ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
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
==================================================================
BUG: KASAN: wild-memory-access in instrument_atomic_read include/linux/instrumented.h:82 [inline]
BUG: KASAN: wild-memory-access in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
BUG: KASAN: wild-memory-access in l2cap_chan_lock include/net/bluetooth/l2cap.h:828 [inline]
BUG: KASAN: wild-memory-access in l2cap_conn_ready net/bluetooth/l2cap_core.c:1618 [inline]
BUG: KASAN: wild-memory-access in l2cap_connect_cfm+0x7da/0x1390 net/bluetooth/l2cap_core.c:7353
Read of size 4 at addr deacfffffffffc8c by task kworker/u9:5/5838

CPU: 0 UID: 0 PID: 5838 Comm: kworker/u9:5 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: hci0 hci_rx_work
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200
 instrument_atomic_read include/linux/instrumented.h:82 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 l2cap_chan_lock include/net/bluetooth/l2cap.h:828 [inline]
 l2cap_conn_ready net/bluetooth/l2cap_core.c:1618 [inline]
 l2cap_connect_cfm+0x7da/0x1390 net/bluetooth/l2cap_core.c:7353
 hci_connect_cfm+0x95/0x140 include/net/bluetooth/hci_core.h:2139
 le_conn_complete_evt+0xf65/0x1430 net/bluetooth/hci_event.c:5847
 hci_le_conn_complete_evt+0x187/0x470 net/bluetooth/hci_event.c:5873
 hci_event_func net/bluetooth/hci_event.c:7781 [inline]
 hci_event_packet+0x7af/0x12c0 net/bluetooth/hci_event.c:7838
 hci_rx_work+0x3ee/0x1040 net/bluetooth/hci_core.c:4077
 process_one_work+0x949/0x1650 kernel/workqueue.c:3279
 process_scheduled_works kernel/workqueue.c:3362 [inline]
 worker_thread+0xb46/0x1140 kernel/workqueue.c:3443
 kthread+0x388/0x470 kernel/kthread.c:467
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
==================================================================