This file is indexed.

/usr/share/doc/linux-image-extra-4.13.0-16-generic/changelog.Debian.gz is in linux-image-extra-4.13.0-16-generic 4.13.0-16.19~16.04.3.

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

It is a symlink to /usr/share/doc/linux-image-extra-4.13.0-16-generic/../linux-image-4.13.0-16-generic/changelog.Debian.gz