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internal/exec/stages/files: resolve intermediate symlinks in relabel paths - #2316
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: Path: .coderabbit.yaml Review profile: CHILL Plan: Team Run ID: 📒 Files selected for processing (1)
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📝 WalkthroughWalkthroughThe passwd stage now follows intermediate symlinks in home directory paths before checking and relabeling them. The release notes document the fix for OSTree-based platforms. ChangesHome directory relabeling
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🟡 Moderate · up to Relabel path handling can produce incorrect paths or panic for non-canonical destination directories, so the current change should not merge until this bounded correctness risk is fixed or explicitly accepted. Suggested reviewers: 🚥 Pre-merge checks | ✅ 6✅ Passed checks (6 passed)
Full details: Title checkExplanation The title follows the required format, uses the correct subsystem, starts the description with lowercase text, uses imperative mood, and has no trailing period. It accurately describes the main change. Full details: Docstring CoverageExplanation No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1 files. (1 skipped: 1 unsupported.) Full details: Commit Message ConventionExplanation The PR contains one non-merge commit. Its subject is ✨ Finishing Touches🧪 Generate unit tests (beta)
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Binary size report (
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| Size | |
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Base (main) |
33MiB |
| PR (#2316) | 33MiB |
| Delta | +0B (0.00%) |
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Actionable comments posted: 1
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Inline comments:
In `@internal/exec/stages/files/passwd.go`:
- Line 90: Update the path handling around resolvedPath and DestDir in
files.creator.Create to avoid raw string-length slicing; normalize DestDir
before joining or derive the relative path with validated filepath.Rel,
preserving correct behavior for canonical and non-canonical roots without
slice-bounds panics. Add regression coverage for a non-canonical --root value.
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internal/exec/stages/files/passwd.go
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⏰ Context from checks skipped due to timeout. (9)
- GitHub Check: Build butane container image
- GitHub Check: Test (1.25.x)
- GitHub Check: Test (1.26.x)
- GitHub Check: Build container image
- GitHub Check: Check binary size
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- GitHub Check: Shellcheck
- GitHub Check: Test ignition-validate (1.26.x, macos-latest)
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⚠️ CI failures not shown inline (2)
GitHub Actions: Release notes / 0_Require release note.txt: internal/exec/stages/files: resolve intermediate symlinks in relabel paths
Conclusion: failure
##[group]Run set -euo pipefail
�[36;1mset -euo pipefail�[0m
�[36;1mif [ -n "skip-notes" ]; then�[0m
�[36;1m # Don't trust the label list in the event metadata, since runs�[0m
�[36;1m # can be scheduled out of order and the list might be stale.�[0m
�[36;1m label=$(curl --no-progress-meter \�[0m
�[36;1m -H "Accept: application/vnd.github+json" \�[0m
�[36;1m -H "Authorization: token ***" \�[0m
�[36;1m "https://api.github.com/repos/coreos/ignition/pulls/2316" |�[0m
�[36;1m jq '.labels[] | select(.name == "skip-notes")')�[0m
�[36;1m if [ -n "${label}" ]; then�[0m
�[36;1m echo "PR has skip-notes label; skipping"�[0m
�[36;1m exit 0�[0m
�[36;1m fi�[0m
�[36;1mfi�[0m
�[36;1mdiffinfo=$(curl --no-progress-meter \�[0m
�[36;1m -H "Accept: application/vnd.github+json" \�[0m
�[36;1m -H "Authorization: token ***" \�[0m
�[36;1m "https://api.github.com/repos/coreos/ignition/compare/ade39b435a73689a3a854037585d9dcb913fc86c...1b04f9ed8ca428d0124f3046add66835de5f5155" |�[0m
�[36;1m jq '.files[] | select(.filename == "docs/release-notes.md")')�[0m
�[36;1mif [ -z "${diffinfo}" ]; then�[0m
�[36;1m echo "Found no changes to docs/release-notes.md."�[0m
�[36;1m if [ -n "skip-notes" ]; then�[0m
�[36;1m echo "To ignore, add skip-notes label to PR."�[0m
�[36;1m fi�[0m
�[36;1m exit 1�[0m
�[36;1mfi�[0m
�[36;1mecho "Found change to docs/release-notes.md."�[0m
shell: /usr/bin/bash --noprofile --norc -e -o pipefail {0}
##[endgroup]
Found no changes to docs/release-notes.md.
To ignore, add skip-notes label to PR.
##[error]Process completed with exit code 1.
