[syzbot] [iomap?] WARNING in iomap_iter (3)

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+74cc7d98ae5484c2744d at syzkaller.appspotmail.com
Tested-by: syzbot+74cc7d98ae5484c2744d at syzkaller.appspotmail.com

Tested on:

commit:         ae54567e erofs: get rid of kaddr in `struct z_erofs_ma..
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git erofs-for-6.12-rc4-fixes
console output: https://syzkaller.appspot.com/x/log.txt?x=17bac030580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=286b31f2cf1c36b5
dashboard link: https://syzkaller.appspot.com/bug?extid=74cc7d98ae5484c2744d
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.