This file is indexed.

/usr/src/linux-headers-4.15.0-24-lowlatency/Kbuild is in linux-headers-4.15.0-24-lowlatency 4.15.0-24.26.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/src/linux-headers-4.15.0-24-lowlatency/../linux-headers-4.15.0-24/Kbuild