491 device_add+0x10f7/0x1920 drivers/base/core.c:2500 usb_new_device+0x866/0x14e0 drivers/usb/core/hub.c:2548 hub_port_connect drivers/usb/core/hub.c:5195 [inline] hub_port_connect_change drivers/usb/core/hub.c:5335 [inline] port_event drivers/usb/core/hub.c:5481 [inline] hub_event+0x1079/0x3240 drivers/usb/core/hub.c:5563 process_one_work+0x8ff/0x1690 kernel/workqueue.c:2264 worker_thread+0x82/0xb50 kernel/workqueue.c:2410 kthread+0x31d/0x3e0 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 INFO: task kworker/1:9:3504 blocked for more than 146 seconds. Not tainted 5.6.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:9 D26216 3504 2 0x80084000 Workqueue: usb_hub_wq hub_event Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4154 schedule_timeout+0x6b5/0xe80 kernel/time/timer.c:1871 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x25f/0x3c0 kernel/sched/completion.c:136 pn533_send_cmd_sync+0xac/0x100 drivers/nfc/pn533/pn533.c:639 pn533_get_firmware_version drivers/nfc/pn533/pn533.c:2570 [inline] pn533_finalize_setup+0xc7/0x580 drivers/nfc/pn533/pn533.c:2769 pn533_usb_probe+0xa26/0xf72 drivers/nfc/pn533/usb.c:548 usb_probe_interface+0x277/0x840 drivers/usb/core/driver.c:361 really_probe+0x20b/0xb00 drivers/base/dd.c:551 driver_probe_device+0x259/0x370 drivers/base/dd.c:724 bus_for_each_drv+0x118/0x1b0 drivers/base/bus.c:431 __device_attach+0x1be/0x2e0 drivers/base/dd.c:897 bus_probe_device+0x19e/0x250 drivers/base/bus.c:491 device_add+0x10f7/0x1920 drivers/base/core.c:2500 usb_set_configuration+0xc81/0x1940 drivers/usb/core/message.c:2023 generic_probe+0x61/0x8a drivers/usb/core/generic.c:210 really_probe+0x20b/0xb00 drivers/base/dd.c:551 driver_probe_device+0x259/0x370 drivers/base/dd.c:724 bus_for_each_drv+0x118/0x1b0 drivers/base/bus.c:431 __device_attach+0x1be/0x2e0 drivers/base/dd.c:897 bus_probe_device+0x19e/0x250 drivers/base/bus.c:491 device_add+0x10f7/0x1920 drivers/base/core.c:2500 usb_new_device+0x866/0x14e0 drivers/usb/core/hub.c:2548 hub_port_connect drivers/usb/core/hub.c:5195 [inline] hub_port_connect_change drivers/usb/core/hub.c:5335 [inline] port_event drivers/usb/core/hub.c:5481 [inline] hub_event+0x1079/0x3240 drivers/usb/core/hub.c:5563 process_one_work+0x8ff/0x1690 kernel/workqueue.c:2264 worker_thread+0x82/0xb50 kernel/workqueue.c:2410 kthread+0x31d/0x3e0 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 INFO: task kworker/0:3:9201 blocked for more than 147 seconds. Not tainted 5.6.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:3 D26624 9201 2 0x80084000 Workqueue: usb_hub_wq hub_event Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4154 schedule_timeout+0x6b5/0xe80 kernel/time/timer.c:1871 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x25f/0x3c0 kernel/sched/completion.c:136 pn533_send_cmd_sync+0xac/0x100 drivers/nfc/pn533/pn533.c:639 pn533_get_firmware_version drivers/nfc/pn533/pn533.c:2570 [inline] pn533_finalize_setup+0xc7/0x580 drivers/nfc/pn533/pn533.c:2769 pn533_usb_probe+0xa26/0xf72 drivers/nfc/pn533/usb.c:548 usb_probe_interface+0x277/0x840 drivers/usb/core/driver.c:361 really_probe+0x20b/0xb00 drivers/base/dd.c:551 driver_probe_device+0x259/0x370 drivers/base/dd.c:724 bus_for_each_drv+0x118/0x1b0 drivers/base/bus.c:431 __device_attach+0x1be/0x2e0 drivers/base/dd.c:897 bus_probe_device+0x19e/0x250 drivers/base/bus.c:491 device_add+0x10f7/0x1920 drivers/base/core.c:2500 usb_set_configuration+0xc81/0x1940 drivers/usb/core/message.c:2023 generic_probe+0x61/0x8a drivers/usb/core/generic.c:210 really_probe+0x20b/0xb00 drivers/base/dd.c:551 driver_probe_device+0x259/0x370 