Yocto Security Hardening: CVEs

The volume and complexity of the software running in embedded devices is not only astonishing but ever increasing – yet each additional line of code has the potential to introduce a security vulnerability. An attacker may only need to exploit one single vulnerability for a bad outcome to occur. Therefore the obvious way to reduce …

Booting Linux from Linux with kexec

The Linux kernel feature known as ‘kexec‘ allows you to boot from the currently running kernel into a new kernel – effectively turning a Linux distribution into a feature-rich bootloader. This shouldn’t be confused with virtualisation technologies that allow you to run Linux as a guest. This capability has been around since 2005 (2.6.13) and …

Xmas Charity Fundraiser 2020

This Xmas the Good Penguin is raising money for Sparkle, a charity in our local community that supports children, young people, and their families, with disabilities and/or developmental difficulties. Verity Cadwallader, a corporate fundraiser at Sparkle tells us, “We support over 300 families per week through delivering activities and clubs such as independent living skills, …

Booting ARM without an ARM

It’s possible (and easy) to develop software for ARM based platforms without having physical ARM based hardware on your desk – there are many ways to do this such as using the QEMU emulator. However by using something known as a Fixed Virtual Platform (FVP) it’s possible to run software on a simulation of some …