------------[ cut here ]------------
WARNING: fs/jbd2/transaction.c:1553 at jbd2_journal_dirty_metadata+0x8e6/0xc30 fs/jbd2/transaction.c:1553, CPU#0: syz.0.0/5344
Modules linked in:
CPU: 0 UID: 0 PID: 5344 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:jbd2_journal_dirty_metadata+0x8e6/0xc30 fs/jbd2/transaction.c:1553
Code: 8b 44 24 40 4d 89 f9 50 53 41 55 41 54 e8 b2 e8 98 fe 48 83 c4 20 90 0f 0b 90 bb ea ff ff ff e9 35 fe ff ff e8 ab 70 32 ff 90 <0f> 0b 90 bb e4 ff ff ff e9 22 fe ff ff 48 8b 44 24 30 48 83 c0 18
RSP: 0018:ffffc9000d53e938 EFLAGS: 00010287
RAX: ffffffff828eba55 RBX: 1ffff1100874e223 RCX: 0000000000100000
RDX: ffffc90021003000 RSI: 000000000006c89b RDI: 000000000006c89c
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001aa7d18 R12: ffff888011c04ba8
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff11002380972
FS:  00007fb51fecc6c0(0000) GS:ffff88808d6b5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb51fe68fc8 CR3: 000000001259c000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_journal_dirty+0x139/0x730 fs/ocfs2/journal.c:834
 ocfs2_insert_path+0xb6a/0x12f0 fs/ocfs2/alloc.c:4242
 ocfs2_do_insert_extent+0x9c5/0xef0 fs/ocfs2/alloc.c:4342
 ocfs2_split_and_insert+0x5b0/0x1210 fs/ocfs2/alloc.c:4989
 ocfs2_split_extent+0x1247/0x1c50 fs/ocfs2/alloc.c:5133
 ocfs2_change_extent_flag+0x975/0xc30 fs/ocfs2/alloc.c:5230
 ocfs2_mark_extent_refcounted fs/ocfs2/refcounttree.c:2348 [inline]
 ocfs2_add_refcount_flag+0x649/0xda0 fs/ocfs2/refcounttree.c:3692
 ocfs2_reflink_remap_extent fs/ocfs2/refcounttree.c:4554 [inline]
 ocfs2_reflink_remap_blocks+0xd30/0x1930 fs/ocfs2/refcounttree.c:4681
 ocfs2_remap_file_range+0x4b7/0x730 fs/ocfs2/file.c:2740
 vfs_copy_file_range+0xd81/0x1370 fs/read_write.c:1598
 __do_sys_copy_file_range fs/read_write.c:1681 [inline]
 __se_sys_copy_file_range+0x2fb/0x470 fs/read_write.c:1648
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb51ef8f7c9
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:00007fb51fecc038 EFLAGS: 00000246 ORIG_RAX: 0000000000000146
RAX: ffffffffffffffda RBX: 00007fb51f1e6180 RCX: 00007fb51ef8f7c9
RDX: 0000000000000009 RSI: 0000000000000000 RDI: 000000000000000a
RBP: 00007fb51f013f91 R08: fffffbffa003e458 R09: 0700000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb51f1e6218 R14: 00007fb51f1e6180 R15: 00007fff2bf81d98
 </TASK>