Yama
Protect against ptrace of processes: kernel.yama.ptrace_scope
Using the Linux Security Module (LSM) Yama we can protect the system against the usage of ptrace. The sysctl key kernel.yama.ptrace_scope sets the behavior.
Summary
Hardening the kernel with kernel.yama.ptrace_scope Ptrace is a great troubleshooting tool for developers to determine how a process functions. It can be used to find programming flaws, like memory leakage. On the other hand, the tool also be used by people with malicious intent. For example to debug a process as a non-privileged user and find the contents of application memory. Yama Linux has the ability to include Linux Security Modules, to provide additional features with the means of a module.