------------[ cut here ]------------
workqueue: cannot queue hci_conn_timeout on wq hci0
WARNING: kernel/workqueue.c:2258 at 0x0, CPU#1: kworker/1:1/20111
Modules linked in:
CPU: 1 UID: 0 PID: 20111 Comm: kworker/1:1 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:2256
Code: 83 c5 18 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef e8 c6 50 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 28 ea
RSP: 0018:ffffc900039df770 EFLAGS: 00010086
RAX: 1ffff1100f3d612c RBX: 0000000000000008 RCX: ffff8880595a3d00
RDX: ffff88807a873978 RSI: ffffffff8a449e20 RDI: ffffffff8f830a90
RBP: 0000000000000020 R08: ffff888079eb094f R09: 1ffff1100f3d6129
R10: dffffc0000000000 R11: ffffed100f3d612a R12: dffffc0000000000
R13: ffff888079eb0960 R14: ffffffff8f830a90 R15: ffff88807a873978
FS:  0000000000000000(0000) GS:ffff8881261c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000004a030 CR3: 0000000057c2e000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 queue_delayed_work_on+0x18b/0x280 kernel/workqueue.c:2561
 l2cap_chan_del+0x285/0x5e0 net/bluetooth/l2cap_core.c:672
 l2cap_chan_close+0x597/0x980 net/bluetooth/l2cap_core.c:-1
 l2cap_chan_timeout+0x158/0x390 net/bluetooth/l2cap_core.c:431
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 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 c6 50 9c 00       	call   0x9c50df
  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:	28 ea                	sub    %ch,%dl