[RaphaelFakhri]

decodeRelease streams the chunk data into the gzip and JSON decoders through an io.Pipe, but it never closes the read side of the pipe. If decoding stops before the writer goroutine has written all of the chunk data, that goroutine blocks on pw.Write forever and keeps the secret data in memory. This happens when the gzip header is invalid or the JSON payload can't be decoded, for example when a chunk is corrupt or truncated.

Each failed Get, List, or Query leaks one goroutine. An operator that keeps reconciling a release with a corrupt index or chunk secret leaks a goroutine on every attempt.

Changes

• Close the pipe reader with defer pr.Close() when decodeRelease returns. Any pending write then fails with io.ErrClosedPipe and the goroutine exits.
• Add a test that creates an index secret with invalid chunk data, calls Get several times, and checks that no decodeRelease writer goroutines remain.

Successful decodes aren't affected. A probe that ran 20 successful Get calls for each of several release sizes showed no change in the goroutine count before or after the fix.

Testing

go test -race ./pkg/storage/ with envtest assets for Kubernetes 1.35.x:

• Without the fix: 25 passed, 1 failed (Expected <int>: 5 to be zero-valued).
• With the fix: 26 passed. The full go test -race ./... also passes.

Fixes #572

Summary by CodeRabbit

• Bug Fixes
  • Improved cleanup when reading malformed chunked data. If decoding fails before all data is received, the read stream is now closed so background processing can stop rather than remain blocked. Repeated reads of invalid compressed indexes no longer leave lingering decode tasks, helping storage operations release resources reliably.

[coderabbitai]

Walkthrough

decodeRelease now closes the pipe reader when decoding returns. A regression test uses malformed chunk data, repeats failed Get calls, and checks that matching decoder goroutines eventually exit.

Changes: Chunked decode cleanup

Layer / File(s)	Summary
Close the reader and verify cleanup pkg/storage/chunked.go, pkg/storage/chunked_test.go	decodeRelease defers closing the pipe reader. The test checks for remaining decoder goroutines after five failed Get calls using malformed chunk data.

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Medium

Merge Risk: Minimal · up to e1331

The change addresses goroutine retention after failed release decoding and adds focused regression coverage. No actionable merge-blocking risk is identified; merge after normal checks pass.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentat…	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: fixing a goroutine leak during failed chunked release decoding.
Linked Issues check		Issue #572 requires failed chunked release decodes to stop their writer goroutines and release chunk data. In pkg/storage/chunked.go, decodeRelease defers pr.Close(). A blocked pw.Write theref…
Out of Scope Changes check		The changes are limited to the decodeRelease pipe cleanup and a focused regression test with its runtime stack-counting helper. These changes directly support issue #572.

Full details: Linked Issues check

Explanation

Issue #572 requires failed chunked release decodes to stop their writer goroutines and release chunk data. In pkg/storage/chunked.go, decodeRelease defers pr.Close(). A blocked pw.Write therefore returns io.ErrClosedPipe, and the writer goroutine exits. Get, List, and Query use decodeRelease, so the fix covers all three paths. The new Get test uses invalid chunk data, repeats the failure, and waits for matching decode goroutines to reach zero.

Full details: Docstring Coverage

Explanation

Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 1 functions across 2 files.

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

Finishing Touches

Generate unit tests (beta)

• Create a new PR

• Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

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[coderabbitai]

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Failed pre-merge checks:
- Docstring Coverage:
Write docstrings for the functions missing them to satisfy the coverage
threshold.

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Commits

Reviewing files that changed from the base of the PR and between 3722a95 and e1331e0.

Files selected for processing: 2

• pkg/storage/chunked.go
• pkg/storage/chunked_test.go

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[porridge]

I'd try to keep uses of pr together, and put it after the following go func(), right before the gzip.NewReader(pr) call below.

[porridge]

This is a nice way to make sure the fix worked, but I'm afraid it will be fragile. A change to the way stack is formatted, or changing the name of the type or decodeRelease name or structure will invalidate this count, and silently always return 0, rendering the test useless.

I cannot think of a better way to do this, though. So we could either keep it and accept the above, or drop the test before merging given it's fulfilled its primary purpose.