Bluetooth: hci2: command 0x0406 tx timeout
------------[ cut here ]------------
refcnt < 0
WARNING: net/bluetooth/hci_conn.c:631 at hci_conn_timeout+0xff/0x2c0 net/bluetooth/hci_conn.c:631, CPU#0: kworker/u9:0/10326
Modules linked in:
CPU: 0 UID: 0 PID: 10326 Comm: kworker/u9:0 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: hci2 hci_conn_timeout
RIP: 0010:hci_conn_timeout+0xff/0x2c0 net/bluetooth/hci_conn.c:631
Code: 48 89 df e8 f3 b4 09 00 eb 07 e8 cc a9 a0 f7 b0 13 0f b6 f0 48 89 df 5b 41 5c 41 5e 41 5f 5d e9 67 a0 fe ff e8 b2 a9 a0 f7 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:ffffc9000698fb50 EFLAGS: 00010293
RAX: ffffffff8a246ece RBX: ffff8880342c8000 RCX: ffff88802f0f8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1006859003 R12: dffffc0000000000
R13: ffff88805ffb5c08 R14: ffff8880342c8ac0 R15: ffff8880342c8010
FS:  0000000000000000(0000) GS:ffff888125ed4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd62a098000 CR3: 00000000611a0000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 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>