syzbot

 __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+0x64/0x218 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Unable to handle kernel paging request at virtual address dfff800000000002
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
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
[dfff800000000002] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4226 Comm: syz-executor439 Not tainted 6.1.75-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : is_rec_inuse fs/ntfs3/ntfs.h:313 [inline]
pc : ni_write_inode+0x178/0xfb8 fs/ntfs3/frecord.c:3258
lr : ni_write_inode+0x144/0xfb8 fs/ntfs3/frecord.c:3252
sp : ffff80001dcf7680
x29: ffff80001dcf7790 x28: 1fffe0001b22740a x27: ffff0000d913a050
x26: ffff80001dcf7700 x25: 0000000000000016 x24: ffff0000e285e000
x23: 0000000000000000 x22: dfff800000000000 x21: ffff0000d913a000
x20: ffff0000e285e230 x19: ffff700003b9eedc x18: ffff80001dcf6cc0
x17: 0000000000000000 x16: ffff80001214cffc x15: 0000000000000000
x14: 1ffff00002b060b0 x13: dfff800000000000 x12: 00000000e131f0d8
x11: 0000000000ff0100 x10: 0000000000000000 x9 : ffff0000e285dfe0
x8 : 0000000000000002 x7 : ffff800009684c60 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000125b3fa0
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 is_rec_inuse fs/ntfs3/ntfs.h:313 [inline]
 ni_write_inode+0x178/0xfb8 fs/ntfs3/frecord.c:3258
 ntfs_evict_inode+0x70/0xc8 fs/ntfs3/inode.c:1765
 evict+0x260/0x68c fs/inode.c:666
 iput_final fs/inode.c:1791 [inline]
 iput+0x7c0/0x8a4 fs/inode.c:1817
 ntfs_new_inode+0x98/0x110 fs/ntfs3/fsntfs.c:1653
 ntfs_create_inode+0x3dc/0x2a10 fs/ntfs3/inode.c:1301
 ntfs_symlink+0x5c/0x7c fs/ntfs3/namei.c:200
 vfs_symlink+0x244/0x3a8 fs/namei.c:4479
 do_symlinkat+0x1bc/0x45c fs/namei.c:4508
 __do_sys_symlinkat fs/namei.c:4525 [inline]
 __se_sys_symlinkat fs/namei.c:4522 [inline]
 __arm64_sys_symlinkat+0xa4/0xbc fs/namei.c:4522
 __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+0x64/0x218 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: d1094289 91005919 f9001fe9 d343ff28 (38f66908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	d1094289 	sub	x9, x20, #0x250
   4:	91005919 	add	x25, x8, #0x16
   8:	f9001fe9 	str	x9, [sp, #56]
   c:	d343ff28 	lsr	x8, x25, #3
* 10:	38f66908 	ldrsb	w8, [x8, x22] <-- trapping instruction