[v6.1] kernel BUG in __ocfs2_move_extents_range (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 8ce36b2849ef Linux 6.1.163
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=15466c02580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f0605c5af04d7603
dashboard link: https://syzkaller.appspot.com/bug?extid=aa99459be961844b1572
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/25d3bb1313db/disk-8ce36b28.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/53d3c77e16da/vmlinux-8ce36b28.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ca171a78e481/bzImage-8ce36b28.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+aa9945...@syzkaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:1349!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4471 Comm: syz.2.10 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:ocfs2_block_group_set_bits+0x5c5/0x740 fs/ocfs2/suballoc.c:1349
Code: ff 44 89 e1 80 e1 07 fe c1 38 c1 0f 8c 26 fd ff ff 4c 89 e7 e8 7c 06 86 fe e9 19 fd ff ff e8 c2 1a 35 fe 0f 0b e8 bb 1a 35 fe <0f> 0b 65 44 8b 25 a1 c0 b4 7c 48 c7 c0 30 ce 1f 8e 48 c1 e8 03 48
RSP: 0018:ffffc90004bcf3a0 EFLAGS: 00010246
RAX: ffffffff834d58f5 RBX: 000000000000007f RCX: 0000000000080000
RDX: ffffc9000eabb000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90004bcf490 R08: 0000000000000007 R09: 000000000000007f
R10: 00000000fffffffc R11: 0000000000000002 R12: dffffc0000000000
R13: 0000000000000007 R14: ffff88802458f000 R15: 0000000000000002
FS: 00007f305b9d56c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c271686 CR3: 000000005823e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
ocfs2_move_extent fs/ocfs2/move_extents.c:693 [inline]
__ocfs2_move_extents_range+0x2a0f/0x35d0 fs/ocfs2/move_extents.c:866
ocfs2_move_extents+0x3ad/0x9c0 fs/ocfs2/move_extents.c:938
ocfs2_ioctl_move_extents+0x520/0x6c0 fs/ocfs2/move_extents.c:1064
ocfs2_ioctl+0x31e/0x7c0 fs/ocfs2/ioctl.c:930
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f305d79bf79
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f305b9d5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f305da16090 RCX: 00007f305d79bf79
RDX: 00002000000000c0 RSI: 0000000040406f06 RDI: 0000000000000005
RBP: 00007f305d8327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f305da16128 R14: 00007f305da16090 R15: 00007ffe7efd44b8
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_block_group_set_bits+0x5c5/0x740 fs/ocfs2/suballoc.c:1349
Code: ff 44 89 e1 80 e1 07 fe c1 38 c1 0f 8c 26 fd ff ff 4c 89 e7 e8 7c 06 86 fe e9 19 fd ff ff e8 c2 1a 35 fe 0f 0b e8 bb 1a 35 fe <0f> 0b 65 44 8b 25 a1 c0 b4 7c 48 c7 c0 30 ce 1f 8e 48 c1 e8 03 48
RSP: 0018:ffffc90004bcf3a0 EFLAGS: 00010246
RAX: ffffffff834d58f5 RBX: 000000000000007f RCX: 0000000000080000
RDX: ffffc9000eabb000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90004bcf490 R08: 0000000000000007 R09: 000000000000007f
R10: 00000000fffffffc R11: 0000000000000002 R12: dffffc0000000000
R13: 0000000000000007 R14: ffff88802458f000 R15: 0000000000000002
FS: 00007f305b9d56c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f544500c286 CR3: 000000005823e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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