------------[ cut here ]------------
workqueue: cannot queue hci_cmd_timeout on wq hci2
WARNING: CPU: 0 PID: 6608 at kernel/workqueue.c:2258 __queue_work+0xd62/0xfe0 kernel/workqueue.c:2256
Modules linked in:
CPU: 0 UID: 0 PID: 6608 Comm: kworker/u8:14 Not tainted 6.16.0-rc3-syzkaller-g6e5cae9ddae7 #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 29 26 9a 00 49 8b 75 00 49 81 c7 78 01 00 00 48 c7 c7 40 e1 89 8b 4c 89 fa e8 1f 34 f9 ff 90 <0f> 0b 90 90 e9 f1 f4 ff ff e8 00 91 35 00 90 0f 0b 90 e9 dd fc ff
RSP: 0018:ffffc90000007b08 EFLAGS: 00010046
RAX: 8b08e61501e80d00 RBX: 0000000000000100 RCX: ffff88802ced3c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 1ffff1100a06ee38 R08: ffff8880b8624293 R09: 1ffff110170c4852
R10: dffffc0000000000 R11: ffffed10170c4853 R12: dffffc0000000000
R13: ffff88807f0cc988 R14: 0000000000000008 R15: ffff888050377178
FS:  0000000000000000(0000) GS:ffff888125c19000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f30f7e3afab CR3: 000000007fba2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
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:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_single+0x3a9/0x590 kernel/smp.c:679
Code: 33 44 89 f6 83 e6 01 31 ff e8 b3 9a 0b 00 41 83 e6 01 75 11 e8 68 96 0b 00 4d 89 fe eb 3f e8 5e 96 0b 00 eb 3c 4d 89 fe f3 90 <43> 0f b6 04 2c 84 c0 75 0f f7 03 01 00 00 00 74 1d e8 41 96 0b 00
RSP: 0018:ffffc9001c287480 EFLAGS: 00000293
RAX: ffffffff81b4cdaf RBX: ffffc9001c2874c8 RCX: ffff88802ced3c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9001c287570 R08: ffffffff8fa1f1f7 R09: 1ffffffff1f43e3e
R10: dffffc0000000000 R11: ffffffff81703110 R12: 1ffff92003850e99
R13: dffffc0000000000 R14: 1ffff92003850e94 R15: 1ffff92003850e94
 rcu_barrier+0x360/0x570 kernel/rcu/tree.c:3838
 netdev_run_todo+0x327/0xea0 net/core/dev.c:11376
 ieee80211_unregister_hw+0x128/0x2c0 net/mac80211/main.c:1693
 mac80211_hwsim_del_radio+0x275/0x460 drivers/net/wireless/virtual/mac80211_hwsim.c:5671
 hwsim_exit_net+0x584/0x640 drivers/net/wireless/virtual/mac80211_hwsim.c:6551
 ops_exit_list net/core/net_namespace.c:200 [inline]
 ops_undo_list+0x49a/0x990 net/core/net_namespace.c:253
 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:	33 44 89 f6          	xor    -0xa(%rcx,%rcx,4),%eax
   4:	83 e6 01             	and    $0x1,%esi
   7:	31 ff                	xor    %edi,%edi
   9:	e8 b3 9a 0b 00       	call   0xb9ac1
   e:	41 83 e6 01          	and    $0x1,%r14d
  12:	75 11                	jne    0x25
  14:	e8 68 96 0b 00       	call   0xb9681
  19:	4d 89 fe             	mov    %r15,%r14
  1c:	eb 3f                	jmp    0x5d
  1e:	e8 5e 96 0b 00       	call   0xb9681
  23:	eb 3c                	jmp    0x61
  25:	4d 89 fe             	mov    %r15,%r14
  28:	f3 90                	pause
* 2a:	43 0f b6 04 2c       	movzbl (%r12,%r13,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	75 0f                	jne    0x42
  33:	f7 03 01 00 00 00    	testl  $0x1,(%rbx)
  39:	74 1d                	je     0x58
  3b:	e8 41 96 0b 00       	call   0xb9681