netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. Unable to handle kernel paging request at virtual address dfff800000000004 KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [dfff800000000004] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 7039 Comm: syz-executor.4 Not tainted 6.9.0-rc4-syzkaller-g6a71d2909427 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 pstate: 80401005 (Nzcv daif +PAN -UAO -TCO -DIT +SSBS BTYPE=--) pc : attr_data_read_resident+0xb0/0x6b0 fs/ntfs3/attrib.c:1239 lr : attr_data_read_resident+0x8c/0x6b0 fs/ntfs3/attrib.c:1236 sp : ffff8000a0097500 x29: ffff8000a0097500 x28: 1ffff00014012ec4 x27: ffff8000a0097620 x26: dfff800000000000 x25: ffff8000a0097610 x24: dfff800000000000 x23: ffff0000f43bd120 x22: 1ffff00014012ec2 x21: 0000000000000020 x20: ffff0000c8a0e108 x19: 0000000000000000 x18: ffff8000a0097040 x17: 000000000002a896 x16: ffff8000802896e4 x15: 0000000000000001 x14: 0000000000000002 x13: 0000000000000001 x12: ffff0000c4e18000 x11: 0000000000040000 x10: 0000000000ff0100 x9 : 0000000000000002 x8 : 0000000000000004 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000080 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: attr_data_read_resident+0xb0/0x6b0 fs/ntfs3/attrib.c:1239 ntfs_get_block_vbo+0x2b0/0xc18 fs/ntfs3/inode.c:574 ntfs_get_block_bmap+0xa0/0xe0 fs/ntfs3/inode.c:689 generic_block_bmap+0x11c/0x1bc fs/buffer.c:2744 ntfs_bmap+0x30/0x40 fs/ntfs3/inode.c:696 bmap+0xa8/0xe8 fs/inode.c:1792 ioctl_fibmap fs/ioctl.c:77 [inline] file_ioctl fs/ioctl.c:328 [inline] do_vfs_ioctl+0x21d0/0x2ab0 fs/ioctl.c:883 __do_sys_ioctl fs/ioctl.c:902 [inline] __se_sys_ioctl fs/ioctl.c:890 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:890 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Code: 128002a0 14000120 91008275 d343fea8 (38786908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 128002a0 mov w0, #0xffffffea // #-22 4: 14000120 b 0x484 8: 91008275 add x21, x19, #0x20 c: d343fea8 lsr x8, x21, #3 * 10: 38786908 ldrb w8, [x8, x24] <-- trapping instruction