Hello, syzbot found the following issue on: HEAD commit: a6b443748715 Merge branch 'for-next/core', remote-tracking.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=16271d4f080000 kernel config: https://syzkaller.appspot.com/x/.config?x=e79d82586727c5df dashboard link: https://syzkaller.appspot.com/bug?extid=29dc75ed37be943c610e compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=162474a7080000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=119b6b78880000 Downloadable assets: disk image: https://storage.googleapis.com/1436897f0dc0/disk-a6b44374.raw.xz vmlinux: https://storage.googleapis.com/68c4de151fbb/vmlinux-a6b44374.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+29dc75ed37be943c610e@xxxxxxxxxxxxxxxxxxxxxxxxx ntfs3: loop0: Different NTFS' sector size (1024) and media sector size (512) ntfs3: loop0: RAW NTFS volume: Filesystem size 0.00 Gb > volume size 0.00 Gb. Mount in read-only ntfs3: loop0: Failed to load $Extend. Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008 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 user pgtable: 4k pages, 48-bit VAs, pgdp=0000000109094000 [0000000000000008] pgd=080000010aed9003, p4d=080000010aed9003, pud=080000010738d003, pmd=0000000000000000 Internal error: Oops: 96000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 3027 Comm: syz-executor119 Not tainted 6.0.0-rc4-syzkaller-17255-ga6b443748715 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : d_flags_for_inode fs/dcache.c:1980 [inline] pc : __d_instantiate+0x2a0/0x2e4 fs/dcache.c:1998 lr : d_flags_for_inode fs/dcache.c:1979 [inline] lr : __d_instantiate+0x80/0x2e4 fs/dcache.c:1998 sp : ffff8000126f3ac0 x29: ffff8000126f3ac0 x28: 0000000040000000 x27: ffff0000cd3a0000 x26: ffff80000cf0e000 x25: fffffc0000000000 x24: 000000000001f000 x23: ffff0000cd3a0000 x22: 0000000000000008 x21: 0000000000000000 x20: ffff0000ca50ce48 x19: ffff0000c7732750 x18: 00000000000000c0 x17: ffff80000dd3a698 x16: ffff80000db78658 x15: ffff0000c4f13500 x14: 00000000000000b8 x13: 00000000ffffffff x12: ffff0000c4f13500 x11: ff808000085e2a88 x10: 0000000000000000 x9 : ffff0000c4f13500 x8 : 0000000000000000 x7 : ffff8000085e2e0c x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: d_flags_for_inode fs/dcache.c:1980 [inline] __d_instantiate+0x2a0/0x2e4 fs/dcache.c:1998 d_instantiate fs/dcache.c:2036 [inline] d_make_root+0x64/0xa8 fs/dcache.c:2071 ntfs_fill_super+0x1420/0x14a4 fs/ntfs/super.c:180 get_tree_bdev+0x1e8/0x2a0 fs/super.c:1323 ntfs_fs_get_tree+0x28/0x38 fs/ntfs3/super.c:1358 vfs_get_tree+0x40/0x140 fs/super.c:1530 do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040 path_mount+0x358/0x914 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x2f8/0x408 fs/namespace.c:3568 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 Code: 79000688 52a00417 17ffff83 f9401288 (f9400508) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 79000688 strh w8, [x20, #2] 4: 52a00417 mov w23, #0x200000 // #2097152 8: 17ffff83 b 0xfffffffffffffe14 c: f9401288 ldr x8, [x20, #32] * 10: f9400508 ldr x8, [x8, #8] <-- trapping instruction --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
