------------[ cut here ]------------
kernel BUG at fs/ocfs2/refcounttree.c:2895!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 12040 Comm: syz.9.768 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Comput[  454.060446][T12040] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:ocfs2_clear_cow_buffer+0x79/0x80 fs/ocfs2/refcounttree.c:2895
Code: 02 75 21 e8 a9 8f fd fd 48 89 df be 08 00 00 00 e8 ac 6b 69 fe f0 80 23 ef 31 c0 5b 41 5e e9 0e 97 6c 07 cc e8 88 8f fd fd 90 <0f> 0b 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900101f7178 EFLAGS: 00010287
RAX: ffffffff83c787d8 RBX: ffff88805fa0fb40 RCX: 0000000000080000
RDX: ffffc900078f3000 RSI: 0000000000001005 RDI: 0000000000001006
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100bf41f69 R12: ffff88805fa0fb40
R13: ffff88805fa0fc60 R14: 0000000000000002 R15: 0000000000001000
FS:  00007fd6a4a0d6c0(0000) GS:ffff888125ed3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33601ff8 CR3: 000000002abe4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 walk_page_buffers+0x94/0x1e0 fs/ocfs2/aops.c:421
 ocfs2_duplicate_clusters_by_page+0x70b/0xcd0 fs/ocfs2/refcounttree.c:2974
 __ocfs2_move_extent+0x234/0xdd0 fs/ocfs2/move_extents.c:63
 ocfs2_move_extent fs/ocfs2/move_extents.c:686 [inline]
 __ocfs2_move_extents_range fs/ocfs2/move_extents.c:872 [inline]
 ocfs2_move_extents+0x2382/0x3b90 fs/ocfs2/move_extents.c:944
 ocfs2_ioctl_move_extents+0x568/0x780 fs/ocfs2/move_extents.c:1076
 ocfs2_ioctl+0x198/0x7e0 fs/ocfs2/ioctl.c:958
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xff/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd6a67dce59
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:00007fd6a4a0d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd6a6a56090 RCX: 00007fd6a67dce59
RDX: 00002000000000c0 RSI: 0000000040406f06 RDI: 0000000000000004
RBP: 00007fd6a6872d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd6a6a56128 R14: 00007fd6a6a56090 R15: 00007ffe817ecf08
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_clear_cow_buffer+0x79/0x80 fs/ocfs2/refcounttree.c:2895
Code: 02 75 21 e8 a9 8f fd fd 48 89 df be 08 00 00 00 e8 ac 6b 69 fe f0 80 23 ef 31 c0 5b 41 5e e9 0e 97 6c 07 cc e8 88 8f fd fd 90 <0f> 0b 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900101f7178 EFLAGS: 00010287
RAX: ffffffff83c787d8 RBX: ffff88805fa0fb40 RCX: 0000000000080000
RDX: ffffc900078f3000 RSI: 0000000000001005 RDI: 0000000000001006
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100bf41f69 R12: ffff88805fa0fb40
R13: ffff88805fa0fc60 R14: 0000000000000002 R15: 0000000000001000
FS:  00007fd6a4a0d6c0(0000) GS:ffff888125fd3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efc45c17da0 CR3: 000000002abe4000 CR4: 00000000003526f0