[syzbot] [erofs?] WARNING in get_next_unlocked_entry

[syzbot]

Hello,

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

Reported-by: syzbot+31b8fb02cb8a25bd5e78 at syzkaller.appspotmail.com
Tested-by: syzbot+31b8fb02cb8a25bd5e78 at syzkaller.appspotmail.com

Tested on:

commit:         3027b141 erofs: correct FSDAX detection
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git dev-test
console output: https://syzkaller.appspot.com/x/log.txt?x=16e2597c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a1db0fea040c2a9f
dashboard link: https://syzkaller.appspot.com/bug?extid=31b8fb02cb8a25bd5e78
compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8

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