------------[ cut here ]------------
workqueue: cannot queue hci_conn_timeout on wq hci0
WARNING: kernel/workqueue.c:2306 at __queue_work+0xd91/0x10f0 kernel/workqueue.c:2305, CPU#1: ktimers/1/30
Modules linked in:
CPU: 1 UID: 0 PID: 30 Comm: ktimers/1 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__queue_work+0xdae/0x10f0 kernel/workqueue.c:2305
Code: 81 c3 68 01 00 00 4c 8d 35 cf 6e 02 0e 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 4c ec a3 00 49 8b 77 18 4c 89 f7 48 89 da <67> 48 0f b9 3a 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff
RSP: 0018:ffffc90000a4f990 EFLAGS: 00010046
RAX: 1ffff110078bc15b RBX: ffff88803bd39168 RCX: ffff88801de89f00
RDX: ffff88803bd39168 RSI: ffffffff8a256c50 RDI: ffffffff8f8f7860
RBP: 0000000000000100 R08: 0000000000000000 R09: 0000000000000100
R10: dffffc0000000000 R11: ffffffff818d10c0 R12: dffffc0000000000
R13: 0000000000000008 R14: ffffffff8f8f7860 R15: ffff88803c5e0ac0
FS:  0000000000000000(0000) GS:ffff888125fcd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd830b04ff8 CR3: 0000000063d52000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 call_timer_fn+0x192/0x5e0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1794 [inline]
 __run_timers kernel/time/timer.c:2374 [inline]
 __run_timer_base+0x73c/0x9b0 kernel/time/timer.c:2386
 run_timer_base kernel/time/timer.c:2395 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
 handle_softirqs+0x1d9/0x6c0 kernel/softirq.c:626
 __do_softirq kernel/softirq.c:660 [inline]
 run_ktimerd+0x69/0x100 kernel/softirq.c:1155
 smpboot_thread_fn+0x57c/0xa80 kernel/smpboot.c:160
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess):
   0:	81 c3 68 01 00 00    	add    $0x168,%ebx
   6:	4c 8d 35 cf 6e 02 0e 	lea    0xe026ecf(%rip),%r14        # 0xe026edc
   d:	48 89 f8             	mov    %rdi,%rax
  10:	48 c1 e8 03          	shr    $0x3,%rax
  14:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  19:	74 05                	je     0x20
  1b:	e8 4c ec a3 00       	call   0xa3ec6c
  20:	49 8b 77 18          	mov    0x18(%r15),%rsi
  24:	4c 89 f7             	mov    %r14,%rdi
  27:	48 89 da             	mov    %rbx,%rdx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	4c 89 f8             	mov    %r15,%rax
  32:	48 c1 e8 03          	shr    $0x3,%rax
  36:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  3b:	74 08                	je     0x45
  3d:	4c 89 ff             	mov    %r15,%rdi