GitHub Actions: Release notes / Require release note: internal/exec/stages/files: resolve intermediate symlinks in relabel paths
Conclusion: failure
##[group]Run set -euo pipefail
�[36;1mset -euo pipefail�[0m
�[36;1mif [ -n "skip-notes" ]; then�[0m
�[36;1m # Don't trust the label list in the event metadata, since runs�[0m
�[36;1m # can be scheduled out of order and the list might be stale.�[0m
�[36;1m label=$(curl --no-progress-meter \�[0m
�[36;1m -H "Accept: application/vnd.github+json" \�[0m
�[36;1m -H "Authorization: token ***" \�[0m
�[36;1m "https://api.github.com/repos/coreos/ignition/pulls/2316" |�[0m
�[36;1m jq '.labels[] | select(.name == "skip-notes")')�[0m
�[36;1m if [ -n "${label}" ]; then�[0m
�[36;1m echo "PR has skip-notes label; skipping"�[0m
�[36;1m exit 0�[0m
�[36;1m fi�[0m
�[36;1mfi�[0m
�[36;1mdiffinfo=$(curl --no-progress-meter \�[0m
�[36;1m -H "Accept: application/vnd.github+json" \�[0m
�[36;1m -H "Authorization: token ***" \�[0m
�[36;1m "https://api.github.com/repos/coreos/ignition/compare/ade39b435a73689a3a854037585d9dcb913fc86c...1b04f9ed8ca428d0124f3046add66835de5f5155" |�[0m
�[36;1m jq '.files[] | select(.filename == "docs/release-notes.md")')�[0m
�[36;1mif [ -z "${diffinfo}" ]; then�[0m
�[36;1m echo "Found no changes to docs/release-notes.md."�[0m
�[36;1m if [ -n "skip-notes" ]; then�[0m
�[36;1m echo "To ignore, add skip-notes label to PR."�[0m
�[36;1m fi�[0m
�[36;1m exit 1�[0m
�[36;1mfi�[0m
�[36;1mecho "Found change to docs/release-notes.md."�[0m
shell: /usr/bin/bash --noprofile --norc -e -o pipefail {0}
##[endgroup]
Found no changes to docs/release-notes.md.
To ignore, add skip-notes label to PR.
##[error]Process completed with exit code 1.
🧰 Additional context used
📓 Path-based instructions (4)
Execution stages are fixed (fetch-offline, fetch, disks, mount, files, umount). External projects hardcode this list. Do not add or remove stages. Config must be declarative -- describe desired state, not actions.
⚙️ CodeRabbit configuration file
Files:
internal/exec/stages/files/passwd.go
7. **Execution stages are fixed** (fetch-offline, fetch, disks, mount, files, umount). External projects hardcode this list.
📄 CodeRabbit inference engine (AGENTS.md)
Files:
internal/exec/stages/files/passwd.go
- **Naming**: PascalCase exported, camelCase unexported, snake_case filenames
📄 CodeRabbit inference engine (AGENTS.md)
Files:
internal/exec/stages/files/passwd.go
- **Formatting**: `gofmt` enforced (CI and `./test`)
📄 CodeRabbit inference engine (AGENTS.md)
Files:
internal/exec/stages/files/passwd.go
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Added a release note. And looks like the TMT CI will need the same fix as coreos/afterburn#1300 |
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Opened #2317 for the TMT CI |
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LGTM, thank you @Rolv-Apneseth, once you rebase it with the tmt test update I think we can merge. |
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Rebased, thanks @prestist |
…paths Due to a recent libselinux (3.11) update in the next/testing streams of FCOS, Software Factory nodes started failing provisioning. They had a home_dir: /home/zuul-worker defined in their butane config and were failing with a relabelling issue. With the 3.11 update (including SELinuxProject/selinux@67bc978), lstat() was replaced with safe_open() using O_NOFOLLOW on intermediate path components. This ended up exposing a latent bug in Ignition since only the final component was being resolved via ResolveSymlink(), so /home/user (where /home -> var/home on ostree) is passed unresolved. setfiles no longer resolves for us, leading to the failures. Avoid this issue by using JoinPath() to resolve intermediate symlinks in directory paths before passing them to setfiles for SELinux relabelling.
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Adjusted the commit to mention |
Due to a recent policycoreutils (3.11) update in the next/testing streams of FCOS, Software Factory nodes started failing provisioning.
They had a home_dir: /home/zuul-worker defined in their butane config and were failing with a relabelling issue. With the 3.11 update (including
SELinuxProject/selinux@67bc978), lstat() was replaced with safe_open() using O_NOFOLLOW on intermediate path components. This ended up exposing a latent bug in Ignition since only the final component was being resolved via ResolveSymlink(), so /home/user (where /home -> var/home on ostree) is passed unresolved. setfiles no longer resolves for us, leading to the failures.
Avoid this issue by using JoinPath() to resolve intermediate symlinks in directory paths before passing them to setfiles for SELinux relabelling.
Disclaimer: assisted by an LLM