BUG: sleeping function called from invalid context at kernel/workqueue.c:3028 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 3680, name: kworker/0:4 preempt_count: 100, expected: 0 RCU nest depth: 0, expected: 0 5 locks held by kworker/0:4/3680: #0: ffff888011dcf938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888011dcf938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888011dcf938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888011dcf938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline] #0: ffff888011dcf938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline] #0: ffff888011dcf938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x890/0x1680 kernel/workqueue.c:2278 #1: ffffc900027afdb8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1680 kernel/workqueue.c:2282 #2: ffff88801dd47220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #2: ffff88801dd47220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c5/0x44d0 drivers/usb/core/hub.c:5688 #3: ffff888029cc8220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #3: ffff888029cc8220 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x43/0x78e drivers/usb/core/hub.c:2219 #4: ffffc90000007d70 ((&dum_hcd->timer)){+.-.}-{0:0}, at: lockdep_copy_map include/linux/lockdep.h:35 [inline] #4: ffffc90000007d70 ((&dum_hcd->timer)){+.-.}-{0:0}, at: call_timer_fn+0xd5/0x6b0 kernel/time/timer.c:1411 irq event stamp: 452303 hardirqs last enabled at (452302): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (452302): [] _raw_spin_unlock_irq+0x1f/0x40 kernel/locking/spinlock.c:202 hardirqs last disabled at (452303): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (452303): [] _raw_spin_lock_irqsave+0x4e/0x50 kernel/locking/spinlock.c:162 softirqs last enabled at (451918): [] spin_unlock_bh include/linux/spinlock.h:399 [inline] softirqs last enabled at (451918): [] nsim_dev_trap_report drivers/net/netdevsim/dev.c:817 [inline] softirqs last enabled at (451918): [] nsim_dev_trap_report_work+0x855/0xbc0 drivers/net/netdevsim/dev.c:843 softirqs last disabled at (452295): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last disabled at (452295): [] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637 Preemption disabled at: [] softirq_handle_begin kernel/softirq.c:396 [inline] [] __do_softirq+0xe1/0x9c2 kernel/softirq.c:534 CPU: 0 PID: 3680 Comm: kworker/0:4 Not tainted 5.16.0-rc6-next-20211222-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 __might_resched.cold+0x222/0x26b kernel/sched/core.c:9583 start_flush_work kernel/workqueue.c:3028 [inline] __flush_work+0x109/0xb10 kernel/workqueue.c:3092 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3180 hci_cmd_sync_cancel net/bluetooth/hci_sync.c:346 [inline] hci_cmd_sync_cancel+0xe1/0x170 net/bluetooth/hci_sync.c:338 btusb_intr_complete+0x3d3/0x4a0 drivers/bluetooth/btusb.c:975 __usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1656 usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1726 dummy_timer+0x11f9/0x32b0 drivers/usb/gadget/udc/dummy_hcd.c:1987 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734 __run_timers kernel/time/timer.c:1715 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:lock_release+0x3f1/0x720 kernel/locking/lockdep.c:5647 Code: 7e 83 f8 01 0f 85 8d 01 00 00 9c 58 f6 c4 02 0f 85 78 01 00 00 48 f7 04 24 00 02 00 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c5 48 c7 45 00 00 00 00 00 c7 45 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffffc900027af738 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: e8a533364987126d RCX: ffffc900027af788 RDX: 1ffff11003ed714b RSI: 0000000000000000 RDI: 0000000000000000 RBP: 1ffff920004f5ee9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000004 R13: 0000000000000005 R14: ffff88801f6b8a60 R15: ffff88801f6b8000 up_write+0x26/0x470 kernel/locking/rwsem.c:1566 kernfs_remove_by_name_ns+0xb3/0x110 fs/kernfs/dir.c:1567 kernfs_remove_by_name include/linux/kernfs.h:572 [inline] remove_files+0x96/0x1c0 fs/sysfs/group.c:28 sysfs_remove_group+0x87/0x170 fs/sysfs/group.c:288 sysfs_remove_groups fs/sysfs/group.c:312 [inline] sysfs_remove_groups+0x5c/0xa0 fs/sysfs/group.c:304 device_remove_groups drivers/base/core.c:2479 [inline] device_remove_attrs+0xcb/0x170 drivers/base/core.c:2679 device_del+0x4fa/0xd50 drivers/base/core.c:3575 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x27a/0x78e drivers/usb/core/hub.c:2228 hub_port_connect drivers/usb/core/hub.c:5202 [inline] hub_port_connect_change drivers/usb/core/hub.c:5502 [inline] port_event drivers/usb/core/hub.c:5660 [inline] hub_event+0x1e39/0x44d0 drivers/usb/core/hub.c:5742 process_one_work+0x9ac/0x1680 kernel/workqueue.c:2307 worker_thread+0x652/0x11c0 kernel/workqueue.c:2454 kthread+0x2e9/0x3a0 kernel/kthread.c:381 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: 7e 83 jle 0xffffff85 2: f8 clc 3: 01 0f add %ecx,(%rdi) 5: 85 8d 01 00 00 9c test %ecx,-0x63ffffff(%rbp) b: 58 pop %rax c: f6 c4 02 test $0x2,%ah f: 0f 85 78 01 00 00 jne 0x18d 15: 48 f7 04 24 00 02 00 testq $0x200,(%rsp) 1c: 00 1d: 74 01 je 0x20 1f: fb sti 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 48 01 c5 add %rax,%rbp <-- trapping instruction 2d: 48 c7 45 00 00 00 00 movq $0x0,0x0(%rbp) 34: 00 35: c7 45 08 00 00 00 00 movl $0x0,0x8(%rbp) 3c: 48 rex.W 3d: 8b .byte 0x8b 3e: 84 .byte 0x84 3f: 24 .byte 0x24