syzbot has found a reproducer for the following issue on: HEAD commit: 90557fa89d3e dt-bindings: usb: atmel: Add Microchip LAN966.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=16892484080000 kernel config: https://syzkaller.appspot.com/x/.config?x=33f1eaa5b20a699 dashboard link: https://syzkaller.appspot.com/bug?extid=deb6abc36aad4008f407 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=155cc25c080000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11f64834080000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+deb6abc36aad4008f407@xxxxxxxxxxxxxxxxxxxxxxxxx INFO: task kworker/0:2:71 blocked for more than 143 seconds. Not tainted 5.19.0-rc4-syzkaller-00099-g90557fa89d3e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:2 state:D stack:23752 pid: 71 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: <TASK> context_switch kernel/sched/core.c:5146 [inline] __schedule+0x93f/0x2630 kernel/sched/core.c:6458 schedule+0xd2/0x1f0 kernel/sched/core.c:6530 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6589 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa70/0x1350 kernel/locking/mutex.c:747 input_disconnect_device drivers/input/input.c:784 [inline] __input_unregister_device+0x24/0x470 drivers/input/input.c:2234 input_unregister_device+0xb4/0xf0 drivers/input/input.c:2429 iforce_usb_disconnect+0x5e/0xf0 drivers/input/joystick/iforce/iforce-usb.c:261 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:545 [inline] device_remove+0x11f/0x170 drivers/base/dd.c:537 __device_release_driver drivers/base/dd.c:1222 [inline] device_release_driver_internal+0x4a1/0x700 drivers/base/dd.c:1248 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529 device_del+0x4f3/0xc80 drivers/base/core.c:3604 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x278/0x6ec drivers/usb/core/hub.c:2228 hub_port_connect drivers/usb/core/hub.c:5190 [inline] hub_port_connect_change drivers/usb/core/hub.c:5490 [inline] port_event drivers/usb/core/hub.c:5646 [inline] hub_event+0x1e83/0x4690 drivers/usb/core/hub.c:5728 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 process_scheduled_works kernel/workqueue.c:2352 [inline] worker_thread+0x854/0x1080 kernel/workqueue.c:2438 kthread+0x2ef/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 </TASK> Showing all locks held in the system: 1 lock held by khungtaskd/26: #0: ffffffff87a94700 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491 6 locks held by kworker/0:2/71: #0: ffff888109b13538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888109b13538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888109b13538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888109b13538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888109b13538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888109b13538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc90001057da8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffff88810f267190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #2: ffff88810f267190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4690 drivers/usb/core/hub.c:5674 #3: ffff88811d2ca190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #3: ffff88811d2ca190 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x43/0x6ec drivers/usb/core/hub.c:2219 #4: ffff88811d2cb118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #4: ffff88811d2cb118 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1054 [inline] #4: ffff88811d2cb118 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa0/0x700 drivers/base/dd.c:1245 #5: ffff88811d2cc2c0 (&dev->mutex#2){+.+.}-{3:3}, at: input_disconnect_device drivers/input/input.c:784 [inline] #5: ffff88811d2cc2c0 (&dev->mutex#2){+.+.}-{3:3}, at: __input_unregister_device+0x24/0x470 drivers/input/input.c:2234 2 locks held by acpid/1166: #0: ffff88811d2cf110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_close_device drivers/input/evdev.c:411 [inline] #0: ffff88811d2cf110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_release+0x299/0x410 drivers/input/evdev.c:456 #1: ffff88811d2cc2c0 (&dev->mutex#2){+.+.}-{3:3}, at: input_close_device+0x42/0x1f0 drivers/input/input.c:726 2 locks held by getty/1240: #0: ffff8881109fc098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc900000432e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2124 3 locks held by udevd/1293: #0: ffff8881106e6488 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:197 [inline] #0: ffff8881106e6488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x6e0 fs/kernfs/file.c:236 #1: ffff888108bf0a00 (kn->active#40){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:198 [inline] #1: ffff888108bf0a00 (kn->active#40){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x6e0 fs/kernfs/file.c:236 #2: ffff88811d2ca190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:840 [inline] #2: ffff88811d2ca190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.19.0-rc4-syzkaller-00099-g90557fa89d3e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:369 kthread+0x2ef/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 </TASK> Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline] NMI backtrace for cpu 1 skipped: idling at acpi_idle_do_entry+0x1c9/0x240 drivers/acpi/processor_idle.c:554
