------------[ cut here ]------------
workqueue: cannot queue hci_cmd_timeout on wq hci0
WARNING: kernel/workqueue.c:2437 at __queue_work+0xe19/0x1380 kernel/workqueue.c:2436, CPU#1: ktimers/1/28
Modules linked in:
CPU: 1 UID: 0 PID: 28 Comm: ktimers/1 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:__queue_work+0xe35/0x1380 kernel/workqueue.c:2436
Code: 49 81 c7 70 01 00 00 4c 8d 35 c7 5e 49 0f 48 89 f8 48 c1 e8 03 80 3c 18 00 74 05 e8 75 99 ab 00 49 8b 75 18 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 4c 89 e8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8
RSP: 0018:ffffc90000a2f988 EFLAGS: 00010046
RAX: 1ffff1100803f953 RBX: dffffc0000000000 RCX: ffff88801e6a5dc0
RDX: ffff88802cb35170 RSI: ffffffff8a624480 RDI: ffffffff90d83d80
RBP: 0000000000000100 R08: 0000000000000100 R09: 0000000000000100
R10: dffffc0000000000 R11: ffffffff818ee7f0 R12: 0000000000000000
R13: ffff8880401fca80 R14: ffffffff90d83d80 R15: ffff88802cb35170
FS:  0000000000000000(0000) GS:ffff888124816000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ea16ff8 CR3: 0000000032de6000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1749
 expire_timers kernel/time/timer.c:1795 [inline]
 __run_timers kernel/time/timer.c:2375 [inline]
 __run_timer_base+0x73c/0x9b0 kernel/time/timer.c:2387
 run_timer_base kernel/time/timer.c:2396 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2406
 handle_softirqs+0x1d4/0x6c0 kernel/softirq.c:669
 __do_softirq kernel/softirq.c:703 [inline]
 run_ktimerd+0x6a/0x100 kernel/softirq.c:1208
 smpboot_thread_fn+0x5f8/0xb30 kernel/smpboot.c:162
 kthread+0x38b/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:	49 81 c7 70 01 00 00 	add    $0x170,%r15
   7:	4c 8d 35 c7 5e 49 0f 	lea    0xf495ec7(%rip),%r14        # 0xf495ed5
   e:	48 89 f8             	mov    %rdi,%rax
  11:	48 c1 e8 03          	shr    $0x3,%rax
  15:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  19:	74 05                	je     0x20
  1b:	e8 75 99 ab 00       	call   0xab9995
  20:	49 8b 75 18          	mov    0x18(%r13),%rsi
  24:	4c 89 f7             	mov    %r14,%rdi
  27:	4c 89 fa             	mov    %r15,%rdx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	4c 89 e8             	mov    %r13,%rax
  32:	48 c1 e8 03          	shr    $0x3,%rax
  36:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  3a:	74 08                	je     0x44
  3c:	4c 89 ef             	mov    %r13,%rdi
  3f:	e8                   	.byte 0xe8