kobject: kobject_add_internal failed for hci1:0 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci1: failed to register connection device
Bluetooth: hci1: unexpected event for opcode 0x1408
------------[ cut here ]------------
refcnt < 0
WARNING: net/bluetooth/hci_conn.c:634 at hci_conn_timeout+0xff/0x2c0, CPU#0: kworker/u11:2/3668
Modules linked in:
CPU: 0 UID: 0 PID: 3668 Comm: kworker/u11:2 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: hci1 hci_conn_timeout
RIP: 0010:hci_conn_timeout+0xff/0x2c0
Code: 48 89 df e8 23 b6 09 00 eb 07 e8 ec 73 28 f7 b0 13 0f b6 f0 48 89 df 5b 41 5c 41 5e 41 5f 5d e9 97 9c fe ff e8 d2 73 28 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:ffffc9000a647ab0 EFLAGS: 00010293
RAX: ffffffff8a9d448e RBX: ffff888174f0c000 RCX: ffff88811b7e9dc0
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: 00000000ffffffff R08: ffff888174f0c013 R09: 1ffff1102e9e1802
R10: dffffc0000000000 R11: ffffed102e9e1803 R12: dffffc0000000000
R13: ffff888174f0ca40 R14: ffff888174f0ca40 R15: ffff888174f0c010
FS:  0000000000000000(0000) GS:ffff88818dc99000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4917417dac CR3: 000000000e74a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x389/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
