Re: [syzbot] [ocfs2?] kernel BUG in _ocfs2_free_suballoc_bits

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit:    da3ea35007d0 Linux 6.11-rc7
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=139d743b980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=61d235cb8d15001c
dashboard link: https://syzkaller.appspot.com/bug?extid=2d6d9df993967dde8297
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=14a32200580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-da3ea350.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1ab780d224f6/vmlinux-da3ea350.xz
kernel image: https://storage.googleapis.com/syzbot-assets/834dde85c1c2/bzImage-da3ea350.xz
mounted in repro #1: https://storage.googleapis.com/syzbot-assets/fac451c0badd/mount_2.gz
mounted in repro #2: https://storage.googleapis.com/syzbot-assets/81fbd0552bdc/mount_23.gz
mounted in repro #3: https://storage.googleapis.com/syzbot-assets/03da9db81461/mount_24.gz

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

------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:2542!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5596 Comm: syz.0.31 Not tainted 6.11.0-rc7-syzkaller #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 c9 a0 6a fe e9 85 fb ff ff e8 4f 58 03 fe 90 <0f> 0b e8 47 58 03 fe 90 0f 0b f3 0f 1e fa 65 8b 1d 95 a2 73 7c bf
RSP: 0018:ffffc90003147840 EFLAGS: 00010293
RAX: ffffffff83903461 RBX: 00000000ffffffff RCX: ffff888034b74880
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: ffffc900031479e8 R08: ffffffff839023bc R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff2030ee6 R12: ffff88803fa77bc8
R13: dffffc0000000000 R14: ffff88804c17ae00 R15: dffffc0000000000
FS:  00007fedd93ef6c0(0000) GS:ffff88801fe00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1fc838b897 CR3: 0000000056c10000 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: 0033:0x7fedd857cef9
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:00007fedd93ef038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fedd8736058 RCX: 00007fedd857cef9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fedd85ef046 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fedd8736058 R15: 00007ffde5c8eca8
 </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 c9 a0 6a fe e9 85 fb ff ff e8 4f 58 03 fe 90 <0f> 0b e8 47 58 03 fe 90 0f 0b f3 0f 1e fa 65 8b 1d 95 a2 73 7c bf
RSP: 0018:ffffc90003147840 EFLAGS: 00010293
RAX: ffffffff83903461 RBX: 00000000ffffffff RCX: ffff888034b74880
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: ffffc900031479e8 R08: ffffffff839023bc R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff2030ee6 R12: ffff88803fa77bc8
R13: dffffc0000000000 R14: ffff88804c17ae00 R15: dffffc0000000000
FS:  00007fedd93ef6c0(0000) GS:ffff88801fe00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f04fbd58000 CR3: 0000000056c10000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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