Merge pull request #97966 from saschagrunert/apparmor-init-unconfined

Remove AppArmor loaded profile validation

pkg/security/apparmor/validate.go

@@ -73,14 +73,9 @@ func (v *validator) Validate(pod *v1.Pod) error {
 		return v.validateHostErr
 	}
 
-	loadedProfiles, err := v.getLoadedProfiles()
-	if err != nil {
-		return fmt.Errorf("could not read loaded profiles: %v", err)
-	}
-
 	var retErr error
 	podutil.VisitContainers(&pod.Spec, podutil.AllContainers, func(container *v1.Container, containerType podutil.ContainerType) bool {
-		retErr = validateProfile(GetProfileName(pod, container.Name), loadedProfiles)
+		retErr = ValidateProfileFormat(GetProfileName(pod, container.Name))
 		if retErr != nil {
 			return false
 		}
@@ -119,22 +114,6 @@ func validateHost(runtime string) error {
 	return nil
 }
 
-// Verify that the profile is valid and loaded.
-func validateProfile(profile string, loadedProfiles map[string]bool) error {
-	if err := ValidateProfileFormat(profile); err != nil {
-		return err
-	}
-
-	if strings.HasPrefix(profile, v1.AppArmorBetaProfileNamePrefix) {
-		profileName := strings.TrimPrefix(profile, v1.AppArmorBetaProfileNamePrefix)
-		if !loadedProfiles[profileName] {
-			return fmt.Errorf("profile %q is not loaded", profileName)
-		}
-	}
-
-	return nil
-}
-
 // ValidateProfileFormat checks the format of the profile.
 func ValidateProfileFormat(profile string) error {
 	if profile == "" || profile == v1.AppArmorBetaProfileRuntimeDefault || profile == v1.AppArmorBetaProfileNameUnconfined {
@@ -146,40 +125,6 @@ func ValidateProfileFormat(profile string) error {
 	return nil
 }
 
-func (v *validator) getLoadedProfiles() (map[string]bool, error) {
-	profilesPath := path.Join(v.appArmorFS, "profiles")
-	profilesFile, err := os.Open(profilesPath)
-	if err != nil {
-		return nil, fmt.Errorf("failed to open %s: %v", profilesPath, err)
-	}
-	defer profilesFile.Close()
-
-	profiles := map[string]bool{}
-	scanner := bufio.NewScanner(profilesFile)
-	for scanner.Scan() {
-		profileName := parseProfileName(scanner.Text())
-		if profileName == "" {
-			// Unknown line format; skip it.
-			continue
-		}
-		profiles[profileName] = true
-	}
-	return profiles, nil
-}
-
-// The profiles file is formatted with one profile per line, matching a form:
-//   namespace://profile-name (mode)
-//   profile-name (mode)
-// Where mode is {enforce, complain, kill}. The "namespace://" is only included for namespaced
-// profiles. For the purposes of Kubernetes, we consider the namespace part of the profile name.
-func parseProfileName(profileLine string) string {
-	modeIndex := strings.IndexRune(profileLine, '(')
-	if modeIndex < 0 {
-		return ""
-	}
-	return strings.TrimSpace(profileLine[:modeIndex])
-}
-
 func getAppArmorFS() (string, error) {
 	mountsFile, err := os.Open("/proc/mounts")
 	if err != nil {

pkg/security/apparmor/validate_test.go

@@ -21,7 +21,7 @@ import (
 	"fmt"
 	"testing"
 
-	"k8s.io/api/core/v1"
+	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 
 	"github.com/stretchr/testify/assert"
@@ -47,16 +47,7 @@ func TestValidateHost(t *testing.T) {
 	assert.Error(t, validateHost("rkt"))
 }
 
-func TestValidateProfile(t *testing.T) {
-	loadedProfiles := map[string]bool{
-		"docker-default": true,
-		"foo-bar":        true,
-		"baz":            true,
-		"/usr/sbin/ntpd": true,
-		"/usr/lib/connman/scripts/dhclient-script":      true,
-		"/usr/lib/NetworkManager/nm-dhcp-client.action": true,
-		"/usr/bin/evince-previewer//sanitized_helper":   true,
-	}
+func TestValidateProfileFormat(t *testing.T) {
 	tests := []struct {
 		profile     string
 		expectValid bool
@@ -67,12 +58,10 @@ func TestValidateProfile(t *testing.T) {
 		{"baz", false}, // Missing local prefix.
 		{v1.AppArmorBetaProfileNamePrefix + "/usr/sbin/ntpd", true},
 		{v1.AppArmorBetaProfileNamePrefix + "foo-bar", true},
-		{v1.AppArmorBetaProfileNamePrefix + "unloaded", false}, // Not loaded.
-		{v1.AppArmorBetaProfileNamePrefix + "", false},
 	}
 
 	for _, test := range tests {
-		err := validateProfile(test.profile, loadedProfiles)
+		err := ValidateProfileFormat(test.profile)
 		if test.expectValid {
 			assert.NoError(t, err, "Profile %s should be valid", test.profile)
 		} else {
@@ -121,8 +110,6 @@ func TestValidateValidHost(t *testing.T) {
 		{v1.AppArmorBetaProfileNamePrefix + "foo-container", true},
 		{v1.AppArmorBetaProfileNamePrefix + "/usr/sbin/ntpd", true},
 		{"docker-default", false},
-		{v1.AppArmorBetaProfileNamePrefix + "foo", false},
-		{v1.AppArmorBetaProfileNamePrefix + "", false},
 	}
 
 	for _, test := range tests {
@@ -155,23 +142,6 @@ func TestValidateValidHost(t *testing.T) {
 		},
 	}
 	assert.NoError(t, v.Validate(pod), "Multi-container pod should validate")
-	for k, val := range pod.Annotations {
-		pod.Annotations[k] = val + "-bad"
-		assert.Error(t, v.Validate(pod), fmt.Sprintf("Multi-container pod with invalid profile %s:%s", k, pod.Annotations[k]))
-		pod.Annotations[k] = val // Restore.
-	}
-}
-
-func TestParseProfileName(t *testing.T) {
-	tests := []struct{ line, expected string }{
-		{"foo://bar/baz (kill)", "foo://bar/baz"},
-		{"foo-bar (enforce)", "foo-bar"},
-		{"/usr/foo/bar/baz (complain)", "/usr/foo/bar/baz"},
-	}
-	for _, test := range tests {
-		name := parseProfileName(test.line)
-		assert.Equal(t, test.expected, name, "Parsing %s", test.line)
-	}
 }
 
 func getPodWithProfile(profile string) *v1.Pod {