------------[ cut here ]------------
WARNING: fs/jbd2/transaction.c:1563 at jbd2_journal_dirty_metadata+0x8e6/0xc30 fs/jbd2/transaction.c:1563, CPU#0: syz.0.0/5343
Modules linked in:
CPU: 0 UID: 0 PID: 5343 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:1563
Code: 8b 44 24 40 4d 89 f9 50 53 41 55 41 54 e8 e2 9e 97 fe 48 83 c4 20 90 0f 0b 90 bb ea ff ff ff e9 35 fe ff ff e8 9b fd 30 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:ffffc9000b9ee5f8 EFLAGS: 00010246
RAX: ffffffff829009c5 RBX: 1ffff1100af9e762 RCX: 0000000000100000
RDX: ffffc900220b4000 RSI: 00000000000fffff RDI: 0000000000100000
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200173dcb0 R12: ffff888057c06428
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff1100af80c82
FS:  00007fd7194166c0(0000) GS:ffff88808d414000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000125ef000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_journal_dirty+0x139/0x730 fs/ocfs2/journal.c:834
 ocfs2_block_group_set_bits+0x70e/0x980 fs/ocfs2/suballoc.c:1433
 ocfs2_search_chain+0x1426/0x1d60 fs/ocfs2/suballoc.c:1915
 ocfs2_claim_suballoc_bits+0xc1e/0x1f60 fs/ocfs2/suballoc.c:2011
 __ocfs2_claim_clusters+0x303/0x8f0 fs/ocfs2/suballoc.c:2432
 ocfs2_make_clusters_writable fs/ocfs2/refcounttree.c:3244 [inline]
 ocfs2_replace_cow+0x93b/0x1b50 fs/ocfs2/refcounttree.c:3347
 ocfs2_refcount_cow_hunk fs/ocfs2/refcounttree.c:3425 [inline]
 ocfs2_refcount_cow+0x769/0xc70 fs/ocfs2/refcounttree.c:3468
 ocfs2_prepare_inode_for_write fs/ocfs2/file.c:2346 [inline]
 ocfs2_file_write_iter+0xe03/0x1cf0 fs/ocfs2/file.c:2457
 iter_file_splice_write+0x972/0x10b0 fs/splice.c:738
 do_splice_from fs/splice.c:938 [inline]
 direct_splice_actor+0x101/0x160 fs/splice.c:1161
 splice_direct_to_actor+0x5a8/0xcc0 fs/splice.c:1105
 do_splice_direct_actor fs/splice.c:1204 [inline]
 do_splice_direct+0x181/0x270 fs/splice.c:1230
 do_sendfile+0x4da/0x7e0 fs/read_write.c:1370
 __do_sys_sendfile64 fs/read_write.c:1431 [inline]
 __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd71858f7c9
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:00007fd719416038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fd7187e6180 RCX: 00007fd71858f7c9
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000008
RBP: 00007fd718613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd7187e6218 R14: 00007fd7187e6180 R15: 00007fff46a0dda8
 </TASK>