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=000000010c07e000
[0000000000000000] pgd=080000012b51b003, p4d=080000012b51b003, pud=080000012b51e003, pmd=0000000000000000
Internal error: Oops: 0000000086000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4150 Comm: syz.2.7 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : 0x0
lr : set_page_dirty+0x23c/0x4f0 mm/page-writeback.c:2631
sp : ffff80001fd07ad0
x29: ffff80001fd07ad0 x28: 0000000000000000 x27: 0000000000000020
x26: 0000000000000000 x25: 1fffff80006f9d71 x24: dfff800000000000
x23: 0000000000000000 x22: 05ffc00000000007 x21: ffff0000eb05f318
x20: ffff800011609ef8 x19: fffffc00037ceb80 x18: 0000000000000000
x17: ffff800016d04000 x16: ffff8000111bc798 x15: ffff8000088cefcc
x14: ffff8000088ceae8 x13: 1ffff0000282e06b x12: 0000000000080000
x11: 0000000000002d1b x10: ffff8000241aa000 x9 : ffff80000868ea8c
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 000000000000003f
x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff8000094d2858
x2 : 0000000000000001 x1 : 0000000000000000 x0 : fffffc00037ceb80
Call trace:
 0x0
 ntfs_sparse_cluster+0x6e0/0x870 fs/ntfs3/file.c:337
 ntfs_fallocate+0x5d8/0xa68 fs/ntfs3/file.c:704
 vfs_fallocate+0x4a4/0x5f4 fs/open.c:308
 ksys_fallocate fs/open.c:331 [inline]
 __do_sys_fallocate fs/open.c:339 [inline]
 __se_sys_fallocate fs/open.c:337 [inline]
 __arm64_sys_fallocate+0xc0/0x110 fs/open.c:337
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: bad PC value
---[ end trace adc23e1f532b673d ]---