Message-ID: <000000000000feae34061fb17b73@google.com>
Date: Wed, 14 Aug 2024 21:43:30 -0700
From: syzbot <syzbot+7f3761b790fa41d0f3d5@...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 wnd_add_free_ext (3)

Hello,

syzbot found the following issue on:

HEAD commit:    5189dafa4cf9 Merge tag 'nfsd-6.11-1' of git://git.kernel.o..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13007ae5980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=9358cc4a2e37fd30
dashboard link: https://syzkaller.appspot.com/bug?extid=7f3761b790fa41d0f3d5
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=14997d23980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17fb6ced980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/430efe109c38/disk-5189dafa.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/01a4087208d1/vmlinux-5189dafa.xz
kernel image: https://storage.googleapis.com/syzbot-assets/82162927fd2c/bzImage-5189dafa.xz
mounted in repro #1: https://storage.googleapis.com/syzbot-assets/663048cdc587/mount_0.gz
mounted in repro #2: https://storage.googleapis.com/syzbot-assets/31fa56bb1564/mount_6.gz
mounted in repro #3: https://storage.googleapis.com/syzbot-assets/6bf53fa597f1/mount_7.gz
mounted in repro #4: https://storage.googleapis.com/syzbot-assets/19d8450427c7/mount_11.gz

The issue was bisected to:

commit 8335ebe195dcc76ece418485a9f08b9a9ad7fe23
Author: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Date:   Thu Jul 7 16:25:43 2022 +0000

    fs/ntfs3: Make MFT zone less fragmented

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15d4f2cb980000
final oops:     https://syzkaller.appspot.com/x/report.txt?x=17d4f2cb980000
console output: https://syzkaller.appspot.com/x/log.txt?x=13d4f2cb980000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7f3761b790fa41d0f3d5@...kaller.appspotmail.com
Fixes: 8335ebe195dc ("fs/ntfs3: Make MFT zone less fragmented")

------------[ cut here ]------------
WARNING: CPU: 0 PID: 5807 at fs/ntfs3/bitmap.c:217 rb_insert_start fs/ntfs3/bitmap.c:217 [inline]
WARNING: CPU: 0 PID: 5807 at fs/ntfs3/bitmap.c:217 wnd_add_free_ext+0xaba/0xd60 fs/ntfs3/bitmap.c:352
Modules linked in:
CPU: 0 UID: 0 PID: 5807 Comm: syz-executor351 Not tainted 6.11.0-rc2-syzkaller-00257-g5189dafa4cf9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:rb_insert_start fs/ntfs3/bitmap.c:217 [inline]
RIP: 0010:wnd_add_free_ext+0xaba/0xd60 fs/ntfs3/bitmap.c:352
Code: 00 fc ff df 80 3c 28 00 74 08 48 89 df e8 2e be 14 ff 48 8b 7c 24 08 48 89 3b 4c 89 f6 e8 fe 08 c3 08 eb 13 e8 a7 9c b0 fe 90 <0f> 0b 90 48 bd 00 00 00 00 00 fc ff df 48 8b 44 24 38 80 3c 28 00
RSP: 0018:ffffc90004587008 EFLAGS: 00010293
RAX: ffffffff82e2da99 RBX: 0000000000000603 RCX: ffff888022c4bc00
RDX: 0000000000000000 RSI: 0000000000000603 RDI: 0000000000000603
RBP: 0000000000000603 R08: ffffffff82e2d9d2 R09: 0000000000000000
R10: ffff888076ea21a8 R11: ffffed100edd4437 R12: ffff888076ea2120
R13: ffff888076ea2120 R14: ffff8880240322d8 R15: 1ffff1100edd4433
FS:  00007fbc4836d6c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbc4834cd58 CR3: 000000007b5dc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 wnd_zone_set+0xa6/0x160 fs/ntfs3/bitmap.c:1421
 mark_as_free_ex+0x30d/0x390
 run_deallocate_ex+0x244/0x5f0 fs/ntfs3/attrib.c:122
 attr_set_size+0x168d/0x4300 fs/ntfs3/attrib.c:753
 ntfs_truncate fs/ntfs3/file.c:459 [inline]
 ntfs3_setattr+0x7a4/0xb80 fs/ntfs3/file.c:775
 notify_change+0xb9d/0xe70 fs/attr.c:495
 do_truncate+0x220/0x310 fs/open.c:65
 handle_truncate fs/namei.c:3381 [inline]
 do_open fs/namei.c:3731 [inline]
 path_openat+0x2ced/0x3470 fs/namei.c:3886
 do_filp_open+0x235/0x490 fs/namei.c:3913
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1416
 do_sys_open fs/open.c:1431 [inline]
 __do_sys_openat fs/open.c:1447 [inline]
 __se_sys_openat fs/open.c:1442 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1442
 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: 0033:0x7fbc483e0e89
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 1d 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:00007fbc4836d218 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fbc48486718 RCX: 00007fbc483e0e89
RDX: 000000000000275a RSI: 0000000020001000 RDI: 00000000ffffff9c
RBP: 00007fbc48486710 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbc48452b94
R13: 0030656c69662f2e R14: 7275632e73646970 R15: 00007fbc48452940
 </TASK>


---
This report is generated by a bot. It may contain errors.
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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:
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If you want syzbot to run the reproducer, reply with:
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If you want to overwrite report's subsystems, reply with:
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If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

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