June 06, 2016
Quite a lot has happened in xdg-app since last time I blogged about it. Most noticeably, it isn't called xdg-app any more, having been renamed to Flatpak. It is now available in Debian experimental under that name, and the xdg-app package that was briefly there has been removed. I'm currently in the process of updating Flatpak to the latest version 0.6.4.
The privileged part has also spun off into a separate project, Bubblewrap, which recently had its first release (0.1.0). This is intended as a common component with which unprivileged users can start a container in a way that won't let them escalate privileges, like a more flexible version of linux-user-chroot.
Bubblewrap has also been made available in Debian, maintained by Laszlo Boszormenyi (also maintainer of linux-user-chroot). Yesterday I sent a patch to update Laszlo's packaging for 0.1.0. I'm hoping to become a co-maintainer to upload that myself, since I suspect Flatpak and Bubblewrap might need to track each other quite closely. For the moment, Flatpak still uses its own internal copy of Bubblewrap, but I consider that to be a bug and I'd like to be able to fix it soon.
At some point I also want to experiment with using Bubblewrap to sandbox some of the game engines that are packaged in Debian: networked games are a large attack surface, and typically consist of the sort of speed-optimized C or C++ code that is an ideal home for security vulnerabilities. I've already made some progress on jailing game engines with AppArmor, but making sensitive files completely invisible to the game engine seems even better than preventing them from being opened.
Next weekend I'm going to be heading to Toronto for the GTK Hackfest, primarily to to talk to GNOME and Flatpak developers about their plans for sandboxing, portals and Flatpak. Hopefully we can make some good progress there: the more I know about the state of software security, the less happy I am with random applications all being equally privileged. Newer display technologies like Wayland and Mir represent an opportunity to plug one of the largest holes in typical application containerization, which is a major step in bringing sandboxes like Flatpak and Snap from proof-of-concept to a practical improvement in security.
Other next steps for Flatpak in Debian:
testing. I've taken the first step towards that by uploading
libgsystemto unstable. Before Flatpak can follow, OSTree also needs to move.
help. I'd appreciate contributions to the OSTree packaging from people who are interested in using it to deploy
dpkg-based operating systems - I'm primarily looking at it from the Flatpak perspective, so the boot/OS side of it isn't so well tested. Red Hat have
rpm-ostree, and I believe Endless do something analogous to build OS images with
dpkg, but I haven't had a chance to look into that in detail yet.
With the release of virglrenderer 0.8.0, getting accelerated OpenGL within a virtual machine (VM) made a big leap forward. Since virglrenderer-0.7.0,…
Ongoing work on the reverse-engineered Panfrost OpenGL ES driver for Arm Mali GPUs has turned the RK3399 SoC into a very attractive platform…
As part of its unwavering commitment to open source and open standards, Collabora is proud to be part of bringing the recently-released…
There's been quite a few updates to Zink, an OpenGL implementation on top of Vulkan, since I last wrote about it. Here's an overview of…
A little over a month and a half ago, Collaborans including Aaron Boxer, George Kiagiadakis, Guillaume Desmottes, Stéphane Cerveau and myself…
In my last Panfrost blog post, I announced my internship goal: improve Panfrost to run GNOME3. GNOME is a popular Linux desktop making heavy…