Message-ID: <000000000000b10c48062134870d@google.com>
Date: Tue, 03 Sep 2024 03:29:18 -0700
From: syzbot <syzbot+2d6d9df993967dde8297@...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_free_suballoc_bits

Hello,

syzbot found the following issue on:

HEAD commit:    fb24560f31f9 Merge tag 'lsm-pr-20240830' of git://git.kern..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15107925980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=996585887acdadb3
dashboard link: https://syzkaller.appspot.com/bug?extid=2d6d9df993967dde8297
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/7bc7510fe41f/non_bootable_disk-fb24560f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2d39db26a2bc/vmlinux-fb24560f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8910481ae16e/bzImage-fb24560f.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2d6d9df993967dde8297@...kaller.appspotmail.com

loop0: detected capacity change from 0 to 32768
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:2542!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5120 Comm: syz.0.0 Not tainted 6.11.0-rc5-syzkaller-00207-gfb24560f31f9 #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_free_suballoc_bits+0x11a2/0x14a0 fs/ocfs2/suballoc.c:2542
Code: 18 e9 8f fb ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 92 fb ff ff 4c 89 e7 e8 39 c7 6a fe e9 85 fb ff ff e8 7f 7b 03 fe 90 <0f> 0b e8 77 7b 03 fe 90 0f 0b f3 0f 1e fa 65 8b 1d 45 c6 73 7c bf
RSP: 0018:ffffc90002e5f840 EFLAGS: 00010287
RAX: ffffffff839010b1 RBX: 00000000ffffffff RCX: 0000000000040000
RDX: ffffc9000b849000 RSI: 000000000001fa9e RDI: 000000000001fa9f
RBP: ffffc90002e5f9e8 R08: ffffffff8390000c R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff2030dbe R12: ffff88804098f0e8
R13: dffffc0000000000 R14: ffff888013113e00 R15: dffffc0000000000
FS:  00007f44d49666c0(0000) GS:ffff88801fe00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f44d4923f98 CR3: 000000000072c000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 _ocfs2_free_clusters+0x5ff/0xad0 fs/ocfs2/suballoc.c:2646
 ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5971 [inline]
 __ocfs2_flush_truncate_log+0x760/0x1250 fs/ocfs2/alloc.c:6054
 ocfs2_flush_truncate_log+0x4f/0x70 fs/ocfs2/alloc.c:6076
 ocfs2_sync_fs+0x125/0x390 fs/ocfs2/super.c:402
 iterate_supers+0xc6/0x190 fs/super.c:934
 ksys_sync+0xdb/0x1c0 fs/sync.c:104
 __do_sys_sync+0xe/0x20 fs/sync.c:113
 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: 0033:0x7f44d3b79eb9
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:00007f44d4966038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f44d3d15f80 RCX: 00007f44d3b79eb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f44d3be793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f44d3d15f80 R15: 00007ffee36f9688
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:_ocfs2_free_suballoc_bits+0x11a2/0x14a0 fs/ocfs2/suballoc.c:2542
Code: 18 e9 8f fb ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 92 fb ff ff 4c 89 e7 e8 39 c7 6a fe e9 85 fb ff ff e8 7f 7b 03 fe 90 <0f> 0b e8 77 7b 03 fe 90 0f 0b f3 0f 1e fa 65 8b 1d 45 c6 73 7c bf
RSP: 0018:ffffc90002e5f840 EFLAGS: 00010287
RAX: ffffffff839010b1 RBX: 00000000ffffffff RCX: 0000000000040000
RDX: ffffc9000b849000 RSI: 000000000001fa9e RDI: 000000000001fa9f
RBP: ffffc90002e5f9e8 R08: ffffffff8390000c R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff2030dbe R12: ffff88804098f0e8
R13: dffffc0000000000 R14: ffff888013113e00 R15: dffffc0000000000
FS:  00007f44d49666c0(0000) GS:ffff88801fe00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f44d4923f98 CR3: 000000000072c000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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