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pkhodade-NV
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* fix(mxc): reject a non-absolute wxc_exec_path at gateway startup wxc_exec_path is the binary that builds every sandbox, but nothing validated it before spawning: a relative value (including the shipped default, a bare "wxc-exec.exe") let PATH-lookup or working-directory- relative resolution execute a decoy binary with the gateway's identity instead of the approved wxc-exec, turning the containment mechanism itself into an arbitrary-code-execution primitive. Add MxcComputeConfig::validate_configuration, wired into the existing (previously no-op) compute-driver config preflight, rejecting an empty or non-absolute wxc_exec_path with a clear diagnostic. Change the default from the relative "wxc-exec.exe" to an empty string so the field must be explicitly configured -- no usable-but-insecure fallback survives. Update the architecture doc's stale "else PATH" discovery claim to match. Signed-off-by: Prashant Khodade <pkhodade@nvidia.com> (cherry picked from commit d4192a0072f8f0ca0a4035f10cae07889c2b578f) * test(mxc): cover wxc_exec_path enforcement at the gateway boundary MxcComputeConfig::validate_configuration already had unit coverage, but that only proves the validation function itself is correct -- it says nothing about whether MxcFactory::validate_config (src/lib.rs) still calls it. Before this fix, that factory method discarded the parsed config entirely, so a regression back to that no-op shape would leave every unit test passing while a relative wxc_exec_path again reached gateway startup. Add an integration test that spawns the actual compiled openshell-gateway binary through its config preflight subcommand, exercising the real chain: CLI parsing, TOML loading, driver selection, MxcFactory::validate_config, and MxcComputeConfig::validate_configuration. Assertions check only pass/fail, not message content: run_effective_config_preflight replaces any validation failure with a generic message whenever a config file is used, to keep file-sourced values out of preflight diagnostics -- pre-existing, deliberate, and covered by its own tests. Also document the new required-and-absolute wxc_exec_path constraint in the gateway config reference and the driver README, which previously only showed example values without stating the requirement. Signed-off-by: Prashant Khodade <pkhodade@nvidia.com> --------- Signed-off-by: Prashant Khodade <pkhodade@nvidia.com>