update selinux to b6fa367

Signed-off-by: Yanqiang Miao <miao.yanqiang@zte.com.cn>

pkg/server/helpers.go

@@ -371,8 +371,7 @@ func initSelinuxOpts(selinuxOpt *runtime.SELinuxOption) (string, string, error)
 	// Should ignored selinuxOpts if they are incomplete.
 	if selinuxOpt.GetUser() == "" ||
 		selinuxOpt.GetRole() == "" ||
-		selinuxOpt.GetType() == "" ||
-		selinuxOpt.GetLevel() == "" {
+		selinuxOpt.GetType() == "" {
 		return "", "", nil
 	}
 
@@ -391,6 +390,10 @@ func initSelinuxOpts(selinuxOpt *runtime.SELinuxOption) (string, string, error)
 }
 
 func checkSelinuxLevel(level string) (bool, error) {
+	if len(level) == 0 {
+		return true, nil
+	}
+
 	matched, err := regexp.MatchString(`^s\d(-s\d)??(:c\d{1,4}((.c\d{1,4})?,c\d{1,4})*(.c\d{1,4})?(,c\d{1,4}(.c\d{1,4})?)*)?$`, level)
 	if err != nil || !matched {
 		return false, fmt.Errorf("the format of 'level' %q is not correct: %v", level, err)

pkg/server/helpers_selinux_test.go

@@ -19,6 +19,7 @@ limitations under the License.
 package server
 
 import (
+	"strings"
 	"testing"
 
 	"github.com/opencontainers/selinux/go-selinux"
@@ -62,6 +63,16 @@ func TestInitSelinuxOpts(t *testing.T) {
 			processLabel: "user_u:user_r:user_t:s0:c1,c2",
 			mountLabels:  []string{"user_u:object_r:container_file_t:s0:c1,c2", "user_u:object_r:svirt_sandbox_file_t:s0:c1,c2"},
 		},
+		"Should be resolved correctly when selinuxOpt has been initialized with level=''": {
+			selinuxOpt: &runtime.SELinuxOption{
+				User:  "user_u",
+				Role:  "user_r",
+				Type:  "user_t",
+				Level: "",
+			},
+			processLabel: "user_u:user_r:user_t:s0",
+			mountLabels:  []string{"user_u:object_r:container_file_t:s0", "user_u:object_r:svirt_sandbox_file_t:s0"},
+		},
 		"Should return error when the format of 'level' is not correct": {
 			selinuxOpt: &runtime.SELinuxOption{
 				User:  "user_u",
@@ -78,8 +89,15 @@ func TestInitSelinuxOpts(t *testing.T) {
 				assert.Error(t, err)
 			} else {
 				assert.NoError(t, err)
-				assert.Equal(t, test.processLabel, processLabel)
-				assert.Contains(t, test.mountLabels, mountLabel)
+				if test.selinuxOpt == nil || test.selinuxOpt.Level != "" {
+					assert.Equal(t, test.processLabel, processLabel)
+					assert.Contains(t, test.mountLabels, mountLabel)
+				} else {
+					assert.Equal(t, 0, strings.LastIndex(processLabel, test.processLabel))
+					contain := strings.LastIndex(mountLabel, test.mountLabels[0]) == 0 ||
+						strings.LastIndex(mountLabel, test.mountLabels[1]) == 0
+					assert.True(t, contain)
+				}
 			}
 		})
 	}

vendor.conf

@@ -43,7 +43,7 @@ github.com/opencontainers/image-spec v1.0.1
 github.com/opencontainers/runc 69663f0bd4b60df09991c08812a60108003fa340
 github.com/opencontainers/runtime-spec v1.0.1
 github.com/opencontainers/runtime-tools v0.6.0
-github.com/opencontainers/selinux 4a2974bf1ee960774ffd517717f1f45325af0206
+github.com/opencontainers/selinux b6fa367ed7f534f9ba25391cc2d467085dbb445a
 github.com/pkg/errors v0.8.0
 github.com/pmezard/go-difflib v1.0.0
 github.com/prometheus/client_golang f4fb1b73fb099f396a7f0036bf86aa8def4ed823

