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kernel BUG at fs/ocfs2/suballoc.c:1382!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5352 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
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_block_group_set_bits+0x874/0x9a0 fs/ocfs2/suballoc.c:1382
Code: 07 fe c1 38 c1 0f 8c ab fe ff ff 4c 89 e7 89 f3 e8 41 2e 7c fe 89 de e9 9a fe ff ff e8 c5 45 17 fe 90 0f 0b e8 bd 45 17 fe 90 <0f> 0b f3 0f 1e fa 65 8b 1d 03 8b f8 0e bf 07 00 00 00 89 de e8 e3
RSP: 0000:ffffc9000d487360 EFLAGS: 00010287
RAX: ffffffff83a87523 RBX: 0000000000000002 RCX: 0000000000100000
RDX: ffffc9000ecd1000 RSI: 000000000002b509 RDI: 000000000002b50a
RBP: ffffc9000d487480 R08: 0000000000000003 R09: 0000000000000047
R10: 00000000fffffffc R11: 0000000000000002 R12: 1ffff1100a74da01
R13: 0000000000000047 R14: ffff88804333cfb8 R15: dffffc0000000000
FS:  00007f4a3ec376c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000002d2000 CR3: 0000000036304000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_move_extent fs/ocfs2/move_extents.c:687 [inline]
 __ocfs2_move_extents_range+0x2976/0x3380 fs/ocfs2/move_extents.c:859
 ocfs2_move_extents+0x378/0x960 fs/ocfs2/move_extents.c:926
 ocfs2_ioctl_move_extents+0x53e/0x710 fs/ocfs2/move_extents.c:1052
 ocfs2_ioctl+0x191/0x750 fs/ocfs2/ioctl.c:946
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:584
 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: 0033:0x7f4a3dd8ebe9
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:00007f4a3ec37038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f4a3dfb6090 RCX: 00007f4a3dd8ebe9
RDX: 00002000000000c0 RSI: 0000000040406f06 RDI: 0000000000000004
RBP: 00007f4a3de11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4a3dfb6128 R14: 00007f4a3dfb6090 R15: 00007fff6127a328
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_block_group_set_bits+0x874/0x9a0 fs/ocfs2/suballoc.c:1382
Code: 07 fe c1 38 c1 0f 8c ab fe ff ff 4c 89 e7 89 f3 e8 41 2e 7c fe 89 de e9 9a fe ff ff e8 c5 45 17 fe 90 0f 0b e8 bd 45 17 fe 90 <0f> 0b f3 0f 1e fa 65 8b 1d 03 8b f8 0e bf 07 00 00 00 89 de e8 e3
RSP: 0000:ffffc9000d487360 EFLAGS: 00010287
RAX: ffffffff83a87523 RBX: 0000000000000002 RCX: 0000000000100000
RDX: ffffc9000ecd1000 RSI: 000000000002b509 RDI: 000000000002b50a
RBP: ffffc9000d487480 R08: 0000000000000003 R09: 0000000000000047
R10: 00000000fffffffc R11: 0000000000000002 R12: 1ffff1100a74da01
R13: 0000000000000047 R14: ffff88804333cfb8 R15: dffffc0000000000
FS:  00007f4a3ec376c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000002d2000 CR3: 0000000036304000 CR4: 0000000000352ef0