------------[ cut here ]------------
workqueue: cannot queue hci_cmd_timeout on wq hci2
WARNING: CPU: 1 PID: 9551 at kernel/workqueue.c:2258 __queue_work+0xd62/0xfe0 kernel/workqueue.c:2256
Modules linked in:
CPU: 1 UID: 0 PID: 9551 Comm: syz.1.993 Not tainted 6.16.0-rc5-syzkaller-00205-g531d0d32de3e #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__queue_work+0xd62/0xfe0 kernel/workqueue.c:2256
Code: 42 80 3c 20 00 74 08 4c 89 ef e8 19 d7 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 54 35 00 90 0f 0b 90 e9 dd fc ff
RSP: 0018:ffffc90000a08b08 EFLAGS: 00010046
RAX: 432e9e4d40816600 RBX: 0000000000000100 RCX: ffff888030411e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 1ffff1100a049938 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfaa64 R12: dffffc0000000000
R13: ffff8880340e8988 R14: 0000000000000008 R15: ffff88805024c978
FS:  00007f832d3d56c0(0000) GS:ffff888125d1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f01f65743e0 CR3: 000000007def8000 CR4: 00000000003526f0
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:lockdep_unregister_key+0x2c5/0x310 kernel/locking/lockdep.c:6619
Code: 65 48 8b 05 6d ec 01 11 48 3b 44 24 10 0f 84 26 fe ff ff e8 0d d4 d0 09 e8 38 d5 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:ffffc9000461eed8 EFLAGS: 00000202
RAX: 432e9e4d40816600 RBX: 0000000000000000 RCX: 432e9e4d40816600
RDX: ffffffff93640318 RSI: ffffffff8d9ac47f RDI: ffffffff8be29dc0
RBP: ffff888024599201 R08: 0000000000000000 R09: ffffffff81ab4dc8
R10: dffffc0000000000 R11: fffffbfff1f43e7f R12: 0000000000000000
R13: 0000000000001000 R14: 0000000000000000 R15: 0000000000000203
 __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
 rtnl_delete_link net/core/rtnetlink.c:3511 [inline]
 rtnl_dellink+0x488/0x710 net/core/rtnetlink.c:3553
 rtnetlink_rcv_msg+0x7cc/0xb70 net/core/rtnetlink.c:6944
 netlink_rcv_skb+0x205/0x470 net/netlink/af_netlink.c:2552
 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
 netlink_unicast+0x759/0x8e0 net/netlink/af_netlink.c:1346
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:727
 ____sys_sendmsg+0x505/0x830 net/socket.c:2566
 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620
 __sys_sendmsg net/socket.c:2652 [inline]
 __do_sys_sendmsg net/socket.c:2657 [inline]
 __se_sys_sendmsg net/socket.c:2655 [inline]
 __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2655
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f832f58e929
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:00007f832d3d5038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f832f7b6080 RCX: 00007f832f58e929
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000003
RBP: 00007f832f610ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f832f7b6080 R15: 00007ffceee6be88
 </TASK>
----------------
Code disassembly (best guess):
   0:	65 48 8b 05 6d ec 01 	mov    %gs:0x1101ec6d(%rip),%rax        # 0x1101ec75
   7:	11
   8:	48 3b 44 24 10       	cmp    0x10(%rsp),%rax
   d:	0f 84 26 fe ff ff    	je     0xfffffe39
  13:	e8 0d d4 d0 09       	call   0x9d0d425
  18:	e8 38 d5 d0 09       	call   0x9d0d555
  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