[v6.1] UBSAN: shift-out-of-bounds in ntfs_read_inode_mount

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Jun 11, 2023, 1:24:51 AM6/11/23
to syzkaller...@googlegroups.com
Hello,

syzbot found the following issue on:

HEAD commit: 2f3918bc53fb Linux 6.1.33
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1055713b280000
kernel config: https://syzkaller.appspot.com/x/.config?x=64e29382e385f1b9
dashboard link: https://syzkaller.appspot.com/bug?extid=829c889049ba1049584c
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1109e263280000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12e78475280000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f180a77b248f/disk-2f3918bc.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/582d3206652e/vmlinux-2f3918bc.xz
kernel image: https://storage.googleapis.com/syzbot-assets/20934119e0f6/Image-2f3918bc.gz.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/22b99c35d4b2/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+829c88...@syzkaller.appspotmail.com

ntfs: (device loop0): parse_options(): Option utf8 is no longer supported, using option nls=utf8. Please use option nls=utf8 in the future and make sure utf8 is compiled either as a module or into the kernel.
================================================================================
UBSAN: shift-out-of-bounds in fs/ntfs/inode.c:1080:43
shift exponent 267 is too large for 32-bit type 'unsigned int'
CPU: 0 PID: 4216 Comm: syz-executor174 Not tainted 6.1.33-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Call trace:
dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
dump_stack+0x1c/0x58 lib/dump_stack.c:113
ubsan_epilogue lib/ubsan.c:151 [inline]
__ubsan_handle_shift_out_of_bounds+0x2f4/0x36c lib/ubsan.c:321
ntfs_read_locked_inode+0x35b4/0x38e0 fs/ntfs/inode.c:1080
ntfs_read_inode_mount+0xbb0/0x2044 fs/ntfs/inode.c:2098
ntfs_fill_super+0x13b4/0x2314 fs/ntfs/super.c:2855
mount_bdev+0x274/0x370 fs/super.c:1423
ntfs_mount+0x44/0x58 fs/ntfs/super.c:3049
legacy_get_tree+0xd4/0x16c fs/fs_context.c:610
vfs_get_tree+0x90/0x274 fs/super.c:1553
do_new_mount+0x25c/0x8c4 fs/namespace.c:3040
path_mount+0x590/0xe58 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+0x45c/0x594 fs/namespace.c:3568
__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:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
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:581
================================================================================
================================================================================
UBSAN: shift-out-of-bounds in fs/ntfs/inode.c:1089:11
shift exponent 255 is too large for 32-bit type 'unsigned int'
CPU: 0 PID: 4216 Comm: syz-executor174 Not tainted 6.1.33-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Call trace:
dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
dump_stack+0x1c/0x58 lib/dump_stack.c:113
ubsan_epilogue lib/ubsan.c:151 [inline]
__ubsan_handle_shift_out_of_bounds+0x2f4/0x36c lib/ubsan.c:321
ntfs_read_locked_inode+0x35d0/0x38e0 fs/ntfs/inode.c:1089
ntfs_read_inode_mount+0xbb0/0x2044 fs/ntfs/inode.c:2098
ntfs_fill_super+0x13b4/0x2314 fs/ntfs/super.c:2855
mount_bdev+0x274/0x370 fs/super.c:1423
ntfs_mount+0x44/0x58 fs/ntfs/super.c:3049
legacy_get_tree+0xd4/0x16c fs/fs_context.c:610
vfs_get_tree+0x90/0x274 fs/super.c:1553
do_new_mount+0x25c/0x8c4 fs/namespace.c:3040
path_mount+0x590/0xe58 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+0x45c/0x594 fs/namespace.c:3568
__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:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
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:581
================================================================================
ntfs: (device loop0): check_mft_mirror(): $MFT and $MFTMirr (record 0) do not match. Run ntfsfix or chkdsk.
ntfs: (device loop0): load_system_files(): $MFTMirr does not match $MFT. Mounting read-only. Run ntfsfix and/or chkdsk.
ntfs: (device loop0): map_mft_record(): Failed with error code 13.
ntfs: (device loop0): ntfs_read_locked_inode(): Failed with error code -13. Marking corrupt inode 0xa as bad. Run chkdsk.
ntfs: (device loop0): load_and_init_upcase(): Failed to load $UpCase from the volume. Using default.
ntfs: (device loop0): map_mft_record(): Failed with error code 13.
ntfs: (device loop0): ntfs_read_locked_inode(): Failed with error code -13. Marking corrupt inode 0x4 as bad. Run chkdsk.
ntfs: (device loop0): load_and_init_attrdef(): Failed to initialize attribute definition table.
ntfs: (device loop0): ntfs_fill_super(): Failed to load system files.


---
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