Cleanup resolved object before validating through dry-run

This ensure that we are not going to fail during validation with
dry-run. An example of such a failure would be the following scenario.

- A task in a namespace has `ownerReferences` with
`blockOwnerDeletion: true`
- A user uses the `cluster` resolver to fetch that task
- That user doesn't have a lot of rights in that namespace (only
listing Tasks for example).

/kind bug

Signed-off-by: Vincent Demeester <vdemeest@redhat.com>
(cherry picked from commit d3b18ea)
(cherry picked from commit a89b964)

Author: vdemeester

pkg/reconciler/pipelinerun/resources/pipelineref.go

@@ -136,6 +136,9 @@ func resolvePipeline(ctx context.Context, resolver remote.Resolver, name string,
 func readRuntimeObjectAsPipeline(ctx context.Context, namespace string, obj runtime.Object, k8s kubernetes.Interface, tekton clientset.Interface, refSource *v1.RefSource, verificationPolicies []*v1alpha1.VerificationPolicy) (*v1.Pipeline, *trustedresources.VerificationResult, error) {
 	switch obj := obj.(type) {
 	case *v1beta1.Pipeline:
+		// Cleanup object from things we don't care about
+		// FIXME: extract this in a function
+		obj.ObjectMeta.OwnerReferences = nil
 		// Verify the Pipeline once we fetch from the remote resolution, mutating, validation and conversion of the pipeline should happen after the verification, since signatures are based on the remote pipeline contents
 		vr := trustedresources.VerifyResource(ctx, obj, k8s, refSource, verificationPolicies)
 		// Issue a dry-run request to create the remote Pipeline, so that it can undergo validation from validating admission webhooks
@@ -154,6 +157,9 @@ func readRuntimeObjectAsPipeline(ctx context.Context, namespace string, obj runt
 		}
 		return p, &vr, nil
 	case *v1.Pipeline:
+		// Cleanup object from things we don't care about
+		// FIXME: extract this in a function
+		obj.ObjectMeta.OwnerReferences = nil
 		vr := trustedresources.VerifyResource(ctx, obj, k8s, refSource, verificationPolicies)
 		// Issue a dry-run request to create the remote Pipeline, so that it can undergo validation from validating admission webhooks
 		// without actually creating the Pipeline on the cluster

pkg/reconciler/taskrun/resources/taskref.go

@@ -84,7 +84,8 @@ func GetTaskFuncFromTaskRun(ctx context.Context, k8s kubernetes.Interface, tekto
 // a remote image to fetch the  reference. It will also return the "kind" of the task being referenced.
 // OCI bundle and remote resolution tasks will be verified by trusted resources if the feature is enabled
 func GetTaskFunc(ctx context.Context, k8s kubernetes.Interface, tekton clientset.Interface, requester remoteresource.Requester,
-	owner kmeta.OwnerRefable, tr *v1.TaskRef, trName string, namespace, saName string, verificationPolicies []*v1alpha1.VerificationPolicy) GetTask {
+	owner kmeta.OwnerRefable, tr *v1.TaskRef, trName string, namespace, saName string, verificationPolicies []*v1alpha1.VerificationPolicy,
+) GetTask {
 	kind := v1.NamespacedTaskKind
 	if tr != nil && tr.Kind != "" {
 		kind = tr.Kind
@@ -172,6 +173,9 @@ func resolveStepAction(ctx context.Context, resolver remote.Resolver, name, name
 	}
 	switch obj := obj.(type) { //nolint:gocritic
 	case *v1alpha1.StepAction:
+		// Cleanup object from things we don't care about
+		// FIXME: extract this in a function
+		obj.ObjectMeta.OwnerReferences = nil
 		if err := apiserver.DryRunValidate(ctx, namespace, obj, tekton); err != nil {
 			return nil, nil, err
 		}
@@ -192,6 +196,9 @@ func resolveStepAction(ctx context.Context, resolver remote.Resolver, name, name
 func readRuntimeObjectAsTask(ctx context.Context, namespace string, obj runtime.Object, k8s kubernetes.Interface, tekton clientset.Interface, refSource *v1.RefSource, verificationPolicies []*v1alpha1.VerificationPolicy) (*v1.Task, *trustedresources.VerificationResult, error) {
 	switch obj := obj.(type) {
 	case *v1beta1.Task:
+		// Cleanup object from things we don't care about
+		// FIXME: extract this in a function
+		obj.ObjectMeta.OwnerReferences = nil
 		// Verify the Task once we fetch from the remote resolution, mutating, validation and conversion of the task should happen after the verification, since signatures are based on the remote task contents
 		vr := trustedresources.VerifyResource(ctx, obj, k8s, refSource, verificationPolicies)
 		// Issue a dry-run request to create the remote Task, so that it can undergo validation from validating admission webhooks
@@ -210,6 +217,9 @@ func readRuntimeObjectAsTask(ctx context.Context, namespace string, obj runtime.
 		}
 		return t, &vr, nil
 	case *v1beta1.ClusterTask:
+		// Cleanup object from things we don't care about
+		// FIXME: extract this in a function
+		obj.ObjectMeta.OwnerReferences = nil
 		t, err := convertClusterTaskToTask(ctx, *obj)
 		// Issue a dry-run request to create the remote Task, so that it can undergo validation from validating admission webhooks
 		// without actually creating the Task on the cluster
@@ -218,6 +228,9 @@ func readRuntimeObjectAsTask(ctx context.Context, namespace string, obj runtime.
 		}
 		return t, nil, err
 	case *v1.Task:
+		// Cleanup object from things we don't care about
+		// FIXME: extract this in a function
+		obj.ObjectMeta.OwnerReferences = nil
 		vr := trustedresources.VerifyResource(ctx, obj, k8s, refSource, verificationPolicies)
 		// Issue a dry-run request to create the remote Task, so that it can undergo validation from validating admission webhooks
 		// without actually creating the Task on the cluster