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_capabilities_baseline.go

@@ -0,0 +1,110 @@
+/*
+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"
+)
+
+/*
+Adding NET_RAW or capabilities beyond the default set must be disallowed.
+
+**Restricted Fields:**
+spec.containers[*].securityContext.capabilities.add
+spec.initContainers[*].securityContext.capabilities.add
+
+**Allowed Values:**
+undefined / empty
+values from the default set "AUDIT_WRITE", "CHOWN", "DAC_OVERRIDE","FOWNER", "FSETID", "KILL", "MKNOD", "NET_BIND_SERVICE", "SETFCAP", "SETGID", "SETPCAP", "SETUID", "SYS_CHROOT"
+*/
+
+func init() {
+	addCheck(CheckCapabilitiesBaseline)
+}
+
+const checkCapabilitiesBaselineID CheckID = "capabilities_baseline"
+
+// CheckCapabilitiesBaseline returns a baseline level check
+// that limits the capabilities that can be added in 1.0+
+func CheckCapabilitiesBaseline() Check {
+	return Check{
+		ID:    checkCapabilitiesBaselineID,
+		Level: api.LevelBaseline,
+		Versions: []VersionedCheck{
+			{
+				MinimumVersion: api.MajorMinorVersion(1, 0),
+				CheckPod:       capabilitiesBaseline_1_0,
+			},
+		},
+	}
+}
+
+var (
+	capabilities_allowed_1_0 = sets.NewString(
+		"AUDIT_WRITE",
+		"CHOWN",
+		"DAC_OVERRIDE",
+		"FOWNER",
+		"FSETID",
+		"KILL",
+		"MKNOD",
+		"NET_BIND_SERVICE",
+		"SETFCAP",
+		"SETGID",
+		"SETPCAP",
+		"SETUID",
+		"SYS_CHROOT",
+	)
+)
+
+func capabilitiesBaseline_1_0(podMetadata *metav1.ObjectMeta, podSpec *corev1.PodSpec) CheckResult {
+	var badContainers []string
+	nonDefaultCapabilities := sets.NewString()
+	visitContainers(podSpec, func(container *corev1.Container) {
+		if container.SecurityContext != nil && container.SecurityContext.Capabilities != nil {
+			valid := true
+			for _, c := range container.SecurityContext.Capabilities.Add {
+				if !capabilities_allowed_1_0.Has(string(c)) {
+					valid = false
+					nonDefaultCapabilities.Insert(string(c))
+				}
+			}
+			if !valid {
+				badContainers = append(badContainers, container.Name)
+			}
+		}
+	})
+
+	if len(badContainers) > 0 {
+		return CheckResult{
+			Allowed:         false,
+			ForbiddenReason: "non-default capabilities",
+			ForbiddenDetail: fmt.Sprintf(
+				"%s %s must not include %s in securityContext.capabilities.add",
+				pluralize("container", "containers", len(badContainers)),
+				joinQuote(badContainers),
+				joinQuote(nonDefaultCapabilities.List()),
+			),
+		}
+	}
+	return CheckResult{Allowed: true}
+}