/usr/lib/x86_64-linux-gnu/liblinear.so is in liblinear-dev 2.1.0+dfsg-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/liblinear.so.3
/usr/lib/x86_64-linux-gnu/liblinear.so.3