usb 2-1: USB disconnect, device number 14 ------------[ cut here ]------------ lockdep bfs error:-1 WARNING: CPU: 1 PID: 19742 at kernel/locking/lockdep.c:1960 print_bfs_bug+0x130/0x1e0 kernel/locking/lockdep.c:1960 Modules linked in: CPU: 1 PID: 19742 Comm: kworker/1:13 Not tainted 5.9.0-rc7-next-20200930-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event RIP: 0010:print_bfs_bug+0x130/0x1e0 kernel/locking/lockdep.c:1960 Code: e2 08 00 74 2c 48 c7 c7 c0 7f a6 8d e8 49 51 01 00 66 90 85 db 75 05 5b 5d 41 5c c3 89 ee 48 c7 c7 20 e8 ab 88 e8 7b e5 c0 06 <0f> 0b 5b 5d 41 5c c3 0f 0b e8 62 82 e9 06 85 c0 74 d7 48 c7 c0 38 RSP: 0018:ffffc90015b2ed50 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815df1a5 RDI: fffff52002b65d9c RBP: 00000000ffffffff R08: 0000000000000001 R09: ffff8880ae520f8b R10: 0000000000000000 R11: 207065646b636f6c R12: ffff888059ef22c0 R13: dffffc0000000000 R14: 0000000000000008 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd38047be0 CR3: 0000000095c99000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_irq_usage+0x6b4/0xc60 kernel/locking/lockdep.c:2585 check_prev_add kernel/locking/lockdep.c:2823 [inline] check_prevs_add kernel/locking/lockdep.c:2944 [inline] validate_chain kernel/locking/lockdep.c:3562 [inline] __lock_acquire+0x2873/0x56d0 kernel/locking/lockdep.c:4796 lock_acquire+0x1f2/0xaa0 kernel/locking/lockdep.c:5398 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 alloc_object lib/debugobjects.c:239 [inline] __debug_object_init+0x5c6/0xd10 lib/debugobjects.c:548 __init_work+0x48/0x50 kernel/workqueue.c:503 call_usermodehelper_setup+0xb5/0x2f0 kernel/umh.c:358 kobject_uevent_env+0xe11/0x1400 lib/kobject_uevent.c:613 device_del+0x91f/0xec0 drivers/base/core.c:3118 device_unregister+0x11/0x30 drivers/base/core.c:3141 led_classdev_unregister.part.0+0xde/0x270 drivers/leds/led-class.c:459 led_classdev_unregister+0x58/0x70 include/linux/err.h:41 input_leds_disconnect+0xaa/0x160 drivers/input/input-leds.c:178 __input_unregister_device+0x206/0x470 drivers/input/input.c:2091 input_unregister_device+0xb4/0xf0 drivers/input/input.c:2273 hidinput_disconnect+0x15e/0x3d0 drivers/hid/hid-input.c:1982 hid_disconnect+0x13f/0x1a0 drivers/hid/hid-core.c:2019 hid_hw_stop drivers/hid/hid-core.c:2066 [inline] hid_device_remove+0x186/0x240 drivers/hid/hid-core.c:2309 __device_release_driver+0x3c6/0x6f0 drivers/base/dd.c:1152 device_release_driver_internal drivers/base/dd.c:1183 [inline] device_release_driver+0x26/0x40 drivers/base/dd.c:1206 bus_remove_device+0x2dc/0x4a0 drivers/base/bus.c:533 device_del+0x502/0xec0 drivers/base/core.c:3108 hid_remove_device drivers/hid/hid-core.c:2478 [inline] hid_destroy_device+0xe1/0x150 drivers/hid/hid-core.c:2497 usbhid_disconnect+0x9f/0xe0 drivers/hid/usbhid/hid-core.c:1434 usb_unbind_interface+0x1d8/0x8d0 drivers/usb/core/driver.c:458 __device_release_driver+0x3c6/0x6f0 drivers/base/dd.c:1152 device_release_driver_internal drivers/base/dd.c:1183 [inline] device_release_driver+0x26/0x40 drivers/base/dd.c:1206 bus_remove_device+0x2dc/0x4a0 drivers/base/bus.c:533 device_del+0x502/0xec0 drivers/base/core.c:3108 usb_disable_device+0x34d/0x690 drivers/usb/core/message.c:1410 usb_disconnect.cold+0x251/0x742 drivers/usb/core/hub.c:2217 hub_port_connect drivers/usb/core/hub.c:5059 [inline] hub_port_connect_change drivers/usb/core/hub.c:5348 [inline] port_event drivers/usb/core/hub.c:5494 [inline] hub_event+0x1965/0x3e60 drivers/usb/core/hub.c:5576 process_one_work+0x933/0x15a0 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3af/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296