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A Report from the 2024 Image-Based Linux Summit

[LWN subscriber-only content] The Image-Based Linux Summit has by now established itself as a yearly event. Following on from last year's edition, the third edition was held in Berlin on September 24, the day before All Systems Go! 2024 (ASG).

One of the most important pieces of work was the implementation of the systemd-pcrlock tool, which aims to solve a major gap in the measured-boot story, namely how to deal with inherently local platform-configuration registers (PCRs) that are not under the control of the OS vendor. OpenSUSE has implemented full disk encryption bound to the TPM using signed policies and pcrlock, added support for soft-reboot using the Btrfs-based transactional-updates mechanism, and provides systemd-boot as an option in the image installer. The current plan of record is for the postmarketOS developers to provide a shim library that implements the APIs missing from musl that are needed by systemd, such as pidfd_spawn(), gshadow(), and additional printf() formatters capabilities.

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