syzbot

loop0: detected capacity change from 0 to 4096
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008
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
user pgtable: 4k pages, 48-bit VAs, pgdp=000000010d11c000
[0000000000000008] pgd=080000010d116003, p4d=080000010d116003, pud=080000010b3b6003, pmd=0000000000000000
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 3072 Comm: syz-executor354 Not tainted 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : d_flags_for_inode fs/dcache.c:1980 [inline]
pc : __d_instantiate+0x2a0/0x2e4 fs/dcache.c:1998
lr : d_flags_for_inode fs/dcache.c:1979 [inline]
lr : __d_instantiate+0x80/0x2e4 fs/dcache.c:1998
sp : ffff800012f4bac0
x29: ffff800012f4bac0 x28: 0000000040000000 x27: ffff0000cd0a0000
x26: ffff80000cf6e000 x25: fffffc0000000000 x24: 000000000001f000
x23: ffff0000cd0a0000 x22: 0000000000000008 x21: 0000000000000000
x20: ffff0000c05a5530 x19: ffff0000c9f48138 x18: 000000000000ba7e
x17: 000000000000b67e x16: ffff80000dbe6158 x15: ffff0000c434b480
x14: 00000000000000b8 x13: 00000000ffffffff x12: ffff0000c434b480
x11: ff808000085f41e4 x10: 0000000000000000 x9 : ffff0000c434b480
x8 : 0000000000000000 x7 : ffff8000085f4568 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 d_flags_for_inode fs/dcache.c:1980 [inline]
 __d_instantiate+0x2a0/0x2e4 fs/dcache.c:1998
 d_instantiate fs/dcache.c:2036 [inline]
 d_make_root+0x64/0xa8 fs/dcache.c:2071
 ntfs_fill_super+0x1420/0x14a4 fs/ntfs3/super.c:1269
 get_tree_bdev+0x1e8/0x2a0 fs/super.c:1324
 ntfs_fs_get_tree+0x28/0x38 fs/ntfs3/super.c:1358
 vfs_get_tree+0x40/0x140 fs/super.c:1531
 do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040
 path_mount+0x358/0x890 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __arm64_sys_mount+0x2c4/0x3c4 fs/namespace.c:3568
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
 el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x48/0x140 arch/arm64/kernel/syscall.c:197
 el0_svc+0x58/0x150 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:584
Code: 79000688 52a00417 17ffff83 f9401288 (f9400508) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	79000688 	strh	w8, [x20, #2]
   4:	52a00417 	mov	w23, #0x200000              	// #2097152
   8:	17ffff83 	b	0xfffffffffffffe14
   c:	f9401288 	ldr	x8, [x20, #32]
* 10:	f9400508 	ldr	x8, [x8, #8] <-- trapping instruction