Revert "limit forbidden error to details of what was forbidden"

This reverts commit ecbd013795.

staging/src/k8s.io/apiserver/pkg/endpoints/filters/authorization.go

@@ -73,7 +73,7 @@ func WithAuthorization(handler http.Handler, a authorizer.Authorizer, s runtime.
 		glog.V(4).Infof("Forbidden: %#v, Reason: %q", req.RequestURI, reason)
 		audit.LogAnnotation(ae, decisionAnnotationKey, decisionForbid)
 		audit.LogAnnotation(ae, reasonAnnotationKey, reason)
-		responsewriters.Forbidden(ctx, attributes, w, req, "", s)
+		responsewriters.Forbidden(ctx, attributes, w, req, reason, s)
 	})
 }
 

staging/src/k8s.io/apiserver/pkg/endpoints/filters/impersonation.go

@@ -110,7 +110,7 @@ func WithImpersonation(handler http.Handler, a authorizer.Authorizer, s runtime.
 			decision, reason, err := a.Authorize(actingAsAttributes)
 			if err != nil || decision != authorizer.DecisionAllow {
 				glog.V(4).Infof("Forbidden: %#v, Reason: %s, Error: %v", req.RequestURI, reason, err)
-				responsewriters.Forbidden(ctx, actingAsAttributes, w, req, "", s)
+				responsewriters.Forbidden(ctx, actingAsAttributes, w, req, reason, s)
 				return
 			}
 		}

test/integration/master/synthetic_master_test.go

@@ -175,7 +175,7 @@ func TestStatus(t *testing.T) {
 			statusCode:   http.StatusForbidden,
 			reqPath:      "/apis",
 			reason:       "Forbidden",
-			message:      `forbidden: User "" cannot get path "/apis"`,
+			message:      `forbidden: User "" cannot get path "/apis": Everything is forbidden.`,
 		},
 		{
 			name:         "401",