rebase: update kubernetes to v1.25.0

update kubernetes to latest v1.25.0
release.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/pod-security-admission/policy/check_procMount.go

@@ -0,0 +1,91 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package policy
+
+import (
+	"fmt"
+
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/sets"
+	"k8s.io/pod-security-admission/api"
+)
+
+/*
+
+The default /proc masks are set up to reduce attack surface, and should be required.
+
+**Restricted Fields:**
+spec.containers[*].securityContext.procMount
+spec.initContainers[*].securityContext.procMount
+
+**Allowed Values:** undefined/null, "Default"
+
+*/
+
+func init() {
+	addCheck(CheckProcMount)
+}
+
+// CheckProcMount returns a baseline level check that restricts
+// setting the value of securityContext.procMount to DefaultProcMount
+// in 1.0+
+func CheckProcMount() Check {
+	return Check{
+		ID:    "procMount",
+		Level: api.LevelBaseline,
+		Versions: []VersionedCheck{
+			{
+				MinimumVersion: api.MajorMinorVersion(1, 0),
+				CheckPod:       procMount_1_0,
+			},
+		},
+	}
+}
+
+func procMount_1_0(podMetadata *metav1.ObjectMeta, podSpec *corev1.PodSpec) CheckResult {
+	var badContainers []string
+	forbiddenProcMountTypes := sets.NewString()
+	visitContainers(podSpec, func(container *corev1.Container) {
+		// allow if the security context is nil.
+		if container.SecurityContext == nil {
+			return
+		}
+		// allow if proc mount is not set.
+		if container.SecurityContext.ProcMount == nil {
+			return
+		}
+		// check if the value of the proc mount type is valid.
+		if *container.SecurityContext.ProcMount != corev1.DefaultProcMount {
+			badContainers = append(badContainers, container.Name)
+			forbiddenProcMountTypes.Insert(string(*container.SecurityContext.ProcMount))
+		}
+	})
+	if len(badContainers) > 0 {
+		return CheckResult{
+			Allowed:         false,
+			ForbiddenReason: "procMount",
+			ForbiddenDetail: fmt.Sprintf(
+				"%s %s must not set securityContext.procMount to %s",
+				pluralize("container", "containers", len(badContainers)),
+				joinQuote(badContainers),
+				joinQuote(forbiddenProcMountTypes.List()),
+			),
+		}
+	}
+	return CheckResult{Allowed: true}
+}