------------[ cut here ]------------
refcnt < 0
WARNING: net/bluetooth/hci_conn.c:567 at hci_conn_timeout+0x16a/0x230 net/bluetooth/hci_conn.c:567, CPU#0: kworker/u9:6/5818
Modules linked in:
CPU: 0 UID: 0 PID: 5818 Comm: kworker/u9:6 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: hci3 hci_conn_timeout
RIP: 0010:hci_conn_timeout+0x16a/0x230 net/bluetooth/hci_conn.c:567
Code: 44 0f b6 2d 83 a1 4d 06 31 ff 41 83 e5 40 44 89 ee e8 ca 3f 81 f7 45 84 ed 0f 84 02 ff ff ff e9 d6 23 ea f6 e8 67 45 81 f7 90 <0f> 0b 90 e8 5e 45 81 f7 48 8d bb fd f5 ff ff 48 b8 00 00 00 00 00
RSP: 0018:ffffc90003c67c18 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888079dc0a40 RCX: ffffffff8a87899f
RDX: ffff88807970a4c0 RSI: ffffffff8a878a99 RDI: ffff88807970a4c0
RBP: 00000000ffffffff R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000000 R12: ffff888079dc0000
R13: ffff88807970a984 R14: ffffffff90d9d404 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888124342000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9f24fe9e80 CR3: 00000000545b7000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 process_one_work+0xa23/0x19a0 kernel/workqueue.c:3276
 process_scheduled_works kernel/workqueue.c:3359 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3440
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>