Harden program-cache permissions, binary-path resolution, and coredump helper lifetime#2399

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rparolin wants to merge 10 commits into

NVIDIA:mainfrom

rparolin:hardening/cache-perms-loader-coredump

Commits on Jul 21, 2026

Harden program-cache perms, binary-path resolution, and coredump helper lifetime

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Simplify code comments on the hardening fixes

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Remove agent_authored markers from the new tests

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Remove weak coredump buffer-lifetime test

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Silence bandit S103 on the intentionally world-writable test dir

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test: expect absolutized binary path on Windows

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Raise on out-of-range c_int/c_byte kernel arguments instead of truncating

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param_packer: use PyLong_AsInt for c_int range check on Python 3.13+

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param_packer: unify c_int/c_byte range check via PyLong_AsLongAndOverflow

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Split kernel-arg overflow change (#363) into its own PR (#2402)

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