iter->iomap.offset + iter->iomap.length <= iter->pos
WARNING: fs/iomap/iter.c:36 at iomap_iter_done fs/iomap/iter.c:36 [inline], CPU#1: kworker/u32:14/7998
WARNING: fs/iomap/iter.c:36 at iomap_iter+0xfa4/0x1210 fs/iomap/iter.c:114, CPU#1: kworker/u32:14/7998
Modules linked in:
CPU: 1 UID: 0 PID: 7998 Comm: kworker/u32:14 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
Workqueue: loop6 loop_workfn
RIP: 0010:iomap_iter_done fs/iomap/iter.c:36 [inline]
RIP: 0010:iomap_iter+0xfa4/0x1210 fs/iomap/iter.c:114
Code: 0f 0b 90 e9 6f f7 ff ff e8 09 5a 5a ff 90 0f 0b 90 e9 fb f7 ff ff e8 fb 59 5a ff 90 0f 0b 90 e9 3b f8 ff ff e8 ed 59 5a ff 90 <0f> 0b 90 e9 9a f7 ff ff e8 df 59 5a ff 90 0f 0b 90 e9 70 f7 ff ff
RSP: 0018:ffffc900046c76f8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc900046c7880 RCX: ffffffff82ae386d
RDX: ffff88803447a480 RSI: ffffffff82ae40d3 RDI: ffff88803447a480
RBP: 0000003e80000000 R08: 0000000000000006 R09: 0000003e80000000
R10: 800000000007dfff R11: 000000000000760b R12: 800000000007de00
R13: ffffc900046c78c2 R14: ffffc900046c78f0 R15: 800000000007dfff
FS:  0000000000000000(0000) GS:ffff8880d644a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1b4765eff8 CR3: 000000002a1e7000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 iomap_file_buffered_write+0x24a/0xac0 fs/iomap/buffered-io.c:1210
 blkdev_buffered_write block/fops.c:736 [inline]
 blkdev_write_iter+0x575/0xd70 block/fops.c:802
 lo_rw_aio.isra.0+0xa5f/0xd60 drivers/block/loop.c:403
 do_req_filebacked drivers/block/loop.c:434 [inline]
 loop_handle_cmd drivers/block/loop.c:1926 [inline]
 loop_process_work+0x13a/0x11c0 drivers/block/loop.c:1961
 process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
 process_scheduled_works kernel/workqueue.c:3358 [inline]
 worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
 kthread+0x370/0x450 kernel/kthread.c:467
 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>