linux-kernel - Re: [syzbot] [ntfs3?] WARNING in ni

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Message-ID: <686cd312.a00a0220.338033.0009.GAE@google.com>
Date: Tue, 08 Jul 2025 01:13:06 -0700
From: syzbot <syzbot+b0373017f711c06ada64@...kaller.appspotmail.com>
To: almaz.alexandrovich@...agon-software.com, linux-kernel@...r.kernel.org, 
	moonhee.lee.ca@...il.com, ntfs3@...ts.linux.dev, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [ntfs3?] WARNING in ni_rename

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING in ni_rename

loop0: detected capacity change from 0 to 4096
------------[ cut here ]------------
WARNING: fs/ntfs3/frecord.c:3030 at ni_rename+0xee/0x100 fs/ntfs3/frecord.c:3029, CPU#1: syz.0.16/6620
Modules linked in:
CPU: 1 UID: 0 PID: 6620 Comm: syz.0.16 Not tainted 6.16.0-rc4-next-20250704-syzkaller-07381-g26ffb3d6f02c-dirty #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:ni_rename+0xee/0x100 fs/ntfs3/frecord.c:3029
Code: 8b 05 b6 5d 9a 0f 48 3b 44 24 10 75 22 44 89 e0 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d e9 d9 a6 6c 08 cc e8 f3 7d b9 fe 90 <0f> 0b 90 eb c5 e8 68 cc 69 08 0f 1f 84 00 00 00 00 00 90 90 90 90
RSP: 0018:ffffc900033e7ab8 EFLAGS: 00010293
RAX: ffffffff8306228d RBX: 00000000fffffffe RCX: ffff888021723c00
RDX: 0000000000000000 RSI: 00000000fffffffe RDI: 0000000000000000
RBP: 00000000fffffffe R08: ffffffff8fa18a37 R09: 1ffffffff1f43146
R10: dffffc0000000000 R11: fffffbfff1f43147 R12: 0000000000000000
R13: ffff88802f30d500 R14: ffff88806d04d0c8 R15: ffff88806d04b368
FS:  00007f1edd33f6c0(0000) GS:ffff888125d18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001060 CR3: 000000007c546000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ntfs_rename+0x6e2/0xb40 fs/ntfs3/namei.c:316
 vfs_rename+0xbd7/0xf00 fs/namei.c:5129
 do_renameat2+0x6ce/0xa80 fs/namei.c:5278
 __do_sys_rename fs/namei.c:5325 [inline]
 __se_sys_rename fs/namei.c:5323 [inline]
 __x64_sys_rename+0x82/0x90 fs/namei.c:5323
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1edc58e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1edd33f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f1edc7b5fa0 RCX: 00007f1edc58e929
RDX: 0000000000000000 RSI: 0000200000001040 RDI: 0000200000000280
RBP: 00007f1edc610b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1edc7b5fa0 R15: 00007ffcb3616c48
 </TASK>


Tested on:

commit:         26ffb3d6 Add linux-next specific files for 20250704
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=16c95582580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=59817f9ef599726c
dashboard link: https://syzkaller.appspot.com/bug?extid=b0373017f711c06ada64
compiler:       Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
patch:          https://syzkaller.appspot.com/x/patch.diff?x=175edf70580000