linux-kernel - [syzbot] [ntfs3?] WARNING in ntfs_extend_initialized

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Message-ID: <6701c108.050a0220.49194.04ca.GAE@google.com>
Date: Sat, 05 Oct 2024 15:43:20 -0700
From: syzbot <syzbot+e37dd1dfc814b10caa55@...kaller.appspotmail.com>
To: almaz.alexandrovich@...agon-software.com, linux-kernel@...r.kernel.org, 
	ntfs3@...ts.linux.dev, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [ntfs3?] WARNING in ntfs_extend_initialized_size

Hello,

syzbot found the following issue on:

HEAD commit:    e32cde8d2bd7 Merge tag 'sched_ext-for-6.12-rc1-fixes-1' of..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1201939f980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1f009dd80b3799c2
dashboard link: https://syzkaller.appspot.com/bug?extid=e37dd1dfc814b10caa55
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15c8e927980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13b7bdd0580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/08f3ba449e03/disk-e32cde8d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/17bcace1ab90/vmlinux-e32cde8d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/da9183ac0145/bzImage-e32cde8d.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/0e40cc89da55/mount_0.gz

Bisection is inconclusive: the first bad commit could be any of:

220cf0498bbf fs/ntfs3: Simplify initialization of $AttrDef and $UpCase
2c2814d0dafc fs/ntfs3: Use macros NTFS_LABEL_MAX_LENGTH instead of hardcoded value

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=138b539f980000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e37dd1dfc814b10caa55@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 5234 at fs/ntfs3/file.c:181 ntfs_extend_initialized_size+0x907/0x950 fs/ntfs3/file.c:181
Modules linked in:
CPU: 1 UID: 0 PID: 5234 Comm: syz-executor337 Not tainted 6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:ntfs_extend_initialized_size+0x907/0x950 fs/ntfs3/file.c:181
Code: 66 89 d8 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 58 72 a7 fe 90 0f 0b 90 e9 ba f8 ff ff e8 4a 72 a7 fe 90 <0f> 0b 90 e9 cf f8 ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 5a
RSP: 0018:ffffc90002eaf580 EFLAGS: 00010293
RAX: ffffffff82ed6916 RBX: 000000000000b5b3 RCX: ffff888029a61e00
RDX: 0000000000000000 RSI: 000000000000b5b3 RDI: 0000000000050000
RBP: ffffc90002eaf6b0 R08: ffffffff82ed61e0 R09: 1ffffffff2037745
R10: dffffc0000000000 R11: fffffbfff2037746 R12: ffff88802db18000
R13: dffffc0000000000 R14: 0000000000050000 R15: 0000000000000000
FS:  00007f62c31fa6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffee48b8dd8 CR3: 0000000076342000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ntfs_file_mmap+0x5f2/0x850 fs/ntfs3/file.c:368
 call_mmap include/linux/fs.h:2172 [inline]
 mmap_region+0x1add/0x2990 mm/mmap.c:1440
 do_mmap+0x8f0/0x1000 mm/mmap.c:496
 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588
 ksys_mmap_pgoff+0x4eb/0x720 mm/mmap.c:542
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f62c32646b9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 18 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f62c31fa208 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f62c330a658 RCX: 00007f62c32646b9
RDX: 00000000017ffff7 RSI: 0000000000600000 RDI: 0000000020000000
RBP: 00007f62c330a650 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000004002011 R11: 0000000000000246 R12: 00007f62c32d78c4
R13: 00007f62c32b80c0 R14: 007570637265705f R15: 0700000000000000
 </TASK>


---
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@...glegroups.com.

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For information about bisection process see: https://goo.gl/tpsmEJ#bisection

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
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If you want to overwrite report's subsystems, reply with:
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(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup