------------[ cut here ]------------
workqueue: cannot queue hci_conn_timeout on wq hci3
WARNING: kernel/workqueue.c:2341 at __queue_work+0xdc3/0x1120 kernel/workqueue.c:2340, CPU#0: kworker/0:4/5696
Modules linked in:
CPU: 0 UID: 0 PID: 5696 Comm: kworker/0:4 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: events l2cap_chan_timeout
RIP: 0010:__queue_work+0xde0/0x1120 kernel/workqueue.c:2340
Code: 81 c3 68 01 00 00 4c 8d 35 dd f4 45 0e 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 7a 7a a4 00 49 8b 77 18 4c 89 f7 48 89 da <67> 48 0f b9 3a 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff
RSP: 0018:ffffc900058df910 EFLAGS: 00010046
RAX: 1ffff110076d615b RBX: ffff888037a7d968 RCX: ffff888021788000
RDX: ffff888037a7d968 RSI: ffffffff8a440090 RDI: ffffffff8fd374e0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10076d6159 R12: dffffc0000000000
R13: ffff888037a7d800 R14: ffffffff8fd374e0 R15: ffff88803b6b0ac0
FS:  0000000000000000(0000) GS:ffff8881259f2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1779997dac CR3: 0000000031638000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000086
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 queue_delayed_work_on+0x11a/0x1e0 kernel/workqueue.c:2657
 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+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 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 c3 68 01 00 00    	add    $0x168,%ebx
   6:	4c 8d 35 dd f4 45 0e 	lea    0xe45f4dd(%rip),%r14        # 0xe45f4ea
   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 7a 7a a4 00       	call   0xa47a9a
  20:	49 8b 77 18          	mov    0x18(%r15),%rsi
  24:	4c 89 f7             	mov    %r14,%rdi
  27:	48 89 da             	mov    %rbx,%rdx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	4c 89 f8             	mov    %r15,%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 ff             	mov    %r15,%rdi