Introduction to Landlock: Linux Security API for Application Resource Control

Summary

Landlock is a Linux security API that allows applications to explicitly declare which system resources they need access to, creating a security contract with the kernel. Similar to OpenBSD's unveil() and pledge(), it enables programs to restrict themselves to only necessary files and resources, providing defense-in-depth against potential compromises. The article serves as an accessible introduction to this security mechanism, highlighting its simplicity and developer-friendly approach compared to traditional Linux security methods.