buck2/20250401-r3: cve remediation

[octo-sts]

buck2/20250401-r3: fix GHSA-xwfj-jgwm-7wp5

Advisory data: https://github.com/wolfi-dev/advisories/blob/main/buck2.advisories.yaml

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[octo-sts]

📦 Build Failed: Missing Dependency

Error: failed reading file: open Cargo.lock: no such file or directory

Build Details

Category	Details
Build System	melange/cargobump
Failure Point	rust/cargobump pipeline step

Root Cause Analysis 🔍

The cargobump tool is attempting to read a Cargo.lock file that does not exist in the current directory. This suggests that either the Cargo.lock file was not generated during the git checkout process, or the working directory is incorrect when cargobump is executed.

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🔍 Build failure fix suggestions

Found similar build failures that have been fixed in the past and analyzed them to suggest a fix:

Similar PRs with fixes

• buck2/20250401-r2: cve remediation #62906
• buck2/20250401-r2: cve remediation #62906
• efs-utils/2.3.3-r0: cve remediation #62912

Suggested Changes

File: buck2.yaml

• addition (After the 'Set up Rust' step and before 'rust/cargobump')
  Original:

  - uses: rust/cargobump

Replacement:

  - name: Generate Cargo.lock
    runs: |
      # Generate Cargo.lock file that cargobump expects
      export PATH="$(dirname "$(rustup which cargo)"):$PATH"
      cd app/buck2
      cargo update --dry-run
      cd ../..

  - uses: rust/cargobump

Content:

Generate Cargo.lock file for cargobump

Click to expand fix analysis

Analysis

The similar fixes all show a consistent pattern: when the cargobump tool fails to find Cargo.lock, the solution involves ensuring the Rust project is properly initialized before running cargobump. In the efs-utils example, the key insight is that a Cargo project needs its dependencies resolved and Cargo.lock generated before cargobump can analyze it. The fixes show that either running cargo commands to generate Cargo.lock or ensuring the working directory context is correct resolves this issue. All examples involved epoch bumps for security patches, but the core technical fix was ensuring Cargo.lock exists when cargobump runs.

Click to expand fix explanation

Explanation

The fix works by ensuring that Cargo.lock exists before the cargobump tool tries to read it. The buck2 project structure shows that the actual Rust code is in the 'app/buck2' subdirectory, not the root. The cargobump tool likely runs from the repository root and expects to find Cargo.lock there. By running 'cargo update --dry-run' in the app/buck2 directory where the Cargo.toml file exists, we generate the Cargo.lock file that describes the dependency tree. The --dry-run flag ensures we don't actually update dependencies, just resolve and lock them. We then return to the root directory so subsequent pipeline steps work correctly. This approach is consistent with the pattern seen in the efs-utils fix where the Cargo project needed proper initialization before cargobump could analyze it.

Click to expand alternative approaches

Alternative Approaches

• Run cargobump from within the app/buck2 directory where Cargo.toml exists instead of the repository root
• Modify the cargobump tool invocation to specify the path to the Cargo.lock file explicitly
• Use 'cargo check' or 'cargo build --dry-run' instead of 'cargo update --dry-run' to generate Cargo.lock
• Copy or symlink the Cargo.lock from app/buck2 to the repository root after generation

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[Ankush-Pathak]

This was remediated by: #64882
Closing this PR as it is now redundant.