btf: fix race when loading cached kernel (module)? spec#1848
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lmb merged 1 commit intocilium:mainfrom Aug 15, 2025
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When going from the fast read path to the slow write path, another thread may have already loaded the desired spec. This can cause loading the kernel spec twice, but also issues like rebasing a decoder from a base to another with the same content (both kernel spec) but different addresses. Signed-off-by: Paul Cacheux <[email protected]>
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When going from the fast read path to the slow write path, another thread may have already loaded the desired spec.
This can cause loading the kernel spec twice, but also issues like rebasing a decoder from a base to another with the same content (both kernel spec) but different addresses (the check is done here) which fails, preventing the loading of valid programs.