Bluetooth: hci5: command 0x0406 tx timeout
------------[ cut here ]------------
refcnt < 0
WARNING: net/bluetooth/hci_conn.c:641 at hci_conn_timeout+0xff/0x2c0 net/bluetooth/hci_conn.c:641, CPU#1: kworker/u9:1/4926
Modules linked in:
CPU: 1 UID: 0 PID: 4926 Comm: kworker/u9:1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
Workqueue: hci5 hci_conn_timeout
RIP: 0010:hci_conn_timeout+0xff/0x2c0 net/bluetooth/hci_conn.c:641
Code: 48 89 df e8 33 f5 09 00 eb 07 e8 9c 55 f0 f6 b0 13 0f b6 f0 48 89 df 5b 41 5c 41 5e 41 5f 5d e9 d7 9f fe ff e8 82 55 f0 f6 90 <0f> 0b 90 eb 8c 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 31 ff ff ff
RSP: 0018:ffffc9000e76fab0 EFLAGS: 00010293
RAX: ffffffff8ad76fce RBX: ffff888023390000 RCX: ffff888028e2ddc0
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: 00000000ffffffff R08: ffff888023390013 R09: 1ffff11004672002
R10: dffffc0000000000 R11: ffffed1004672003 R12: dffffc0000000000
R13: ffffffff818f97ca R14: ffff888023390a50 R15: ffff888023390010
FS:  0000000000000000(0000) GS:ffff888124dd6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff1f0db9680 CR3: 000000007446b000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 process_one_work kernel/workqueue.c:3396 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 kthread+0x38b/0x480 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>