Google beefs Linux up kernel defenses in Android

Future versions of Android will be more resilient to exploits thanks to developers' efforts to integrate the latest Linux kernel defenses into the operating system.
Android's security model relies heavily on the Linux kernel that sits at its core. As such, Android developers have always been interested in adding new security features that are intended to prevent potentially malicious code from reaching the kernel, which is the most privileged area of the operating system.
One older example is S