vendor/github.com/opencontainers/selinux/go-selinux/label/label_selinux.go

@@ -49,8 +49,10 @@ func InitLabels(options []string) (string, string, error) {
 				mcon[con[0]] = con[1]
 			}
 		}
+		_ = ReleaseLabel(processLabel)
 		processLabel = pcon.Get()
 		mountLabel = mcon.Get()
+		_ = ReserveLabel(processLabel)
 	}
 	return processLabel, mountLabel, nil
 }
@@ -85,9 +87,6 @@ func FormatMountLabel(src, mountLabel string) string {
 // SetProcessLabel takes a process label and tells the kernel to assign the
 // label to the next program executed by the current process.
 func SetProcessLabel(processLabel string) error {
-	if processLabel == "" {
-		return nil
-	}
 	return selinux.SetExecLabel(processLabel)
 }
 
@@ -131,7 +130,7 @@ func Relabel(path string, fileLabel string, shared bool) error {
 		return nil
 	}
 
-	exclude_paths := map[string]bool{"/": true, "/usr": true, "/etc": true}
+	exclude_paths := map[string]bool{"/": true, "/usr": true, "/etc": true, "/tmp": true, "/home": true, "/run": true, "/var": true, "/root": true}
 	if exclude_paths[path] {
 		return fmt.Errorf("SELinux relabeling of %s is not allowed", path)
 	}

vendor/github.com/opencontainers/selinux/go-selinux/selinux_linux.go

@@ -1,13 +1,16 @@
-// +build linux
+// +build selinux,linux
 
 package selinux
 
 import (
 	"bufio"
+	"bytes"
 	"crypto/rand"
 	"encoding/binary"
+	"errors"
 	"fmt"
 	"io"
+	"io/ioutil"
 	"os"
 	"path/filepath"
 	"regexp"
@@ -23,14 +26,16 @@ const (
 	// Permissive constant to indicate SELinux is in permissive mode
 	Permissive = 0
 	// Disabled constant to indicate SELinux is disabled
-	Disabled         = -1
+	Disabled = -1
+
 	selinuxDir       = "/etc/selinux/"
 	selinuxConfig    = selinuxDir + "config"
+	selinuxfsMount   = "/sys/fs/selinux"
 	selinuxTypeTag   = "SELINUXTYPE"
 	selinuxTag       = "SELINUX"
-	selinuxPath      = "/sys/fs/selinux"
 	xattrNameSelinux = "security.selinux"
 	stRdOnly         = 0x01
+	selinuxfsMagic   = 0xf97cff8c
 )
 
 type selinuxState struct {
@@ -43,7 +48,13 @@ type selinuxState struct {
 }
 
 var (
+	// ErrMCSAlreadyExists is returned when trying to allocate a duplicate MCS.
+	ErrMCSAlreadyExists = errors.New("MCS label already exists")
+	// ErrEmptyPath is returned when an empty path has been specified.
+	ErrEmptyPath = errors.New("empty path")
+
 	assignRegex = regexp.MustCompile(`^([^=]+)=(.*)$`)
+	roFileLabel string
 	state       = selinuxState{
 		mcsList: make(map[string]bool),
 	}
@@ -91,6 +102,83 @@ func (s *selinuxState) setSELinuxfs(selinuxfs string) string {
 	return s.selinuxfs
 }
 
