linux-kernel - [syzbot] [ocfs2?] WARNING: locking bug in ocfs2_inode_lock_full

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <68d5eda5.a00a0220.303701.0021.GAE@google.com>
Date: Thu, 25 Sep 2025 18:34:29 -0700
From: syzbot <syzbot+f1b7d3d179cd1db8518a@...kaller.appspotmail.com>
To: jlbec@...lplan.org, joseph.qi@...ux.alibaba.com, 
	linux-kernel@...r.kernel.org, mark@...heh.com, ocfs2-devel@...ts.linux.dev, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [ocfs2?] WARNING: locking bug in ocfs2_inode_lock_full_nested

Hello,

syzbot found the following issue on:

HEAD commit:    2d5bd41a4505 Merge tag 'clk-fixes-for-linus' of git://git...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1029c8e2580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f5b21423ca3f0a96
dashboard link: https://syzkaller.appspot.com/bug?extid=f1b7d3d179cd1db8518a
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b7202ac3386f/disk-2d5bd41a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/826ea91f3056/vmlinux-2d5bd41a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a56cfda9c03f/bzImage-2d5bd41a.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f1b7d3d179cd1db8518a@...kaller.appspotmail.com

loop3: detected capacity change from 0 to 1024
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(!test_bit(class_idx, lock_classes_in_use))
WARNING: CPU: 0 PID: 10994 at kernel/locking/lockdep.c:5207 __lock_acquire+0xc0c/0xd20 kernel/locking/lockdep.c:5207
Modules linked in:
CPU: 0 UID: 0 PID: 10994 Comm: syz.3.280 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__lock_acquire+0xc0c/0xd20 kernel/locking/lockdep.c:5207
Code: ff ff 90 e8 26 94 18 03 85 c0 74 22 83 3d bf 60 81 0d 00 75 19 90 48 c7 c7 2c 9f 21 8d 48 c7 c6 ca ed 09 8d e8 75 2c e7 ff 90 <0f> 0b 90 90 90 e9 8f 00 00 00 90 0f 0b 90 e9 8d fe ff ff 90 e8 eb
RSP: 0018:ffffc90004b97410 EFLAGS: 00010046
RAX: a5a653e04eba8400 RBX: ffff88802d45d940 RCX: 0000000000080000
RDX: ffffc9000db71000 RSI: 0000000000000af6 RDI: 0000000000000af7
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1017104863 R12: 0000000000000004
R13: 0000000000000004 R14: ffff88802d45e4b0 R15: 0000000000000000
FS:  00007f39acc7e6c0(0000) GS:ffff8881268bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000003cd8e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
 rt_spin_lock+0x88/0x2c0 kernel/locking/spinlock_rt.c:56
 spin_lock include/linux/spinlock_rt.h:44 [inline]
 ocfs2_is_hard_readonly fs/ocfs2/ocfs2.h:665 [inline]
 ocfs2_inode_lock_full_nested+0x120/0x1b20 fs/ocfs2/dlmglue.c:2446
 ocfs2_inode_lock_tracker+0x1be/0x660 fs/ocfs2/dlmglue.c:2691
 ocfs2_setattr+0x731/0x1b40 fs/ocfs2/file.c:1173
 notify_change+0xb34/0xe60 fs/attr.c:552
 chown_common+0x40c/0x5c0 fs/open.c:791
 do_fchownat+0x161/0x270 fs/open.c:822
 __do_sys_lchown fs/open.c:847 [inline]
 __se_sys_lchown fs/open.c:845 [inline]
 __x64_sys_lchown+0x85/0xa0 fs/open.c:845
 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: 0033:0x7f39aea1ec29
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:00007f39acc7e038 EFLAGS: 00000246 ORIG_RAX: 000000000000005e
RAX: ffffffffffffffda RBX: 00007f39aec65fa0 RCX: 00007f39aea1ec29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000a80
RBP: 00007f39aeaa1e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f39aec66038 R14: 00007f39aec65fa0 R15: 00007ffeedc44808
 </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.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

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

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(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