------------[ cut here ]------------
workqueue: cannot queue hci_conn_timeout on wq hci3
WARNING: CPU: 1 PID: 10097 at kernel/workqueue.c:2256 __queue_work+0xd38/0xfb0 kernel/workqueue.c:2254
Modules linked in:
CPU: 1 UID: 0 PID: 10097 Comm: syz.5.1417 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__queue_work+0xd38/0xfb0 kernel/workqueue.c:2254
Code: 42 80 3c 20 00 74 08 4c 89 ef e8 83 1e 99 00 49 8b 75 00 49 81 c7 78 01 00 00 48 c7 c7 20 e1 89 8b 4c 89 fa e8 99 39 f9 ff 90 <0f> 0b 90 90 e9 1a f5 ff ff e8 8a 9e 35 00 90 0f 0b 90 e9 dd fc ff
RSP: 0018:ffffc90000a08b10 EFLAGS: 00010046
RAX: b658433190272b00 RBX: 0000000000000100 RCX: ffff888079145a00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 1ffff11005169b38 R08: ffff8880b8724253 R09: 1ffff110170e484a
R10: dffffc0000000000 R11: ffffed10170e484b R12: dffffc0000000000
R13: ffff88807b724960 R14: 0000000000000008 R15: ffff888028b4d978
FS:  0000555587ab9500(0000) GS:ffff888125d13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffed9508e00 CR3: 000000005870c000 CR4: 00000000003526f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1747
 expire_timers kernel/time/timer.c:1793 [inline]
 __run_timers kernel/time/timer.c:2372 [inline]
 __run_timer_base+0x646/0x860 kernel/time/timer.c:2384
 run_timer_base kernel/time/timer.c:2393 [inline]
 run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
 handle_softirqs+0x283/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lockdep_unregister_key+0x2c5/0x310 kernel/locking/lockdep.c:6616
Code: 65 48 8b 05 4d 3b 03 11 48 3b 44 24 10 0f 84 26 fe ff ff e8 0d c2 dc 09 e8 38 c3 dc 09 41 f7 c7 00 02 00 00 74 bd fb 40 84 ed <75> bc eb cd 90 0f 0b 90 e9 19 ff ff ff 90 0f 0b 90 e9 2a ff ff ff
RSP: 0018:ffffc900052df998 EFLAGS: 00000246
RAX: b658433190272b00 RBX: ffff888059a6e298 RCX: b658433190272b00
RDX: ffffffff93649338 RSI: ffffffff8d9cdcb4 RDI: ffffffff8be33e00
RBP: ffff888059a6e200 R08: 0000000000000000 R09: ffffffff81aa9748
R10: dffffc0000000000 R11: fffffbfff1f47527 R12: 0000000000000000
R13: 0000000000001000 R14: 0000000000000000 R15: 0000000000000a03
 __qdisc_destroy+0x166/0x420 net/sched/sch_generic.c:1083
 netdev_for_each_tx_queue include/linux/netdevice.h:2660 [inline]
 dev_shutdown+0x93/0x440 net/sched/sch_generic.c:1494
 unregister_netdevice_many_notify+0xe0f/0x1ff0 net/core/dev.c:12154
 unregister_netdevice_many net/core/dev.c:12229 [inline]
 unregister_netdevice_queue+0x33c/0x380 net/core/dev.c:12073
 unregister_netdevice include/linux/netdevice.h:3385 [inline]
 __tun_detach+0xda4/0x1560 drivers/net/tun.c:621
 tun_detach drivers/net/tun.c:637 [inline]
 tun_chr_close+0x10a/0x1c0 drivers/net/tun.c:3433
 __fput+0x44c/0xa70 fs/file_table.c:468
 task_work_run+0x1d1/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f906598eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd53457718 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f9065bd7da0 RCX: 00007f906598eba9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f9065bd7da0 R08: 00000000000000b4 R09: 0000000853457a0f
R10: 00000000003ffd28 R11: 0000000000000246 R12: 000000000003f2f9
R13: 00007f9065bd6090 R14: ffffffffffffffff R15: 00007ffd53457830
 </TASK>
----------------
Code disassembly (best guess):
   0:	65 48 8b 05 4d 3b 03 	mov    %gs:0x11033b4d(%rip),%rax        # 0x11033b55
   7:	11
   8:	48 3b 44 24 10       	cmp    0x10(%rsp),%rax
   d:	0f 84 26 fe ff ff    	je     0xfffffe39
  13:	e8 0d c2 dc 09       	call   0x9dcc225
  18:	e8 38 c3 dc 09       	call   0x9dcc355
  1d:	41 f7 c7 00 02 00 00 	test   $0x200,%r15d
  24:	74 bd                	je     0xffffffe3
  26:	fb                   	sti
  27:	40 84 ed             	test   %bpl,%bpl
* 2a:	75 bc                	jne    0xffffffe8 <-- trapping instruction
  2c:	eb cd                	jmp    0xfffffffb
  2e:	90                   	nop
  2f:	0f 0b                	ud2
  31:	90                   	nop
  32:	e9 19 ff ff ff       	jmp    0xffffff50
  37:	90                   	nop
  38:	0f 0b                	ud2
  3a:	90                   	nop
  3b:	e9 2a ff ff ff       	jmp    0xffffff6a