/usr/lib/x86_64-linux-gnu/libopensm.so is in libopensm-dev 3.3.18-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libopensm.so.5.2.1
/usr/lib/x86_64-linux-gnu/libopensm.so.5.2.1