+func verifySELinuxfsMount(mnt string) bool {
+	var buf syscall.Statfs_t
+	for {
+		err := syscall.Statfs(mnt, &buf)
+		if err == nil {
+			break
+		}
+		if err == syscall.EAGAIN {
+			continue
+		}
+		return false
+	}
+	if uint32(buf.Type) != uint32(selinuxfsMagic) {
+		return false
+	}
+	if (buf.Flags & stRdOnly) != 0 {
+		return false
+	}
+
+	return true
+}
+
+func findSELinuxfs() string {
+	// fast path: check the default mount first
+	if verifySELinuxfsMount(selinuxfsMount) {
+		return selinuxfsMount
+	}
+
+	// check if selinuxfs is available before going the slow path
+	fs, err := ioutil.ReadFile("/proc/filesystems")
+	if err != nil {
+		return ""
+	}
+	if !bytes.Contains(fs, []byte("\tselinuxfs\n")) {
+		return ""
+	}
+
+	// slow path: try to find among the mounts
+	f, err := os.Open("/proc/self/mountinfo")
+	if err != nil {
+		return ""
+	}
+	defer f.Close()
+
+	scanner := bufio.NewScanner(f)
+	for {
+		mnt := findSELinuxfsMount(scanner)
+		if mnt == "" { // error or not found
+			return ""
+		}
+		if verifySELinuxfsMount(mnt) {
+			return mnt
+		}
+	}
+}
+
+// findSELinuxfsMount returns a next selinuxfs mount point found,
+// if there is one, or an empty string in case of EOF or error.
+func findSELinuxfsMount(s *bufio.Scanner) string {
+	for s.Scan() {
+		txt := s.Text()
+		// The first field after - is fs type.
+		// Safe as spaces in mountpoints are encoded as \040
+		if !strings.Contains(txt, " - selinuxfs ") {
+			continue
+		}
+		const mPos = 5 // mount point is 5th field
+		fields := strings.SplitN(txt, " ", mPos+1)
+		if len(fields) < mPos+1 {
+			continue
+		}
+		return fields[mPos-1]
+	}
+
+	return ""
+}
+
 func (s *selinuxState) getSELinuxfs() string {
 	s.Lock()
 	selinuxfs := s.selinuxfs
@@ -100,40 +188,7 @@ func (s *selinuxState) getSELinuxfs() string {
 		return selinuxfs
 	}
 
-	selinuxfs = ""
-	f, err := os.Open("/proc/self/mountinfo")
-	if err != nil {
-		return selinuxfs
-	}
-	defer f.Close()
-
-	scanner := bufio.NewScanner(f)
-	for scanner.Scan() {
-		txt := scanner.Text()
-		// Safe as mountinfo encodes mountpoints with spaces as \040.
-		sepIdx := strings.Index(txt, " - ")
-		if sepIdx == -1 {
-			continue
-		}
-		if !strings.Contains(txt[sepIdx:], "selinuxfs") {
-			continue
-		}
-		fields := strings.Split(txt, " ")
-		if len(fields) < 5 {
-			continue
-		}
-		selinuxfs = fields[4]
-		break
-	}
-
-	if selinuxfs != "" {
-		var buf syscall.Statfs_t
-		syscall.Statfs(selinuxfs, &buf)
-		if (buf.Flags & stRdOnly) == 1 {
-			selinuxfs = ""
-		}
-	}
-	return s.setSELinuxfs(selinuxfs)
+	return s.setSELinuxfs(findSELinuxfs())
 }
 
 // getSelinuxMountPoint returns the path to the mountpoint of an selinuxfs
@@ -150,7 +205,7 @@ func GetEnabled() bool {
 	return state.getEnabled()
 }
 
-func readConfig(target string) (value string) {
+func readConfig(target string) string {
 	var (
 		val, key string
 		bufin    *bufio.Reader
@@ -192,30 +247,42 @@ func readConfig(target string) (value string) {
 }
 
 func getSELinuxPolicyRoot() string {
-	return selinuxDir + readConfig(selinuxTypeTag)
+	return filepath.Join(selinuxDir, readConfig(selinuxTypeTag))
 }
 
-func readCon(name string) (string, error) {
-	var val string
+func readCon(fpath string) (string, error) {
+	if fpath == "" {
+		return "", ErrEmptyPath
+	}
 
-	in, err := os.Open(name)
+	in, err := os.Open(fpath)
 	if err != nil {
 		return "", err
 	}
 	defer in.Close()
 
-	_, err = fmt.Fscanf(in, "%s", &val)
-	return val, err
+	var retval string
+	if _, err := fmt.Fscanf(in, "%s", &retval); err != nil {
+		return "", err
+	}
+	return strings.Trim(retval, "\x00"), nil
 }
 
