kobject: kobject_add_internal failed for hci0:201 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci0: failed to register connection device
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BUG: KASAN: wild-memory-access in l2cap_connect_cfm+0x872/0x1560
Read of size 4 at addr deacfffffffffc0c by task kworker/u11:2/5667

CPU: 0 UID: 0 PID: 5667 Comm: kworker/u11:2 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: hci0 hci_rx_work
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 kasan_report+0x117/0x150
 kasan_check_range+0x264/0x2c0
 l2cap_connect_cfm+0x872/0x1560
 hci_connect_cfm+0x95/0x140
 le_conn_complete_evt+0x1134/0x16b0
 hci_le_conn_complete_evt+0x187/0x470
 hci_event_packet+0x659/0xef0
 hci_rx_work+0x3ee/0x1040
 process_one_work+0x98b/0x1630
 worker_thread+0xb49/0x1140
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
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