/usr/lib/ is in liblinux-prctl-perl 1.6.0-3+b1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/perl5/
/usr/lib/x86_64-linux-gnu/perl5/5.24/
/usr/lib/x86_64-linux-gnu/perl5/5.24/Linux/
/usr/lib/x86_64-linux-gnu/perl5/5.24/Linux/Prctl/
/usr/lib/x86_64-linux-gnu/perl5/5.24/Linux/Prctl/CapabilityBoundingSet.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Linux/Prctl/CapabilitySet.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Linux/Prctl/Securebits.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Linux/Prctl.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.24/auto/Linux/
/usr/lib/x86_64-linux-gnu/perl5/5.24/auto/Linux/Prctl/
/usr/lib/x86_64-linux-gnu/perl5/5.24/auto/Linux/Prctl/Prctl.so