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Landlock LSM restricts filesystem access (kernel 5.13+). Read-only system paths, read-write work_dir + GPU devices. Opt-in via SPUR_LANDLOCK=1 env var. Bare-metal only (container uses chroot). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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This was referenced Apr 18, 2026
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Summary
Fourth PR in the isolation series (#99). Adds Landlock LSM filesystem restrictions for bare-metal jobs, inspired by the AXIS sandbox.
Changes
landlock.rsmodule using Linux Landlock ABI v1+ (kernel 5.13+)pre_execfor bare-metal jobs only (container path uses chroot)GPU access
GPU device paths (
/dev/dri,/dev/kfd,/dev/nvidia*) are explicitly granted read-write access in the Landlock ruleset.Test plan
🤖 Generated with Claude Code