drivers/base/dd.c:724 bus_for_each_drv+0x118/0x1b0 drivers/base/bus.c:431 __device_attach+0x1be/0x2e0 drivers/base/dd.c:897 bus_probe_device+0x19e/0x250 drivers/base/bus.c:491 device_add+0x10f7/0x1920 drivers/base/core.c:2500 usb_new_device+0x866/0x14e0 drivers/usb/core/hub.c:2548 hub_port_connect drivers/usb/core/hub.c:5195 [inline] hub_port_connect_change drivers/usb/core/hub.c:5335 [inline] port_event drivers/usb/core/hub.c:5481 [inline] hub_event+0x1079/0x3240 drivers/usb/core/hub.c:5563 process_one_work+0x8ff/0x1690 kernel/workqueue.c:2264 worker_thread+0x82/0xb50 kernel/workqueue.c:2410 kthread+0x31d/0x3e0 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 INFO: task kworker/0:4:10672 blocked for more than 148 seconds. Not tainted 5.6.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:4 D26632 10672 2 0x80084000 Workqueue: usb_hub_wq hub_event Call Trace: schedule+0xc4/0x2b0 kernel/sched/core.c:4154 schedule_timeout+0x6b5/0xe80 kernel/time/timer.c:1871 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x25f/0x3c0 kernel/sched/completion.c:136 pn533_send_cmd_sync+0xac/0x100 drivers/nfc/pn533/pn533.c:639 pn533_get_firmware_version drivers/nfc/pn533/pn533.c:2570 [inline] pn533_finalize_setup+0xc7/0x580 drivers/nfc/pn533/pn533.c:2769 pn533_usb_probe+0xa26/0xf72 drivers/nfc/pn533/usb.c:548 usb_probe_interface+0x277/0x840 drivers/usb/core/driver.c:361 really_probe+0x20b/0xb00 drivers/base/dd.c:551 driver_probe_device+0x259/0x370 drivers/base/dd.c:724 bus_for_each_drv+0x118/0x1b0 drivers/base/bus.c:431 __device_attach+0x1be/0x2e0 drivers/base/dd.c:897 bus_probe_device+0x19e/0x250 drivers/base/bus.c:491 device_add+0x10f7/0x1920 drivers/base/core.c:2500 usb_set_configuration+0xc81/0x1940 drivers/usb/core/message.c:2023 generic_probe+0x61/0x8a drivers/usb/core/generic.c:210 really_probe+0x20b/0xb00 drivers/base/dd.c:551 driver_probe_device+0x259/0x370 drivers/base/dd.c:724 bus_for_each_drv+0x118/0x1b0 drivers/base/bus.c:431 __device_attach+0x1be/0x2e0 drivers/base/dd.c:897 bus_probe_device+0x19e/0x250 drivers/base/bus.c:491 device_add+0x10f7/0x1920 drivers/base/core.c:2500 usb_new_device+0x866/0x14e0 drivers/usb/core/hub.c:2548 hub_port_connect drivers/usb/core/hub.c:5195 [inline] hub_port_connect_change drivers/usb/core/hub.c:5335 [inline] port_event drivers/usb/core/hub.c:5481 [inline] hub_event+0x1079/0x3240 drivers/usb/core/hub.c:5563 process_one_work+0x8ff/0x1690 kernel/workqueue.c:2264 worker_thread+0x82/0xb50 kernel/workqueue.c:2410 kthread+0x31d/0x3e0 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Showing all locks held in the system: 5 locks held by kworker/0:0/5: #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x80b/0x1690 kernel/workqueue.c:2235 #1: ffffc90000ca7e00 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x840/0x1690 kernel/workqueue.c:2239 #2: ffff8882363c2200 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #2: ffff8882363c2200 (&dev->mutex){....}, at: hub_event+0x143/0x3240 drivers/usb/core/hub.c:5509 #3: ffff88809f829200 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #3: ffff88809f829200 (&dev->mutex){....}, at: __device_attach+0x76/0x2e0 drivers/base/dd.c:874 #4: ffff8880ad07e190 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #4: ffff8880ad07e190 (&dev->mutex){....}, at: __device_attach+0x76/0x2e0 drivers/base/dd.c:874 1 lock held by khungtaskd/1557: #0: ffffffff8a2e5c40 (rcu_read_lock){....