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Date:   Mon, 03 Apr 2023 06:03:46 -0700
Message-ID: <0000000000007301c505f86e3072@google.com>
Subject: [syzbot] [ntfs3?] UBSAN: shift-out-of-bounds in attr_set_size
From:   syzbot <syzbot+14a2433710a3affee84e@syzkaller.appspotmail.com>
To:     almaz.alexandrovich@paragon-software.com,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        ntfs3@lists.linux.dev, syzkaller-bugs@googlegroups.com
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Hello,

syzbot found the following issue on:

HEAD commit:    7e364e56293b Linux 6.3-rc5
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13a94395c80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d9a438ce47536f0c
dashboard link: https://syzkaller.appspot.com/bug?extid=14a2433710a3affee84e
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/54c56bddacf4/disk-7e364e56.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/447e5d1af596/vmlinux-7e364e56.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3e2d1545e7be/bzImage-7e364e56.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+14a2433710a3affee84e@syzkaller.appspotmail.com

================================================================================
UBSAN: shift-out-of-bounds in fs/ntfs3/attrib.c:450:9
shift exponent 64 is too large for 32-bit type 'u32' (aka 'unsigned int')
CPU: 1 PID: 1832 Comm: syz-executor.1 Not tainted 6.3.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
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
 attr_set_size+0x32c2/0x4290 fs/ntfs3/attrib.c:450
 ntfs_extend_mft+0x188/0x4b0 fs/ntfs3/fsntfs.c:511
 ntfs_look_free_mft+0x43d/0x10b0 fs/ntfs3/fsntfs.c:589
 ntfs_create_inode+0x4d7/0x3830 fs/ntfs3/inode.c:1296
 ntfs_atomic_open+0x3db/0x530 fs/ntfs3/namei.c:424
 atomic_open fs/namei.c:3279 [inline]
 lookup_open fs/namei.c:3387 [inline]
 open_last_lookups fs/namei.c:3484 [inline]
 path_openat+0x103c/0x3170 fs/namei.c:3712
 do_filp_open+0x234/0x490 fs/namei.c:3742
 do_sys_openat2+0x13f/0x500 fs/open.c:1348
 do_sys_open fs/open.c:1364 [inline]
 __do_sys_open fs/open.c:1372 [inline]
 __se_sys_open fs/open.c:1368 [inline]
 __x64_sys_open+0x225/0x270 fs/open.c:1368
 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: 0033:0x7f99f548c0f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f99f622e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f99f55abf80 RCX: 00007f99f548c0f9
RDX: 0000000000000000 RSI: 0000000000060142 RDI: 0000000020000000
RBP: 00007f99f54e7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd74d2bccf R14: 00007f99f622e300 R15: 0000000000022000
 </TASK>
================================================================================


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