INFO: task kworker/1:0:22 blocked for more than 143 seconds. Not tainted 6.4.0-rc3-syzkaller-geb0f1697d729 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:0 pid:22 ppid:2 flags:0x00000008 Workqueue: usb_hub_wq hub_event Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:556 context_switch kernel/sched/core.c:5343 [inline] __schedule+0x1368/0x23b8 kernel/sched/core.c:6669 schedule+0xc4/0x170 kernel/sched/core.c:6745 usb_kill_urb+0x1b4/0x32c drivers/usb/core/urb.c:728 usb_start_wait_urb+0x16c/0x414 drivers/usb/core/message.c:64 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0x228/0x3f8 drivers/usb/core/message.c:153 usb_get_descriptor+0xb4/0x3bc drivers/usb/core/message.c:793 usb_get_device_descriptor+0x9c/0xfc drivers/usb/core/message.c:1072 hub_port_init+0xe50/0x1f70 drivers/usb/core/hub.c:4969 hub_port_connect drivers/usb/core/hub.c:5336 [inline] hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] port_event drivers/usb/core/hub.c:5711 [inline] hub_event+0x22b4/0x474c drivers/usb/core/hub.c:5793 process_one_work+0x788/0x12d4 kernel/workqueue.c:2405 worker_thread+0x8e0/0xfe8 kernel/workqueue.c:2552 kthread+0x288/0x310 kernel/kthread.c:379 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:853 Showing all locks held in the system: 1 lock held by kthreadd/2: #0: ffff0001b4237b18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x44 kernel/sched/core.c:558 1 lock held by rcu_tasks_kthre/13: #0: ffff800016091050 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:518 1 lock held by rcu_tasks_trace/14: #0: ffff800016091410 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:518 5 locks held by kworker/1:0/22: #0: ffff0000c27fb538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x664/0x12d4 kernel/workqueue.c:2378 #1: ffff80001a8b7c20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x12d4 kernel/workqueue.c:2380 #2: ffff0000d0303190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:837 [inline] #2: ffff0000d0303190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c8/0x474c drivers/usb/core/hub.c:5739 #3: ffff0000d0306510 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3147 [inline] #3: ffff0000d0306510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5303 [inline] #3: ffff0000d0306510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] #3: ffff0000d0306510 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5711 [inline] #3: ffff0000d0306510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x1da0/0x474c drivers/usb/core/hub.c:5793 #4: ffff0000d0052068 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5304 [inline] #4: ffff0000d0052068 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] #4: ffff0000d0052068 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5711 [inline] #4: ffff0000d0052068 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x1dcc/0x474c drivers/usb/core/hub.c:5793 1 lock held by khungtaskd/29: #0: ffff800016090e80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:326 2 locks held by getty/5729: #0: ffff0000d48ec098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001ae002f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1210 drivers/tty/n_tty.c:2176 8 locks held by syz-executor105/23039: =============================================