------------[ cut here ]------------
workqueue: cannot queue hci_cmd_timeout on wq hci1
WARNING: CPU: 0 PID: 12743 at kernel/workqueue.c:2258 __queue_work+0xd62/0xfe0 kernel/workqueue.c:2256
Modules linked in:
CPU: 0 UID: 0 PID: 12743 Comm: kworker/u8:7 Not tainted 6.16.0-rc5-syzkaller-00266-g3f31a806a62e #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
RIP: 0010:__queue_work+0xd62/0xfe0 kernel/workqueue.c:2256
Code: 42 80 3c 20 00 74 08 4c 89 ef e8 99 d1 98 00 49 8b 75 00 49 81 c7 78 01 00 00 48 c7 c7 00 e9 89 8b 4c 89 fa e8 1f 34 f9 ff 90 <0f> 0b 90 90 e9 f1 f4 ff ff e8 40 51 35 00 90 0f 0b 90 e9 dd fc ff
RSP: 0018:ffffc90000007b08 EFLAGS: 00010046
RAX: ee8990888061a600 RBX: 0000000000000100 RCX: ffff88806a4b3c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 1ffff1100675cb38 R08: ffff8880b8624293 R09: 1ffff110170c4852
R10: dffffc0000000000 R11: ffffed10170c4853 R12: dffffc0000000000
R13: ffff888060dac988 R14: 0000000000000008 R15: ffff888033ae5978
FS:  0000000000000000(0000) GS:ffff888125c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe650d7f2d8 CR3: 0000000058458000 CR4: 00000000003526f0
DR0: 000000000000004b DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x17e/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+0x286/0x870 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:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7109
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 8b 6d 20 f6 e8 46 4b 57 f6 fb bf 01 00 00 00 <e8> 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc90002f674c0 EFLAGS: 00000282
RAX: ee8990888061a600 RBX: 0000000000000000 RCX: ee8990888061a600
RDX: 0000000000000006 RSI: ffffffff8d998d5c RDI: 0000000000000001
RBP: ffffc90002f67570 R08: ffffffff8fa1f5f7 R09: 1ffffffff1f43ebe
R10: dffffc0000000000 R11: fffffbfff1f43ebf R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920005ece98
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:lockdep_unregister_key+0x2c5/0x310 kernel/locking/lockdep.c:6619
Code: 65 48 8b 05 6d ef 01 11 48 3b 44 24 10 0f 84 26 fe ff ff e8 2d e7 d0 09 e8 58 e8 d0 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:ffffc90002f67638 EFLAGS: 00000246
RAX: ee8990888061a600 RBX: ffff888033d11a98 RCX: ee8990888061a600
RDX: ffffffff93640318 RSI: ffffffff8d9ac63c RDI: ffffffff8be29d80
RBP: ffff888033d11a00 R08: 0000000000000000 R09: ffffffff81ab4ac8
R10: dffffc0000000000 R11: fffffbfff1f43ebf R12: 0000000000000000
R13: 0000000000001000 R14: 0000000000000000 R15: 0000000000000202
 __qdisc_destroy+0x166/0x420 net/sched/sch_generic.c:1081
 qdisc_put net/sched/sch_generic.c:1107 [inline]
 dev_shutdown+0x34c/0x440 net/sched/sch_generic.c:1495
 unregister_netdevice_many_notify+0xea7/0x2320 net/core/dev.c:12065
 ops_exit_rtnl_list net/core/net_namespace.c:188 [inline]
 ops_undo_list+0x3dc/0x990 net/core/net_namespace.c:249
 cleanup_net+0x4c5/0x800 net/core/net_namespace.c:686
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess):
   0:	24 20                	and    $0x20,%al
   2:	f6 44 24 21 02       	testb  $0x2,0x21(%rsp)
   7:	74 0c                	je     0x15
   9:	90                   	nop
   a:	0f 0b                	ud2
   c:	48 f7 03 08 00 00 00 	testq  $0x8,(%rbx)
  13:	74 64                	je     0x79
  15:	bf 01 00 00 00       	mov    $0x1,%edi
  1a:	e8 8b 6d 20 f6       	call   0xf6206daa
  1f:	e8 46 4b 57 f6       	call   0xf6574b6a
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 1b ab ff ff       	call   0xffffab4a <-- trapping instruction
  2f:	48 c7 44 24 40 00 00 	movq   $0x0,0x40(%rsp)
  36:	00 00
  38:	9c                   	pushf
  39:	8f 44 24 40          	pop    0x40(%rsp)
  3d:	8b                   	.byte 0x8b
  3e:	44                   	rex.R
  3f:	24                   	.byte 0x24