------------[ cut here ]------------
WARNING: CPU: 0 PID: 5371 at fs/jbd2/transaction.c:1553 jbd2_journal_dirty_metadata+0x8e6/0xc30 fs/jbd2/transaction.c:1553
Modules linked in:
CPU: 0 UID: 0 PID: 5371 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 d2 2e 9e fe 48 83 c4 20 90 0f 0b 90 bb ea ff ff ff e9 35 fe ff ff e8 3b 4d 36 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:ffffc9000d406918 EFLAGS: 00010287
RAX: ffffffff82897155 RBX: 1ffff11008ad6b41 RCX: 0000000000100000
RDX: ffffc9000ed24000 RSI: 0000000000052a2c RDI: 0000000000052a2d
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001a80d14 R12: ffff888012419068
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff1100248320a
FS:  00007f3cd75d26c0(0000) GS:ffff88808d20a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3cd75b0fc8 CR3: 00000000436f8000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_journal_dirty+0x149/0x740 fs/ocfs2/journal.c:834
 ocfs2_add_branch fs/ocfs2/alloc.c:1326 [inline]
 ocfs2_grow_tree+0x2591/0x34c0 fs/ocfs2/alloc.c:1585
 ocfs2_split_and_insert+0x3a1/0x1210 fs/ocfs2/alloc.c:4951
 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+0x702/0xdf0 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+0xd56/0x1310 fs/read_write.c:1591
 __do_sys_copy_file_range fs/read_write.c:1677 [inline]
 __se_sys_copy_file_range+0x2fb/0x470 fs/read_write.c:1644
 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: 0033:0x7f3cd678eba9
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:00007f3cd75d2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000146
RAX: ffffffffffffffda RBX: 00007f3cd69d6180 RCX: 00007f3cd678eba9
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f3cd6811e19 R08: fffffbffa003e458 R09: 0700000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3cd69d6218 R14: 00007f3cd69d6180 R15: 00007ffc2e7f18b8
 </TASK>