Potential fix for code scanning alert no. 2: Workflow does not contain permissions

[oopsio]

Potential fix for https://github.com/oopsio/nanosha256/security/code-scanning/2

In general, the fix is to add an explicit permissions section that grants only the minimal scopes the workflow needs. This workflow needs to read repository contents for actions/checkout, and there is no indication it needs to write to the repository or interact with issues/PRs, so contents: read is sufficient.

The best minimal change is to add a workflow-level permissions block right after the name: (or before jobs:), so it applies to all jobs by default. Specifically, edit .github/workflows/c-cpp.yml to insert:

permissions:
  contents: read

between the name: C/C++ CI line and the on: block. No other steps, jobs, or behavior need to be modified; this only constrains the implicit GITHUB_TOKEN used by the workflow. No additional imports, libraries, or tooling are required.

Suggested fixes powered by Copilot Autofix. Review carefully before merging.

Summary by CodeRabbit

• Chores
  • Updated internal CI/CD workflow configuration to enhance security permissions.

---

Note: This release contains no user-facing changes. All modifications are internal infrastructure improvements.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 494e9e48-3058-4962-8999-d043ab9707ae

📥 Commits

Reviewing files that changed from the base of the PR and between fdcca18 and 9046496.

📒 Files selected for processing (1)

• .github/workflows/c-cpp.yml

---

📝 Walkthrough

Walkthrough

A permissions block was added to the GitHub Actions workflow file, explicitly setting repository content access to read-only mode. This security configuration restricts the workflow's default permissions without affecting any workflow triggers, jobs, or step definitions.

Changes

Cohort / File(s)	Summary
Workflow Security Configuration .github/workflows/c-cpp.yml	Added top-level permissions block setting contents: read to explicitly restrict workflow access to repository contents.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A lock upon the workflow door,
read permissions, nothing more!
Security tightens, safe and sound,
In rabbit holes, best practices abound! 🔐

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically describes the main change: adding a permissions block to fix a code scanning alert about missing workflow permissions.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch alert-autofix-2

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}