Unable to handle kernel paging request at virtual address dfff800000000000 KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] 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 [dfff800000000000] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4706 Comm: syz.3.65 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : PagePoisoned include/linux/page-flags.h:304 [inline] pc : PagePrivate include/linux/page-flags.h:511 [inline] pc : ntfs_prepare_pages_for_non_resident_write fs/ntfs/file.c:1328 [inline] pc : ntfs_perform_write+0x60bc/0x6a20 fs/ntfs/file.c:1844 lr : ntfs_prepare_pages_for_non_resident_write fs/ntfs/file.c:1348 [inline] lr : ntfs_perform_write+0x6454/0x6a20 fs/ntfs/file.c:1844 sp : ffff8000214775a0 x29: ffff8000214779b0 x28: dfff800000000000 x27: ffff0000dfdd91d0 x26: 0000000000000020 x25: 0000000000000001 x24: ffff0000dfdd91d0 x23: 0000000000000000 x22: fffffc0003f183a0 x21: 0000000000000000 x20: 0000000000000000 x19: 0000000000000001 x18: ffff800011a5bd40 x17: ffff800018184000 x16: ffff8000082d2558 x15: ffff800017c65000 x14: ffff0000d14fa658 x13: 1ffff00002a0a0b1 x12: 0000000000080000 x11: 0000000000003024 x10: ffff80002812d000 x9 : ffff800009538bbc x8 : 0000000000000000 x7 : ffff8000095358c4 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff800009535988 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: PagePoisoned include/linux/page-flags.h:304 [inline] PagePrivate include/linux/page-flags.h:511 [inline] ntfs_prepare_pages_for_non_resident_write fs/ntfs/file.c:1328 [inline] ntfs_perform_write+0x60bc/0x6a20 fs/ntfs/file.c:1844 ntfs_file_write_iter+0xf80/0x17e0 fs/ntfs/file.c:1917 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x5ac/0x7c4 fs/read_write.c:584 ksys_write+0x120/0x210 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:646 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 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: aa1503e0 97ce810d f94002b5 d343feb7 (387c6ae8) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: aa1503e0 mov x0, x21 4: 97ce810d bl 0xffffffffff3a0438 8: f94002b5 ldr x21, [x21] c: d343feb7 lsr x23, x21, #3 * 10: 387c6ae8 ldrb w8, [x23, x28] <-- trapping instruction