/usr/share/doc/linux-tools-4.13.0-41-generic/changelog.Debian.gz is in linux-tools-4.13.0-41-generic 4.13.0-41.46~16.04.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/linux-tools-4.13.0-41-generic/../linux-hwe-tools-4.13.0-41/changelog.Debian.gz