Unable to handle kernel paging request at virtual address dfff80000000003a
KASAN: null-ptr-deref in range [0x00000000000001d0-0x00000000000001d7]
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
[dfff80000000003a] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 1 UID: 0 PID: 6818 Comm: syz-executor.0 Not tainted 6.15.0-rc7-syzkaller-00085-gd7fa1af5b33e #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : kasan_byte_accessible+0x10/0x20 mm/kasan/generic.c:199
lr : __kasan_check_byte+0x20/0x54 mm/kasan/common.c:556
sp : ffff80009eac79b0
x29: ffff80009eac79b0 x28: ffff80008f321000 x27: ffff0000c8875b80
x26: ffff80008add2d48 x25: 0000000000000000 x24: 0000000000000001
x23: 0000000000000001 x22: 00000000000001d0 x21: 00000000000001d0
x20: 0000000000000000 x19: ffff80008add2d48 x18: 0000000000000000
x17: 0000000000000000 x16: ffff80008adbe9e4 x15: 0000000000000005
x14: 1ffff00013d58f88 x13: 0000000000000000 x12: 0000000000000000
x11: ffff700013d58f8d x10: 0000000000000003 x9 : dfff800000000000
x8 : 000000000000003a x7 : 0000000000000000 x6 : ffff800080f1c834
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000000 x1 : ffff80008add2d48 x0 : 00000000000001d0
Call trace:
 kasan_mem_to_shadow include/linux/kasan.h:64 [inline] (P)
 kasan_byte_accessible+0x10/0x20 mm/kasan/generic.c:199 (P)
 kasan_check_byte include/linux/kasan.h:399 [inline]
 lock_acquire+0xb0/0x2e0 kernel/locking/lockdep.c:5840
 down_read_killable+0x60/0x32c kernel/locking/rwsem.c:1547
 mmap_read_lock_killable include/linux/mmap_lock.h:193 [inline]
 do_pagemap_scan fs/proc/task_mmu.c:2787 [inline]
 do_pagemap_cmd+0x44c/0xa5c fs/proc/task_mmu.c:2840
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl fs/ioctl.c:892 [inline]
 __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:892
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
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