loop0: detected capacity change from 0 to 32768
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
------------[ cut here ]------------
kernel BUG at fs/ocfs2/refcounttree.c:2890!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5325 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 04/01/2014
RIP: 0010:ocfs2_clear_cow_buffer+0x79/0x80 fs/ocfs2/refcounttree.c:2890
Code: 02 75 21 e8 c9 a6 fb fd 48 89 df be 08 00 00 00 e8 bc 77 68 fe 3e 80 23 ef 31 c0 5b 41 5e c3 cc cc cc cc cc e8 a8 a6 fb 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:ffffc9000e28edb8 EFLAGS: 00010283
RAX: ffffffff83ca2d88 RBX: ffff88801fcd1e80 RCX: 0000000000100000
RDX: ffffc9000eff2000 RSI: 000000000000096a RDI: 000000000000096b
RBP: 0000000000000001 R08: ffff88801fcd1e87 R09: 1ffff11003f9a3d0
R10: dffffc0000000000 R11: ffffed1003f9a3d1 R12: ffff88801fcd1e80
R13: ffff88801f52b000 R14: 0000000000000002 R15: 0000000000001000
FS:  00007ff6da7f56c0(0000) GS:ffff88808c87c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff6de5cb8b0 CR3: 000000000060f000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 walk_page_buffers+0x94/0x1e0 fs/ocfs2/aops.c:421
 ocfs2_duplicate_clusters_by_page+0x713/0xce0 fs/ocfs2/refcounttree.c:2969
 ocfs2_replace_clusters fs/ocfs2/refcounttree.c:3120 [inline]
 ocfs2_make_clusters_writable fs/ocfs2/refcounttree.c:3252 [inline]
 ocfs2_replace_cow+0xaf6/0x1c90 fs/ocfs2/refcounttree.c:3346
 ocfs2_refcount_cow_hunk fs/ocfs2/refcounttree.c:3424 [inline]
 ocfs2_refcount_cow+0x790/0xd40 fs/ocfs2/refcounttree.c:3467
 ocfs2_cow_file_pos+0x36b/0x3d0 fs/ocfs2/file.c:367
 ocfs2_orphan_for_truncate fs/ocfs2/file.c:388 [inline]
 ocfs2_truncate_file+0x398/0x14e0 fs/ocfs2/file.c:501
 ocfs2_setattr+0x15e5/0x1ca0 fs/ocfs2/file.c:1219
 notify_change+0xc1a/0xf40 fs/attr.c:556
 do_truncate+0x1c2/0x250 fs/open.c:68
 vfs_truncate+0x4b4/0x540 fs/open.c:118
 ksys_truncate+0xf3/0x1c0 fs/open.c:142
 __do_sys_truncate fs/open.c:154 [inline]
 __se_sys_truncate fs/open.c:152 [inline]
 __x64_sys_truncate+0x5b/0x70 fs/open.c:152
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff6de39ce59
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:00007ff6da7f4fe8 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007ff6de615fa0 RCX: 00007ff6de39ce59
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000200000000080
RBP: 00007ff6de432d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff6de616038 R14: 00007ff6de615fa0 R15: 00007ffe81622808
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_clear_cow_buffer+0x79/0x80 fs/ocfs2/refcounttree.c:2890
Code: 02 75 21 e8 c9 a6 fb fd 48 89 df be 08 00 00 00 e8 bc 77 68 fe 3e 80 23 ef 31 c0 5b 41 5e c3 cc cc cc cc cc e8 a8 a6 fb 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:ffffc9000e28edb8 EFLAGS: 00010283
RAX: ffffffff83ca2d88 RBX: ffff88801fcd1e80 RCX: 0000000000100000
RDX: ffffc9000eff2000 RSI: 000000000000096a RDI: 000000000000096b
RBP: 0000000000000001 R08: ffff88801fcd1e87 R09: 1ffff11003f9a3d0
R10: dffffc0000000000 R11: ffffed1003f9a3d1 R12: ffff88801fcd1e80
R13: ffff88801f52b000 R14: 0000000000000002 R15: 0000000000001000
FS:  00007ff6da7f56c0(0000) GS:ffff88808c87c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff6de587a80 CR3: 000000000060f000 CR4: 0000000000352ef0