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KernelSBOM: Reconstructing Linux Kernel Builds into Trusted SPDX Bills of Materi...

Talkat Linux Plumbers Conference 2025 · 2025-12-11..12-13· [security]
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KernelSBOM reconstructs the Linux kernel build graph by parsing .cmd files to recover exact commands, inputs and outputs, augments that with .S include parsing and a small set of hardcoded dependencies, and produces three interlinked SPDX 3.0 documents (source, build, output) serialized as JSON‑LD. Validation shows a 99.49% overlap with strace and a build-from-referenced-sources success. Limitations include out‑of‑tree source/build distinction, x86/ARM focus, and missing toolchain versioning; plan is to add a kernel make target and capture file hashes and config metadata. reconstructs .cmd files

AI-written summary · about

  1. 0:00Introduction and project overview
  2. 1:49Analyzing kernel build artifacts
  3. 10:33Validating build completeness
  4. 15:26Generating SPDX SBOMs
  5. 24:29Reproducibility and next steps
  6. 27:44Q&A session
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