This file is indexed.

/usr/lib/gcc-cross/arm-linux-gnueabihf/7/libubsan.so is in libgcc-7-dev-armhf-cross 7.3.0-16ubuntu3cross1.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/lib/gcc-cross/arm-linux-gnueabihf/7/../../../../arm-linux-gnueabihf/lib/libubsan.so.0