github-vet / github-vet/rangeloop-pointer-findings
kubernetes/kubernetes: pkg/registry/rbac/rest/storage_rbac.go; 30 LoC
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Description
Found a possible issue in [kubernetes/kubernetes](https://www.github.com/kubernetes/kubernetes) at [pkg/registry/rbac/rest/storage_rbac.go](https://github.com/kubernetes/kubernetes/blob/0eea524c28ea4c0e4a0d2746184f3dc63ff124b9/pkg/registry/rbac/rest/storage_rbac.go#L308-L337)
Below is the message reported by the analyzer for this snippet of code. Beware that the analyzer only reports the first issue it finds, so please do not limit your consideration to the contents of the below message.
> reference to roleBinding was used in a composite literal at line 310
[Click here to see the code in its original context.](https://github.com/kubernetes/kubernetes/blob/0eea524c28ea4c0e4a0d2746184f3dc63ff124b9/pkg/registry/rbac/rest/storage_rbac.go#L308-L337)
Click here to show the 30 line(s) of Go which triggered the analyzer.
```go
for _, roleBinding := range roleBindings {
opts := reconciliation.ReconcileRoleBindingOptions{
RoleBinding: reconciliation.RoleBindingAdapter{RoleBinding: &roleBinding},
Client: reconciliation.RoleBindingClientAdapter{Client: clientset, NamespaceClient: coreclientset.Namespaces()},
Confirm: true,
}
// ServiceUnavailble error is returned when the API server is blocked by storage version updates
err := retryOnConflictOrServiceUnavailable(retry.DefaultBackoff, func() error {
result, err := opts.Run()
if err != nil {
return err
}
switch {
case result.Protected && result.Operation != reconciliation.ReconcileNone:
klog.Warningf("skipped reconcile-protected rolebinding.%s/%s in %v with missing subjects: %v", rbac.GroupName, roleBinding.Name, namespace, result.MissingSubjects)
case result.Operation == reconciliation.ReconcileUpdate:
klog.V(2).Infof("updated rolebinding.%s/%s in %v with additional subjects: %v", rbac.GroupName, roleBinding.Name, namespace, result.MissingSubjects)
case result.Operation == reconciliation.ReconcileCreate:
klog.V(2).Infof("created rolebinding.%s/%s in %v", rbac.GroupName, roleBinding.Name, namespace)
case result.Operation == reconciliation.ReconcileRecreate:
klog.V(2).Infof("recreated rolebinding.%s/%s in %v", rbac.GroupName, roleBinding.Name, namespace)
}
return nil
})
if err != nil {
// don't fail on failures, try to create as many as you can
utilruntime.HandleError(fmt.Errorf("unable to reconcile rolebinding.%s/%s in %v: %v", rbac.GroupName, roleBinding.Name, namespace, err))
failedReconciliation = true
}
}
```
Leave a reaction on this issue to contribute to the project by classifying this instance as a **Bug** :-1:, **Mitigated** :+1:, or **Desirable Behavior** :rocket:
See the descriptions of the classifications [here](https://github.com/github-vet/rangeclosure-findings#how-can-i-help) for more information.
commit ID: 0eea524c28ea4c0e4a0d2746184f3dc63ff124b9
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Research direction
Read pkg/registry/rbac/rest/storage_rbac.go at lines 308-337 and trace how roleBinding is passed into reconciliation.RoleBindingAdapter. Check whether the range-variable reference changes reconciliation behavior across iterations, then look for relevant RBAC reconciliation tests. Done means the analyzer finding is classified with evidence, or a confirmed issue is fixed with regression coverage.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- go
- Domain
- api, authorization, backend
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100