__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
Unable to handle kernel paging request at virtual address dfff800000000001
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006
  CM = 0, WnR = 0
[dfff800000000001] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 9423 Comm: syz-executor.3 Not tainted 6.3.0-rc7-syzkaller-g327bf9bb94cf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : _compound_head include/linux/page-flags.h:251 [inline]
pc : unlock_page+0x28/0x74 mm/folio-compat.c:21
lr : unlock_page+0x18/0x74 mm/folio-compat.c:20
sp : ffff80002c5671c0
x29: ffff80002c5671c0 x28: 0000000000000007 x27: 00000000fffffff4
x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000
x23: ffff0000d45b8808 x22: 0000000000000001 x21: dfff800000000000
x20: 0000000000000008 x19: 0000000000000000 x18: 1fffe000368519b6
x17: 0000000000000000 x16: ffff8000084f9a5c x15: 0000000000000001
x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000001
x11: 0000000000040000 x10: 000000000001b382 x9 : 0000000000000001
x8 : dfff800000000000 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80002c5663f8 x4 : ffff800015d5c8c0 x3 : ffff80000968ab9c
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 _compound_head include/linux/page-flags.h:251 [inline]
 unlock_page+0x28/0x74 mm/folio-compat.c:21
 ni_readpage_cmpr+0x474/0x798 fs/ntfs3/frecord.c:2149
 ntfs_read_folio+0x14c/0x1c0 fs/ntfs3/inode.c:703
 filemap_read_folio+0x14c/0x39c mm/filemap.c:2424
 filemap_fault+0xa58/0xf7c mm/filemap.c:3367
 __do_fault+0x11c/0x3d8 mm/memory.c:4155
 do_read_fault mm/memory.c:4506 [inline]
 do_fault mm/memory.c:4635 [inline]
 handle_pte_fault mm/memory.c:4923 [inline]
 __handle_mm_fault mm/memory.c:5065 [inline]
 handle_mm_fault+0x1f80/0x3dec mm/memory.c:5211
 __do_page_fault arch/arm64/mm/fault.c:512 [inline]
 do_page_fault+0x634/0xac4 arch/arm64/mm/fault.c:612
 do_translation_fault+0x94/0xc8 arch/arm64/mm/fault.c:695
 do_mem_abort+0x74/0x200 arch/arm64/mm/fault.c:831
 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:367
 el1h_64_sync_handler+0x60/0xac arch/arm64/kernel/entry-common.c:427
 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:586
 do_strncpy_from_user lib/strncpy_from_user.c:41 [inline]
 strncpy_from_user+0x224/0x54c lib/strncpy_from_user.c:139
 getname_flags+0x104/0x480 fs/namei.c:151
 getname+0x28/0x38 fs/namei.c:219
 do_sys_openat2+0xd4/0x3d8 fs/open.c:1342
 do_sys_open fs/open.c:1364 [inline]
 __do_sys_openat fs/open.c:1380 [inline]
 __se_sys_openat fs/open.c:1375 [inline]
 __arm64_sys_openat+0x1f0/0x240 fs/open.c:1375
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
Code: d2d00008 91002274 f2fbffe8 d343fe89 (38686928) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	d2d00008 	mov	x8, #0x800000000000        	// #140737488355328
   4:	91002274 	add	x20, x19, #0x8
   8:	f2fbffe8 	movk	x8, #0xdfff, lsl #48
   c:	d343fe89 	lsr	x9, x20, #3
* 10:	38686928 	ldrb	w8, [x9, x8] <-- trapping instruction