------------[ cut here ]------------
workqueue: cannot queue hci_conn_timeout on wq hci5
WARNING: kernel/workqueue.c:2306 at __queue_work+0xd91/0x10f0 kernel/workqueue.c:2305, 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 05/09/2026
Workqueue: events l2cap_chan_timeout
RIP: 0010:__queue_work+0xdae/0x10f0 kernel/workqueue.c:2305
Code: 81 c3 68 01 00 00 4c 8d 35 2f 91 02 0e 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 ac df a3 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:ffffc900000e7938 EFLAGS: 00010046
RAX: 1ffff1100c36a15b RBX: ffff888032f4c968 RCX: ffff88801d2d5d00
RDX: ffff888032f4c968 RSI: ffffffff8a25b830 RDI: ffffffff8f8f9b60
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100c36a159 R12: dffffc0000000000
R13: ffff888032f4c800 R14: ffffffff8f8f9b60 R15: ffff888061b50ac0
FS:  0000000000000000(0000) GS:ffff888125eca000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000ed0 CR3: 00000000644dc000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 queue_delayed_work_on+0x11a/0x1e0 kernel/workqueue.c:2620
 l2cap_chan_del+0x286/0x600 net/bluetooth/l2cap_core.c:673
 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+0x93a/0x12b0 kernel/workqueue.c:3326
 process_scheduled_works kernel/workqueue.c:3409 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3490
 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 2f 91 02 0e 	lea    0xe02912f(%rip),%r14        # 0xe02913c
   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 ac df a3 00       	call   0xa3dfcc
  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