KernelCI now testing Linux Rust code (Collabora blog)

Over on the Collabora blog, Adrian Ratiu writes about the addition of the kernel's Rust code to the KernelCI automated kernel testing project. The blog post looks at what it took to add the support and on some plans for future additions, as well.

An interesting challenge for the rustc docker builds was the fact that the standard Rust method of installing toolchains is via curl https://sh.rustup.rs | sh which might be ok-ish for individual local development, but is a particularly bad idea in an automated CI system. Rustup itself does not (yet) do any signature verifications for its downloads.

Distros like Debian do not ship the version required by the kernel (v1.62), nor even rustup in some cases, and it's unlikely the distro maintainers will keep the versions in sync with the mainline kernel which likely will become a moving target. Thankfully the Rust project provides standalone installers together with GPG signatures which are very useful for CI.