Reject invalid integer command-line arguments#281
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July 16, 2026 19:50
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Summary
test-cmdlinetarget for malformed and valid valuesMotivation
The existing
strto*calls did not check whether the entire argument was consumed and, in several cases, narrowed values without a range check. Inputs such as--time_limit 1.5could therefore be silently truncated or leave configured defaults in effect. For resource and cgroup limits, that can make a sandbox less restrictive than the operator intended.The strict helpers are also used for UID/GID input and mapping counts so malformed numeric-looking identities cannot pass through partial conversion.
Fixes #273.
Testing
docker build --target build -t nsjail-strict-cli .docker run --rm nsjail-strict-cli make -C /nsjail test-cmdline/bin/trueclang-format --dry-run --Werroron all changed regions