------------[ cut here ]------------
workqueue: cannot queue hci_conn_timeout on wq hci3
WARNING: kernel/workqueue.c:2298 at __queue_work+0xd87/0x1090 kernel/workqueue.c:2296, CPU#0: kworker/0:0/9
Modules linked in:
CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: events l2cap_chan_timeout
RIP: 0010:__queue_work+0xda4/0x1090 kernel/workqueue.c:2296
Code: 81 c7 68 01 00 00 4c 8d 35 e9 6f 01 0e 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 16 8f a2 00 49 8b 75 18 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef
RSP: 0018:ffffc900000e78f0 EFLAGS: 00010046
RAX: 1ffff1100cfa515b RBX: 0000000000000008 RCX: ffff88801d2ddd00
RDX: ffff88803e2a6168 RSI: ffffffff8a20d180 RDI: ffffffff8f8ec600
RBP: 0000000000000020 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100cfa5159 R12: dffffc0000000000
R13: ffff888067d28ac0 R14: ffffffff8f8ec600 R15: ffff88803e2a6168
FS:  0000000000000000(0000) GS:ffff888125eec000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5f21b07e9c CR3: 000000000ddb8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 queue_delayed_work_on+0x11a/0x1e0 kernel/workqueue.c:2612
 l2cap_chan_del+0x285/0x610 net/bluetooth/l2cap_core.c:674
 l2cap_chan_close+0x4d7/0x770 net/bluetooth/l2cap_core.c:-1
 l2cap_chan_timeout+0x158/0x3b0 net/bluetooth/l2cap_core.c:433
 process_one_work+0x98b/0x1630 kernel/workqueue.c:3318
 process_scheduled_works kernel/workqueue.c:3401 [inline]
 worker_thread+0xb49/0x1140 kernel/workqueue.c:3482
 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 c7 68 01 00 00    	add    $0x168,%edi
   6:	4c 8d 35 e9 6f 01 0e 	lea    0xe016fe9(%rip),%r14        # 0xe016ff6
   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 16 8f a2 00       	call   0xa28f36
  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:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  3b:	74 08                	je     0x45
  3d:	4c 89 ef             	mov    %r13,%rdi