syzbot

loop0: detected capacity change from 0 to 4096
ntfs3: loop0: Different NTFS' sector size (2048) and media sector size (512)
ntfs3: loop0: Mark volume as dirty due to NTFS errors
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
Mem abort info:
  ESR = 0x0000000086000006
  EC = 0x21: IABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
user pgtable: 4k pages, 48-bit VAs, pgdp=000000010e10f000
[0000000000000000] pgd=0800000104bed003, p4d=0800000104bed003, pud=080000010f6bd003, pmd=0000000000000000
Internal error: Oops: 0000000086000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4221 Comm: syz-executor437 Not tainted 6.1.79-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : 0x0
lr : folio_mark_dirty+0x118/0x198 mm/page-writeback.c:2749
sp : ffff80001dc07640
x29: ffff80001dc07640 x28: 0000000000000000 x27: 0000000000000800
x26: 0000000000000000 x25: fffffc0003897f48 x24: 05ffd00000000057
x23: 1fffff8000712fe9 x22: dfff800000000000 x21: ffff8000125b3558
x20: ffff0000df3df318 x19: fffffc0003897f40 x18: ffff80001dc07160
x17: 0004060000000014 x16: ffff8000120a8840 x15: 0000000000000000
x14: 0000000000000406 x13: ffff0000d7640000 x12: 0000000000000000
x11: 0000000000ff0100 x10: 0000000000000000 x9 : ffff800008774fcc
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 000000000000003f
x5 : 0000000000000040 x4 : 0000000000000000 x3 : 0000000000000004
x2 : 0000000000000000 x1 : fffffc0003897f40 x0 : ffff0000df3df318
Call trace:
 0x0
 set_page_dirty+0x58/0x78 mm/folio-compat.c:62
 ntfs_sparse_cluster+0x6fc/0xa58 fs/ntfs3/file.c:335
 ntfs_fallocate+0x8b0/0xd88 fs/ntfs3/file.c:727
 vfs_fallocate+0x478/0x5b4 fs/open.c:323
 ioctl_preallocate+0x278/0x324 fs/ioctl.c:290
 do_vfs_ioctl+0x1ad8/0x26f8 fs/ioctl.c:849
 __do_sys_ioctl fs/ioctl.c:868 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:856
 __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: bad PC value
---[ end trace 0000000000000000 ]---