------------[ cut here ]------------
workqueue: cannot queue hci_conn_timeout on wq hci4
WARNING: kernel/workqueue.c:2252 at __queue_work+0xd20/0xf90 kernel/workqueue.c:2250, CPU#1: kworker/1:6/5935
Modules linked in:
CPU: 1 UID: 0 PID: 5935 Comm: kworker/1:6 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events l2cap_chan_timeout
RIP: 0010:__queue_work+0xd4b/0xf90 kernel/workqueue.c:2250
Code: 83 c5 18 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef e8 76 c0 9c 00 49 8b 75 00 49 81 c7 78 01 00 00 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 48 83 c4 58 5b 41 5c 41 5d 41 5e 41 5f 5d e9 3d 18
RSP: 0018:ffffc90004f4f848 EFLAGS: 00010086
RAX: 1ffff1100f07d94b RBX: 0000000000000008 RCX: ffff88802ddf8000
RDX: ffff888027e55178 RSI: ffffffff8a556110 RDI: ffffffff8f850a60
RBP: 0000000000000020 R08: ffff8880783eca47 R09: 1ffff1100f07d948
R10: dffffc0000000000 R11: ffffed100f07d949 R12: dffffc0000000000
R13: ffff8880783eca58 R14: ffffffff8f850a60 R15: ffff888027e55178
FS:  0000000000000000(0000) GS:ffff888125f21000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4c88517d60 CR3: 000000007ec58000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 queue_delayed_work_on+0x11a/0x1d0 kernel/workqueue.c:2555
 l2cap_chan_del+0x285/0x620 net/bluetooth/l2cap_core.c:672
 l2cap_chan_close+0x4c2/0x760 net/bluetooth/l2cap_core.c:-1
 l2cap_chan_timeout+0x158/0x3b0 net/bluetooth/l2cap_core.c:431
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
----------------
Code disassembly (best guess):
   0:	83 c5 18             	add    $0x18,%ebp
   3:	4c 89 e8             	mov    %r13,%rax
   6:	48 c1 e8 03          	shr    $0x3,%rax
   a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
   f:	74 08                	je     0x19
  11:	4c 89 ef             	mov    %r13,%rdi
  14:	e8 76 c0 9c 00       	call   0x9cc08f
  19:	49 8b 75 00          	mov    0x0(%r13),%rsi
  1d:	49 81 c7 78 01 00 00 	add    $0x178,%r15
  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:	48 83 c4 58          	add    $0x58,%rsp
  33:	5b                   	pop    %rbx
  34:	41 5c                	pop    %r12
  36:	41 5d                	pop    %r13
  38:	41 5e                	pop    %r14
  3a:	41 5f                	pop    %r15
  3c:	5d                   	pop    %rbp
  3d:	e9                   	.byte 0xe9
  3e:	3d                   	.byte 0x3d
  3f:	18                   	.byte 0x18