------------[ cut here ]------------
WARNING: CPU: 0 PID: 49 at fs/iomap/iter.c:33 iomap_iter_done fs/iomap/iter.c:33 [inline]
WARNING: CPU: 0 PID: 49 at fs/iomap/iter.c:33 iomap_iter+0xd85/0x1110 fs/iomap/iter.c:78
Modules linked in:
CPU: 0 PID: 49 Comm: kworker/u4:2 Not tainted 5.17.0-rc8-syzkaller-00003-g56e337f2cf13 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: loop0 loop_rootcg_workfn
RIP: 0010:iomap_iter_done fs/iomap/iter.c:33 [inline]
RIP: 0010:iomap_iter+0xd85/0x1110 fs/iomap/iter.c:78
Code: fd ff ff e8 9d f2 d0 ff e9 f9 f9 ff ff e8 c3 0c 8a ff 0f 0b e9 87 f8 ff ff e8 b7 0c 8a ff 0f 0b e9 98 f7 ff ff e8 ab 0c 8a ff <0f> 0b e9 38 f7 ff ff e8 9f 0c 8a ff 0f 0b e9 64 f7 ff ff e8 93 0c
RSP: 0018:ffffc900011a7688 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc900011a7820 RCX: 0000000000000000
RDX: ffff888015fa4080 RSI: ffffffff81ede8e5 RDI: 0000000000000003
RBP: 00000fff80000000 R08: 00000fff80000000 R09: 000000000000000c
R10: ffffffff81ede01b R11: 000000000000003f R12: 0000000000000000
R13: ffffffff80000000 R14: ffffc900011a7848 R15: ffffc900011a7890
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2f4d9e5130 CR3: 000000007b1f8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __iomap_dio_rw+0x6b2/0x1ad0 fs/iomap/direct-io.c:589
 iomap_dio_rw+0x38/0x90 fs/iomap/direct-io.c:680
 ext4_dio_read_iter fs/ext4/file.c:77 [inline]
 ext4_file_read_iter+0x41c/0x5d0 fs/ext4/file.c:128
 call_read_iter include/linux/fs.h:2068 [inline]
 lo_rw_aio.isra.0+0xa99/0xc90 drivers/block/loop.c:454
 do_req_filebacked drivers/block/loop.c:498 [inline]
 loop_handle_cmd drivers/block/loop.c:1852 [inline]
 loop_process_work+0x92f/0x1db0 drivers/block/loop.c:1892
 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
 worker_thread+0x657/0x1110 kernel/workqueue.c:2454
 kthread+0x2e9/0x3a0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>