}, at: debug_show_all_locks+0x52/0x2b9 kernel/locking/lockdep.c:5331 5 locks held by kworker/1:5/3500: #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x80b/0x1690 kernel/workqueue.c:2235 #1: ffffc90003467e00 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x840/0x1690 kernel/workqueue.c:2239 #2: ffff888235c16200 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #2: ffff888235c16200 (&dev->mutex){....}, at: hub_event+0x143/0x3240 drivers/usb/core/hub.c:5509 #3: ffff8880aa714200 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #3: ffff8880aa714200 (&dev->mutex){....}, at: __device_attach+0x76/0x2e0 drivers/base/dd.c:874 #4: ffff8880988ff190 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #4: ffff8880988ff190 (&dev->mutex){....}, at: __device_attach+0x76/0x2e0 drivers/base/dd.c:874 5 locks held by kworker/1:8/3503: #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x80b/0x1690 kernel/workqueue.c:2235 #1: ffffc90003497e00 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x840/0x1690 kernel/workqueue.c:2239 #2: ffff8880a93a3200 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #2: ffff8880a93a3200 (&dev->mutex){....}, at: hub_event+0x143/0x3240 drivers/usb/core/hub.c:5509 #3: ffff8880a1357200 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #3: ffff8880a1357200 (&dev->mutex){....}, at: __device_attach+0x76/0x2e0 drivers/base/dd.c:874 #4: ffff8880a0be8190 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #4: ffff8880a0be8190 (&dev->mutex){....}, at: __device_attach+0x76/0x2e0 drivers/base/dd.c:874 5 locks held by kworker/1:9/3504: #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x80b/0x1690 kernel/workqueue.c:2235 #1: ffffc900034a7e00 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x840/0x1690 kernel/workqueue.c:2239 #2: ffff8882363d9200 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #2: ffff8882363d9200 (&dev->mutex){....}, at: hub_event+0x143/0x3240 drivers/usb/core/hub.c:5509 #3: ffff8880aa7a3200 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #3: ffff8880aa7a3200 (&dev->mutex){....}, at: __device_attach+0x76/0x2e0 drivers/base/dd.c:874 #4: ffff8880934ff190 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #4: ffff8880934ff190 (&dev->mutex){....}, at: __device_attach+0x76/0x2e0 drivers/base/dd.c:874 1 lock held by in:imklog/8577: 2 locks held by kworker/u4:7/8723: #0: ffff8880b9f52218 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1215 [inline] #0: ffff8880b9f52218 (&rq->lock){-.-.}, at: __schedule+0x2b5/0x1f90 kernel/sched/core.c:4028 #1: ffffffff8a2e5c40 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:435 [inline] #1: ffffffff8a2e5c40 (rcu_read_lock){....}, at: update_curr+0x2ec/0x860 kernel/sched/fair.c:859 5 locks held by kworker/0:3/9201: #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x80b/0x1690 kernel/workqueue.c:2235 #1: ffffc900021bfe00 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x840/0x1690 kernel/workqueue.c:2239 #2: ffff8882363f0200 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #2: ffff8882363f0200 (&dev->mutex){....}, at: hub_event+0x143/0x3240 drivers/usb/core/hub.c:5509 #3: ffff8880a0975200 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #3: ffff8880a0975200 (&dev->mutex){....}, at: __device_attach+0x76/0x2e0 drivers/base/dd.c:874 #4: ffff8880a7736190 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #4: ffff8880a7736190 (&dev->mutex){....}, at: __device_attach+0x76/0x2e0 drivers/base/dd.c:874 5 locks held by kworker/0:4/10672: #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8880b0f36d28 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x80b/0x1690 kernel/workqueue.c:2235 #1: ffffc90009f4fe00 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x840/0x1690 kernel/workqueue.c:2239 #2: ffff8882363f7200 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #2: ffff8882363f7200 (&dev->mutex){....