kobject: kobject_add_internal failed for hci2:201 with -EEXIST, don't try to register things with the same name in the same directory.
Bluetooth: hci2: failed to register connection device
==================================================================
BUG: KASAN: wild-memory-access in instrument_atomic_read include/linux/instrumented.h:68 [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:827 [inline]
BUG: KASAN: wild-memory-access in l2cap_conn_ready net/bluetooth/l2cap_core.c:1621 [inline]
BUG: KASAN: wild-memory-access in l2cap_connect_cfm+0x538/0xde4 net/bluetooth/l2cap_core.c:7280
Read of size 4 at addr deacfffffffffc8c by task kworker/u9:3/6431

CPU: 1 UID: 0 PID: 6431 Comm: kworker/u9:3 Not tainted 6.13.0-rc3-syzkaller-g573067a5a685 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: hci2 hci_rx_work
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120
 print_report+0xf8/0x538 mm/kasan/report.c:492
 kasan_report+0xd8/0x138 mm/kasan/report.c:602
 kasan_check_range+0x268/0x2a8 mm/kasan/generic.c:189
 __kasan_check_read+0x20/0x30 mm/kasan/shadow.c:31
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 l2cap_chan_lock include/net/bluetooth/l2cap.h:827 [inline]
 l2cap_conn_ready net/bluetooth/l2cap_core.c:1621 [inline]
 l2cap_connect_cfm+0x538/0xde4 net/bluetooth/l2cap_core.c:7280
 hci_connect_cfm+0x120/0x1d4 include/net/bluetooth/hci_core.h:2057
 le_conn_complete_evt+0xa24/0xf14 net/bluetooth/hci_event.c:5763
 hci_le_conn_complete_evt+0x114/0x404 net/bluetooth/hci_event.c:5789
 hci_le_meta_evt+0x2a4/0x478 net/bluetooth/hci_event.c:7162
 hci_event_func net/bluetooth/hci_event.c:7470 [inline]
 hci_event_packet+0x890/0x106c net/bluetooth/hci_event.c:7525
 hci_rx_work+0x31c/0xb04 net/bluetooth/hci_core.c:4035
 process_one_work+0x7a8/0x15cc kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x97c/0xeec kernel/workqueue.c:3391
 kthread+0x288/0x310 kernel/kthread.c:389
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862
==================================================================
Unable to handle kernel paging request at virtual address fbd51fffffffff91
KASAN: maybe wild-memory-access in range [0xdeacfffffffffc88-0xdeacfffffffffc8f]
Mem abort info:
  ESR = 0x0000000096000004
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x04: level 0 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[fbd51fffffffff91] address between user and kernel address ranges
Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 UID: 0 PID: 6431 Comm: kworker/u9:3 Tainted: G    B              6.13.0-rc3-syzkaller-g573067a5a685 #0
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: hci2 hci_rx_work
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
pc : atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline]
pc : l2cap_chan_lock include/net/bluetooth/l2cap.h:827 [inline]
pc : l2cap_conn_ready net/bluetooth/l2cap_core.c:1621 [inline]
pc : l2cap_connect_cfm+0x53c/0xde4 net/bluetooth/l2cap_core.c:7280
lr : instrument_atomic_read include/linux/instrumented.h:68 [inline]
lr : atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
lr : l2cap_chan_lock include/net/bluetooth/l2cap.h:827 [inline]
lr : l2cap_conn_ready net/bluetooth/l2cap_core.c:1621 [inline]
lr : l2cap_connect_cfm+0x538/0xde4 net/bluetooth/l2cap_core.c:7280
sp : ffff8000a1e974e0
x29: ffff8000a1e97580 x28: ffff0000cf96b000 x27: 1fffe0001e447e03
x26: dfff800000000000 x25: ffff0000cf96b4b0 x24: ffff0000f223f01a
x23: dead000000000100 x22: ffff0000f223f2c0 x21: 1fffe0001ad1f807
x20: ffff0000d68fc03d x19: deacfffffffffc8c x18: 1fffe00036700a7e
x17: ffff80008f99d000 x16: ffff80008b6a0244 x15: 0000000000000001
x14: 1ffff000125d8af0 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000100000 x10: 000000000001ea7e x9 : 0000000000000000
x8 : 1bd59fffffffff91 x7 : 1fffe00036700a7f x6 : ffff8000803cf9cc
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000802f5550
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline] (P)
 atomic_read include/linux/atomic/atomic-instrumented.h:33 [inline] (P)
 l2cap_chan_lock include/net/bluetooth/l2cap.h:827 [inline] (P)
 l2cap_conn_ready net/bluetooth/l2cap_core.c:1621 [inline] (P)
 l2cap_connect_cfm+0x53c/0xde4 net/bluetooth/l2cap_core.c:7280 (P)
 hci_connect_cfm+0x120/0x1d4 include/net/bluetooth/hci_core.h:2057
 le_conn_complete_evt+0xa24/0xf14 net/bluetooth/hci_event.c:5763
 hci_le_conn_complete_evt+0x114/0x404 net/bluetooth/hci_event.c:5789
 hci_le_meta_evt+0x2a4/0x478 net/bluetooth/hci_event.c:7162
 hci_event_func net/bluetooth/hci_event.c:7470 [inline]
 hci_event_packet+0x890/0x106c net/bluetooth/hci_event.c:7525
 hci_rx_work+0x31c/0xb04 net/bluetooth/hci_core.c:4035
 process_one_work+0x7a8/0x15cc kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x97c/0xeec kernel/workqueue.c:3391
 kthread+0x288/0x310 kernel/kthread.c:389
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862
Code: 52800081 aa1303e0 975a8e9c d343fe68 (38fa6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	52800081 	mov	w1, #0x4                   	// #4
   4:	aa1303e0 	mov	x0, x19
   8:	975a8e9c 	bl	0xfffffffffd6a3a78
   c:	d343fe68 	lsr	x8, x19, #3
* 10:	38fa6908 	ldrsb	w8, [x8, x26] <-- trapping instruction