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v1.5 sandbox regression: bwrap loopback fails on GitHub Actions runner #88

@einarluha-a11y

Description

@einarluha-a11y

Symptom

When pinning uses: openai/codex-action@v1.5 (instead of @v1), the action posts a comment on the PR saying it cannot read any files:

Не могу выполнить ревью в текущей сессии: любые локальные команды (`git diff`, `cat`, даже `pwd`) падают с ошибкой песочницы:

bwrap: loopback: Failed RTM_NEWADDR: Operation not permitted

So Codex returns a comment but cannot inspect the diff at all → no actual review.

Reproduction

  1. Pin openai/codex-action@v1.5 in any workflow
  2. Open a PR
  3. Codex runs, posts the bwrap error message instead of a real review

@v1 (which currently floats to whatever pre-1.5 release was last published) works fine on the same repo, same runner.

Environment

  • GitHub-hosted ubuntu-latest runner
  • Triggered on pull_request event
  • Repository is private
  • Same workflow file works on @v1

Expected

v1.5 should be a non-breaking minor bump — but the bwrap sandbox cannot initialise its loopback interface, so the codex CLI inside cannot exec local commands.

Workaround

Stay on @v1 until v1.6 fixes the sandbox setup.

Related

  • Workflow file: standard pull_request trigger with openai/codex-action step
  • Problem appeared the moment we changed only the uses: line from @v1 to @v1.5, then disappeared after revert.

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