------------[ cut here ]------------
workqueue: cannot queue hci_conn_timeout on wq hci5
WARNING: kernel/workqueue.c:2306 at __queue_work+0xd51/0x10a0 kernel/workqueue.c:2305, CPU#1: kworker/1:1/13187
Modules linked in:
CPU: 1 UID: 0 PID: 13187 Comm: kworker/1:1 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Workqueue: events l2cap_chan_timeout
RIP: 0010:__queue_work+0xd6d/0x10a0 kernel/workqueue.c:2305
Code: 49 81 c7 70 01 00 00 4c 8d 35 0f 3c cd 0e 48 89 f8 48 c1 e8 03 80 3c 18 00 74 05 e8 ed f4 a6 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:ffffc900049bf8b0 EFLAGS: 00010046
RAX: 1ffff1100b3f114b RBX: dffffc0000000000 RCX: ffff88807e410000
RDX: ffff8880322b7970 RSI: ffffffff8ac95870 RDI: ffffffff905b0460
RBP: 0000000000000020 R08: ffff888059f88a47 R09: 1ffff1100b3f1148
R10: dffffc0000000000 R11: ffffed100b3f1149 R12: 0000000000000008
R13: ffff888059f88a40 R14: ffffffff905b0460 R15: ffff8880322b7970
FS:  0000000000000000(0000) GS:ffff888125036000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa79b305ff8 CR3: 000000005399d000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 queue_delayed_work_on+0x11a/0x1e0 kernel/workqueue.c:2620
 l2cap_chan_del+0x286/0x600 net/bluetooth/l2cap_core.c:701
 l2cap_chan_close+0x4d7/0x770 net/bluetooth/l2cap_core.c:-1
 l2cap_chan_timeout+0x21e/0x470 net/bluetooth/l2cap_core.c:433
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa88/0x14c0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x38b/0x480 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 0f 3c cd 0e 	lea    0xecd3c0f(%rip),%r14        # 0xecd3c1d
   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 ed f4 a6 00       	call   0xa6f50d
  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