linux-kernel - [syzbot] [ocfs2?] kernel BUG in ocfs2_group

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: <671fba7c.050a0220.21b2f.0006.GAE@google.com>
Date: Mon, 28 Oct 2024 09:23:24 -0700
From: syzbot <syzbot+ce0c7bd35d4b7c7300cd@...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?] kernel BUG in ocfs2_group_extend

Hello,

syzbot found the following issue on:

HEAD commit:    c2ee9f594da8 KVM: selftests: Fix build on on non-x86 archi..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17baf640580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=fc6f8ce8c5369043
dashboard link: https://syzkaller.appspot.com/bug?extid=ce0c7bd35d4b7c7300cd
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

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

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-c2ee9f59.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/8a3541902b13/vmlinux-c2ee9f59.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a00efacc2604/bzImage-c2ee9f59.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ce0c7bd35d4b7c7300cd@...kaller.appspotmail.com

loop0: detected capacity change from 32768 to 32767
------------[ cut here ]------------
kernel BUG at fs/ocfs2/resize.c:308!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5104 Comm: syz.0.0 Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ocfs2_group_extend+0xb28/0xb30 fs/ocfs2/resize.c:308
Code: ff ff 44 89 f9 80 e1 07 fe c1 38 c1 0f 8c 30 f9 ff ff 4c 89 ff e8 68 c8 69 fe e9 23 f9 ff ff e8 4e 92 31 08 e8 49 03 00 fe 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000b2a7b20 EFLAGS: 00010283
RAX: ffffffff8394d497 RBX: 00000000ffffffff RCX: 0000000000040000
RDX: ffffc9000ba49000 RSI: 000000000000055d RDI: 000000000000055e
RBP: ffffc9000b2a7cf0 R08: ffffffff8394cc23 R09: 1ffffffff2039fdd
R10: dffffc0000000000 R11: fffffbfff2039fde R12: ffff888041644fb8
R13: dffffc0000000000 R14: 1ffff92001654f74 R15: ffff88804c4d6e00
FS:  00007fd5c99936c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562c6b6f9b08 CR3: 000000003a86c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ocfs2_ioctl+0x771/0x7d0 fs/ocfs2/ioctl.c:873
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
 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: 0033:0x7fd5c8b7dff9
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:00007fd5c9993038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd5c8d36058 RCX: 00007fd5c8b7dff9
RDX: 0000000020000100 RSI: 0000000040046f01 RDI: 0000000000000004
RBP: 00007fd5c8bf0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd5c8d36058 R15: 00007ffd7b458dc8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_group_extend+0xb28/0xb30 fs/ocfs2/resize.c:308
Code: ff ff 44 89 f9 80 e1 07 fe c1 38 c1 0f 8c 30 f9 ff ff 4c 89 ff e8 68 c8 69 fe e9 23 f9 ff ff e8 4e 92 31 08 e8 49 03 00 fe 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000b2a7b20 EFLAGS: 00010283
RAX: ffffffff8394d497 RBX: 00000000ffffffff RCX: 0000000000040000
RDX: ffffc9000ba49000 RSI: 000000000000055d RDI: 000000000000055e
RBP: ffffc9000b2a7cf0 R08: ffffffff8394cc23 R09: 1ffffffff2039fdd
R10: dffffc0000000000 R11: fffffbfff2039fde R12: ffff888041644fb8
R13: dffffc0000000000 R14: 1ffff92001654f74 R15: ffff88804c4d6e00
FS:  00007fd5c99936c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd5c9971f98 CR3: 000000003a86c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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