/usr/lib/libmca_common_sm.so.4 is in libopenmpi1.10 1.10.2-8ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libmca_common_sm.so.4.0.4
/usr/lib/libmca_common_sm.so.4.0.4