Validate key subscript for metadata.annotations and metadata.labels separately

pkg/apis/core/v1/conversion.go

@@ -28,7 +28,6 @@ import (
 	"k8s.io/apimachinery/pkg/util/validation/field"
 	"k8s.io/kubernetes/pkg/apis/core"
 	"k8s.io/kubernetes/pkg/apis/extensions"
-	"k8s.io/kubernetes/pkg/fieldpath"
 )
 
 // This is a "fast-path" that avoids reflection for common types. It focuses on the objects that are
@@ -157,8 +156,7 @@ func addConversionFuncs(scheme *runtime.Scheme) error {
 	// Add field conversion funcs.
 	err = scheme.AddFieldLabelConversionFunc("v1", "Pod",
 		func(label, value string) (string, string, error) {
-			path, _ := fieldpath.SplitMaybeSubscriptedPath(label)
-			switch path {
+			switch label {
 			case "metadata.name",
 				"metadata.namespace",
 				"spec.nodeName",