[syzbot] [ntfs?] UBSAN: shift-out-of-bounds in ntfs_read_inode_mount

From: syzbot
Date: Fri Mar 03 2023 - 12:37:01 EST


Hello,

syzbot found the following issue on:

HEAD commit: 04a357b1f6f0 Merge tag 'mips_6.3_1' of git://git.kernel.or..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=144617acc80000
kernel config: https://syzkaller.appspot.com/x/.config?x=f763d89e26d3d4c4
dashboard link: https://syzkaller.appspot.com/bug?extid=c601e38d15ce8253186a
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3e9f8326ebe2/disk-04a357b1.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/138ae11c9b96/vmlinux-04a357b1.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d0594947835d/bzImage-04a357b1.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c601e38d15ce8253186a@xxxxxxxxxxxxxxxxxxxxxxxxx

loop1: detected capacity change from 0 to 4096
================================================================================
UBSAN: shift-out-of-bounds in fs/ntfs/inode.c:1080:43
shift exponent 48 is too large for 32-bit type 'unsigned int'
CPU: 0 PID: 2557 Comm: syz-executor.1 Not tainted 6.2.0-syzkaller-13163-g04a357b1f6f0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
ubsan_epilogue lib/ubsan.c:217 [inline]
__ubsan_handle_shift_out_of_bounds+0x3c3/0x420 lib/ubsan.c:387
ntfs_read_locked_inode+0x4665/0x49c0 fs/ntfs/inode.c:1080
ntfs_read_inode_mount+0xda6/0x2660 fs/ntfs/inode.c:2098
ntfs_fill_super+0x1884/0x2bd0 fs/ntfs/super.c:2863
mount_bdev+0x271/0x3a0 fs/super.c:1371
legacy_get_tree+0xef/0x190 fs/fs_context.c:610
vfs_get_tree+0x8c/0x270 fs/super.c:1501
do_new_mount+0x28f/0xae0 fs/namespace.c:3042
do_mount fs/namespace.c:3385 [inline]
__do_sys_mount fs/namespace.c:3594 [inline]
__se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3571
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fee1468d62a
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fee1548af88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 000000000001f6d9 RCX: 00007fee1468d62a
RDX: 000000002001f6c0 RSI: 000000002001f640 RDI: 00007fee1548afe0
RBP: 00007fee1548b020 R08: 00007fee1548b020 R09: 000000000000870b
R10: 000000000000870b R11: 0000000000000202 R12: 000000002001f6c0
R13: 000000002001f640 R14: 00007fee1548afe0 R15: 0000000020000000
</TASK>
================================================================================


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