ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
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
Unable to handle kernel paging request at virtual address dfff80000000004c
KASAN: null-ptr-deref in range [0x0000000000000260-0x0000000000000267]
Mem abort info:
  ESR = 0x0000000096000005
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[dfff80000000004c] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 50 Comm: kworker/u9:0 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: hci2 hci_rx_work
pstate: 23400005 (nzCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : kasan_byte_accessible+0x10/0x20 mm/kasan/generic.c:210
lr : __kasan_check_byte+0x20/0x54 mm/kasan/common.c:573
sp : ffff80008fff7470
x29: ffff80008fff7470 x28: ffff8000888de000 x27: ffff0000c337d700
x26: 9ee5800084ab4f10 x25: 0000000000000000 x24: 0000000000000001
x23: 0000000000000000 x22: 0000000000000260 x21: 0000000000000260
x20: 0000000000000000 x19: ffff800084ab4f10 x18: 1fffe00035c20e20
x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000
x11: ffff80008a343d08 x10: 0000000000000003 x9 : dfff800000000000
x8 : 000000000000004c x7 : 0000000000000000 x6 : ffff800085a3bf38
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : ffff800084ab4f10 x0 : 0000000000000260
Call trace:
 kasan_mem_to_shadow include/linux/kasan.h:65 [inline] (P)
 kasan_byte_accessible+0x10/0x20 mm/kasan/generic.c:210 (P)
 kasan_check_byte include/linux/kasan.h:402 [inline]
 lock_acquire+0xa4/0x368 kernel/locking/lockdep.c:5842
 lock_sock_nested+0x58/0x110 net/core/sock.c:3783
 lock_sock include/net/sock.h:1713 [inline]
 l2cap_sock_new_connection_cb+0x54/0x1fc net/bluetooth/l2cap_sock.c:1501
 l2cap_connect_cfm+0x2d8/0xb94 net/bluetooth/l2cap_core.c:7410
 hci_connect_cfm+0x98/0x134 include/net/bluetooth/hci_core.h:2139
 le_conn_complete_evt+0xc78/0x109c net/bluetooth/hci_event.c:5865
 hci_le_conn_complete_evt+0x114/0x40c net/bluetooth/hci_event.c:5891
 hci_le_meta_evt+0x2d4/0x49c net/bluetooth/hci_event.c:7506
 hci_event_func net/bluetooth/hci_event.c:7770 [inline]
 hci_event_packet+0x4e4/0xa00 net/bluetooth/hci_event.c:7824
 hci_rx_work+0x2fc/0xd1c net/bluetooth/hci_core.c:4077
 process_one_work+0x78c/0x173c kernel/workqueue.c:3302
 process_scheduled_works+0xdc/0x13c kernel/workqueue.c:3385
 worker_thread+0x770/0xbd0 kernel/workqueue.c:3466
 kthread+0x2f0/0x3c0 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
Code: d503245f d343fc08 d2d00009 f2fbffe9 (38696908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	d503245f 	bti	c
   4:	d343fc08 	lsr	x8, x0, #3
   8:	d2d00009 	mov	x9, #0x800000000000        	// #140737488355328
   c:	f2fbffe9 	movk	x9, #0xdfff, lsl #48
* 10:	38696908 	ldrb	w8, [x8, x9] <-- trapping instruction