}, at: hub_event+0x143/0x3240 drivers/usb/core/hub.c:5509 #3: ffff8880b40c3200 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #3: ffff8880b40c3200 (&dev->mutex){....}, at: __device_attach+0x76/0x2e0 drivers/base/dd.c:874 #4: ffff8880a1e04190 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline] #4: ffff8880a1e04190 (&dev->mutex){....}, at: __device_attach+0x76/0x2e0 drivers/base/dd.c:874 4 locks held by syz-executor.3/20129: #0: ffff8880b9e52218 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1215 [inline] #0: ffff8880b9e52218 (&rq->lock){-.-.}, at: __schedule+0x2b5/0x1f90 kernel/sched/core.c:4028 #1: ffffffff8a2e5c40 (rcu_read_lock){....}, at: cpu_of kernel/sched/sched.h:1023 [inline] #1: ffffffff8a2e5c40 (rcu_read_lock){....}, at: __update_idle_core+0x3c/0x550 kernel/sched/fair.c:5747 #2: ffff8880aa05a2b8 (&sig->wait_chldexit){....}, at: __wake_up_common_lock+0xa8/0x120 kernel/sched/wait.c:122 #3: ffffffff8a2e5c40 (rcu_read_lock){....}, at: rcu_read_lock include/linux/rcupdate.h:602 [inline] #3: ffffffff8a2e5c40 (rcu_read_lock){....}, at: send_signal+0xf5/0x5f0 kernel/signal.c:1224 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1557 Comm: khungtaskd Not tainted 5.6.0-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+0x96/0xe0 lib/dump_stack.c:118 nmi_cpu_backtrace.cold.6+0x2e/0x33 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x183/0x1ac 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+0x69d/0xd50 kernel/hung_task.c:289 kthread+0x31d/0x3e0 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 20166 Comm: syz-executor.0 Not tainted 5.6.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:tomoyo_domain_quota_is_ok+0x214/0x435 security/tomoyo/util.c:1071 Code: 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 83 c4 08 b8 01 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f c3 31 d2 31 c9 89 d0 d3 f8 <83> e0 01 83 f8 01 83 db ff 83 c1 01 83 f9 10 75 eb e9 83 fe ff ff RSP: 0018:ffffc9000ed578e0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 000000000000000b RCX: 000000000000000f RDX: 0000000000000001 RSI: 1ffffffff1cc2ca5 RDI: ffff8880abe73d99 RBP: ffff8880abe73d80 R08: fffffbfff1cc2cad R09: fffffbfff1cc2cad R10: fffffbfff1cc2cac R11: ffffffff8e616567 R12: dffffc0000000000 R13: ffffc9000ed57c28 R14: ffff8880aa5b5c00 R15: ffff8880aa5b5c10 FS: 0000000002fe2400(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004e4da0 CR3: 000000009f5b4000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tomoyo_supervisor+0x304/0xcd0 security/tomoyo/common.c:2089 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission security/tomoyo/file.c:587 [inline] tomoyo_path_permission+0x29d/0x440 security/tomoyo/file.c:573 tomoyo_path_perm+0x34a/0x3c0 security/tomoyo/file.c:838 tomoyo_path_symlink+0x82/0xd0 security/tomoyo/tomoyo.c:206 security_path_symlink+0xbb/0x110 security/security.c:1085 do_symlinkat+0xda/0x1b0 fs/namei.c:4226 do_syscall_64+0x98/0x560 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465ee7 Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 58 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffdad781c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000058 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000465ee7 RDX: 00007ffdad781d07 RSI: 00000000004bfd5a RDI: 00007ffdad781cf0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffdad781ab0 R10: 00007ffdad781967 R11: 0000000000000206 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffdad781cf0