This file is indexed.

/usr/lib/gcc-cross/aarch64-linux-gnu/7/liblsan.so is in libgcc-7-dev-arm64-cross 7.3.0-16ubuntu3cross1.

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

It is a symlink to /usr/lib/gcc-cross/aarch64-linux-gnu/7/../../../../aarch64-linux-gnu/lib/liblsan.so.0