pkg/ksyms: add more context to kallsyms read errors #3891
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Signed-off-by: Mahe Tardy <[email protected]>
Signed-off-by: Mahe Tardy <[email protected]>
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Users are sometimes bumping against errors when tetragon is trying to read the kallsyms file, let's add more context there so that it's easier to figure what could have gone wrong. For example, recently a user had to figure out that they had 'kernel.kptr_restrict = 2', so the symbols were still given with zero address while still having sufficient permissions which might be confusing. Let's add some hints and guidance. We were previously, most of the time, overwriting the error from the parsing steps with "no symbols found", let's reinject the error here to output more details. Signed-off-by: Mahe Tardy <[email protected]>
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Fixes #3819.
Users are sometimes bumping against errors when tetragon is trying to
read the kallsyms file, let's add more context there so that it's easier
to figure what could have gone wrong. For example, recently a user had
to figure out that they had 'kernel.kptr_restrict = 2', so the symbols
were still given with zero address while still having sufficient
permissions which might be confusing. Let's add some hints and guidance.
We were previously, most of the time, overwriting the error from the
parsing steps with "no symbols found", let's reinject the error here to
output more details.