------------[ cut here ]------------
kernel BUG at fs/ocfs2/refcounttree.c:2895!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 12403 Comm: syz.8.1802 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
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:ffffc90007cbf178 EFLAGS: 00010287
RAX: ffffffff83c787d8 RBX: ffff888063373b40 RCX: 0000000000080000
RDX: ffffc90012341000 RSI: 0000000000001cd7 RDI: 0000000000001cd8
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100c66e769 R12: ffff888063373b40
R13: ffff888063373000 R14: 0000000000000002 R15: 0000000000001000
FS:  00007f04f37516c0(0000) GS:ffff888125ed3000(0000) knlGS:0000000000000000
CS:  0010[  357.588381][T12403] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f57da567286 CR3: 000000002ade2000 CR4: 00000000003526f0
DR0: 000000007fffffff DR1: 00000000000001f8 DR2: 0000000000000004
DR3: 0000000000000008 DR6: 00000000ffff0ff0 DR7: 0000000000000400
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: 0033:0x7f04f595ce59
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:00007f04f3751028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f04f5bd6270 RCX: 00007f04f595ce59
RDX: 00002000000000c0 RSI: 0000000040406f06 RDI: 0000000000000004
RBP: 00007f04f59f2e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f04f5bd6308 R14: 00007f04f5bd6270 R15: 00007fff52882d28
 </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:ffffc90007cbf178 EFLAGS: 00010287
RAX: ffffffff83c787d8 RBX: ffff888063373b40 RCX: 0000000000080000
RDX: ffffc90012341000 RSI: 0000000000001cd7 RDI: 0000000000001cd8
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100c66e769 R12: ffff888063373b40
R13: ffff888063373000 R14: 0000000000000002 R15: 0000000000001000
FS:  00007f04f37516c0(0000) GS:ffff888125fd3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f62b0d90000 CR3: 000000002ade2000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f7 DR2: 00000000ffffffff
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400