INFO: task kworker/1:2:4572 blocked for more than 143 seconds. Not tainted 5.13.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:2 state:D stack:24328 pid: 4572 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x8e3/0x23a0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5285 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0x7d4/0x10c0 kernel/locking/mutex.c:1104 input_disconnect_device drivers/input/input.c:737 [inline] __input_unregister_device+0x1e/0x420 drivers/input/input.c:2184 input_unregister_device+0x7f/0xb0 drivers/input/input.c:2379 iforce_usb_disconnect+0x59/0xe0 drivers/input/joystick/iforce/iforce-usb.c:261 usb_unbind_interface+0x183/0x7e0 drivers/usb/core/driver.c:458 __device_release_driver+0x32f/0x660 drivers/base/dd.c:1181 device_release_driver_internal drivers/base/dd.c:1212 [inline] device_release_driver+0x21/0x30 drivers/base/dd.c:1235 bus_remove_device+0x298/0x550 drivers/base/bus.c:533 device_del+0x494/0xc10 drivers/base/core.c:3512 usb_disable_device+0x29c/0x660 drivers/usb/core/message.c:1413 usb_disconnect.cold+0x20c/0x681 drivers/usb/core/hub.c:2221 hub_port_connect drivers/usb/core/hub.c:5129 [inline] hub_port_connect_change drivers/usb/core/hub.c:5418 [inline] port_event drivers/usb/core/hub.c:5564 [inline] hub_event+0xb22/0x36d0 drivers/usb/core/hub.c:5646 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2276 process_scheduled_works kernel/workqueue.c:2338 [inline] worker_thread+0x733/0xf80 kernel/workqueue.c:2424 kthread+0x36f/0x450 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Showing all locks held in the system: 1 lock held by khungtaskd/1634: #0: ffffffff8a970340 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6335 6 locks held by kworker/1:2/4572: #0: ffff8881415ac138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881415ac138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8881415ac138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8881415ac138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline] #0: ffff8881415ac138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ffff8881415ac138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x771/0x13b0 kernel/workqueue.c:2247 #1: ffffc9000a6bfdb0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x79e/0x13b0 kernel/workqueue.c:2251 #2: ffff88801fe61220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:742 [inline] #2: ffff88801fe61220 (&dev->mutex){....}-{3:3}, at: hub_event+0x127/0x36d0 drivers/usb/core/hub.c:5592 #3: ffff888034712220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:742 [inline] #3: ffff888034712220 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x4d/0x681 drivers/usb/core/hub.c:2212 #4: ffff8880340311a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:742 [inline] #4: ffff8880340311a8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1001 [inline] #4: ffff8880340311a8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal drivers/base/dd.c:1209 [inline] #4: ffff8880340311a8 (&dev->mutex){....}-{3:3}, at: device_release_driver+0x17/0x30 drivers/base/dd.c:1235 #5: ffff88802c9122c0 (&dev->mutex#2){+.+.}-{3:3}, at: input_disconnect_device drivers/input/input.c:737 [inline] #5: ffff88802c9122c0 (&dev->mutex#2){+.+.}-{3:3}, at: __input_unregister_device+0x1e/0x420 drivers/input/input.c:2184 2 locks held by acpid/4797: #0: ffff88803475c158 (&joydev->mutex){+.+.}-{3:3}, at: joydev_close_device drivers/input/joydev.c:220 [inline] #0: ffff88803475c158 (&joydev->mutex){+.+.}-{3:3}, at: joydev_release+0x16b/0x250 drivers/input/joydev.c:252 #1: ffff88802c9122c0 (&dev->mutex#2){+.+.}-{3:3}, at: input_close_device+0x3b/0x190 drivers/input/input.c:679 2 locks held by getty/5129: #0: ffff888147733098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:267 #1: ffffc900016162e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xa65/0xf90 drivers/tty/n_tty.c:2179 3 locks held by kworker/0:5/5464: 2 locks held by udevd/5777: #0: ffff88802f4b5110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_open_device drivers/input/evdev.c:393 [inline] #0: ffff88802f4b5110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_open+0x2af/0x630 drivers/input/evdev.c:487 #1: ffff88802c9122c0 (&dev->mutex#2){+.+.}-{3:3}, at: input_open_device+0x45/0x290 drivers/input/input.c:609 2 locks held by syz-executor.0/6047: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1634 Comm: khungtaskd Not tainted 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa5/0xe6 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x30/0x99 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0x956/0xc30 kernel/hung_task.c:294 kthread+0x36f/0x450 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:108 [inline] NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry+0x161/0x1c0 drivers/acpi/processor_idle.c:513