/usr/share/man/man3/ber_memalloc.3.gz is in libldap2-dev 2.4.28-1.1ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/lber-memory.3.gz
/usr/share/man/man3/lber-memory.3.gz