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=000000011d1ee000 [0000000000000000] pgd=080000010c3e4003, p4d=080000010c3e4003, pud=0800000103d93003, pmd=0000000000000000 Internal error: Oops: 0000000086000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4840 Comm: syz.2.160 Not tainted 6.1.97-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : 0x0 lr : folio_mark_dirty+0x118/0x198 mm/page-writeback.c:2749 sp : ffff80001e9e7640 x29: ffff80001e9e7640 x28: 0000000000000800 x27: 0000000000000800 x26: 0000000000000000 x25: fffffc0003be8d48 x24: 05ffd0000000205f x23: 1fffff800077d1a9 x22: dfff800000000000 x21: ffff8000125d5518 x20: ffff0000df998478 x19: fffffc0003be8d40 x18: ffff80001e9e72c0 x17: ffff8000188f0000 x16: ffff8000120bd380 x15: ffff8000183d5f80 x14: 1ffff00002b0c0b0 x13: dfff800000000000 x12: 0000000000040000 x11: 00000000000065a0 x10: ffff80002097a000 x9 : ffff800008776d08 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000000 x3 : 0000000000000004 x2 : 0000000000000000 x1 : fffffc0003be8d40 x0 : ffff0000df998478 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:140 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204 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 ]---