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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: 5351 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 31 30 7c fe 89 de e9 9a fe ff ff e8 b5 47 17 fe 90 0f 0b e8 ad 47 17 fe 90 <0f> 0b f3 0f 1e fa 65 8b 1d f3 8c f8 0e bf 07 00 00 00 89 de e8 d3
RSP: 0018:ffffc9000d5e7360 EFLAGS: 00010287
RAX: ffffffff83a87333 RBX: 0000000000000002 RCX: 0000000000100000
RDX: ffffc9000e6e3000 RSI: 0000000000035ac8 RDI: 0000000000035ac9
RBP: ffffc9000d5e7480 R08: 0000000000000003 R09: 0000000000000058
R10: 00000000fffffffc R11: 0000000000000002 R12: 1ffff1100a790e01
R13: 0000000000000058 R14: ffff888052524fb8 R15: dffffc0000000000
FS:  00007f1a3b9e36c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000002d2000 CR3: 0000000042f2d000 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: 0033:0x7f1a3ab8ebe9
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:00007f1a3b9e3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1a3adb6090 RCX: 00007f1a3ab8ebe9
RDX: 00002000000000c0 RSI: 0000000040406f06 RDI: 0000000000000007
RBP: 00007f1a3ac11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1a3adb6128 R14: 00007f1a3adb6090 R15: 00007ffc21e59348
 </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 31 30 7c fe 89 de e9 9a fe ff ff e8 b5 47 17 fe 90 0f 0b e8 ad 47 17 fe 90 <0f> 0b f3 0f 1e fa 65 8b 1d f3 8c f8 0e bf 07 00 00 00 89 de e8 d3
RSP: 0018:ffffc9000d5e7360 EFLAGS: 00010287
RAX: ffffffff83a87333 RBX: 0000000000000002 RCX: 0000000000100000
RDX: ffffc9000e6e3000 RSI: 0000000000035ac8 RDI: 0000000000035ac9
RBP: ffffc9000d5e7480 R08: 0000000000000003 R09: 0000000000000058
R10: 00000000fffffffc R11: 0000000000000002 R12: 1ffff1100a790e01
R13: 0000000000000058 R14: ffff888052524fb8 R15: dffffc0000000000
FS:  00007f1a3b9e36c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000002d2000 CR3: 0000000042f2d000 CR4: 0000000000352ef0