 // SetFileLabel sets the SELinux label for this path or returns an error.
-func SetFileLabel(path string, label string) error {
-	return lsetxattr(path, xattrNameSelinux, []byte(label), 0)
+func SetFileLabel(fpath string, label string) error {
+	if fpath == "" {
+		return ErrEmptyPath
+	}
+	return lsetxattr(fpath, xattrNameSelinux, []byte(label), 0)
 }
 
 // FileLabel returns the SELinux label for this path or returns an error.
-func FileLabel(path string) (string, error) {
-	label, err := lgetxattr(path, xattrNameSelinux)
+func FileLabel(fpath string) (string, error) {
+	if fpath == "" {
+		return "", ErrEmptyPath
+	}
+
+	label, err := lgetxattr(fpath, xattrNameSelinux)
 	if err != nil {
 		return "", err
 	}
@@ -260,8 +327,12 @@ func ExecLabel() (string, error) {
 	return readCon(fmt.Sprintf("/proc/self/task/%d/attr/exec", syscall.Gettid()))
 }
 
-func writeCon(name string, val string) error {
-	out, err := os.OpenFile(name, os.O_WRONLY, 0)
+func writeCon(fpath string, val string) error {
+	if fpath == "" {
+		return ErrEmptyPath
+	}
+
+	out, err := os.OpenFile(fpath, os.O_WRONLY, 0)
 	if err != nil {
 		return err
 	}
@@ -275,6 +346,37 @@ func writeCon(name string, val string) error {
 	return err
 }
 
+/*
+CanonicalizeContext takes a context string and writes it to the kernel
+the function then returns the context that the kernel will use.  This function
+can be used to see if two contexts are equivalent
+*/
+func CanonicalizeContext(val string) (string, error) {
+	return readWriteCon(filepath.Join(getSelinuxMountPoint(), "context"), val)
+}
+
+func readWriteCon(fpath string, val string) (string, error) {
+	if fpath == "" {
+		return "", ErrEmptyPath
+	}
+	f, err := os.OpenFile(fpath, os.O_RDWR, 0)
+	if err != nil {
+		return "", err
+	}
+	defer f.Close()
+
+	_, err = f.Write([]byte(val))
+	if err != nil {
+		return "", err
+	}
+
+	var retval string
+	if _, err := fmt.Fscanf(f, "%s", &retval); err != nil {
+		return "", err
+	}
+	return strings.Trim(retval, "\x00"), nil
+}
+
 /*
 SetExecLabel sets the SELinux label that the kernel will use for any programs
 that are executed by the current process thread, or an error.
@@ -285,7 +387,10 @@ func SetExecLabel(label string) error {
 
 // Get returns the Context as a string
 func (c Context) Get() string {
-	return fmt.Sprintf("%s:%s:%s:%s", c["user"], c["role"], c["type"], c["level"])
+	if c["level"] != "" {
+		return fmt.Sprintf("%s:%s:%s:%s", c["user"], c["role"], c["type"], c["level"])
+	}
+	return fmt.Sprintf("%s:%s:%s", c["user"], c["role"], c["type"])
 }
 
 // NewContext creates a new Context struct from the specified label
@@ -297,7 +402,9 @@ func NewContext(label string) Context {
 		c["user"] = con[0]
 		c["role"] = con[1]
 		c["type"] = con[2]
-		c["level"] = con[3]
+		if len(con) > 3 {
+			c["level"] = con[3]
+		}
 	}
 	return c
 }
@@ -306,12 +413,14 @@ func NewContext(label string) Context {
 func ReserveLabel(label string) {
 	if len(label) != 0 {
 		con := strings.SplitN(label, ":", 4)
-		mcsAdd(con[3])
+		if len(con) > 3 {
+			mcsAdd(con[3])
+		}
 	}
 }
 
 func selinuxEnforcePath() string {
-	return fmt.Sprintf("%s/enforce", selinuxPath)
+	return fmt.Sprintf("%s/enforce", getSelinuxMountPoint())
 }
 
 // EnforceMode returns the current SELinux mode Enforcing, Permissive, Disabled
@@ -354,16 +463,22 @@ func DefaultEnforceMode() int {
 }
 
 func mcsAdd(mcs string) error {
+	if mcs == "" {
+		return nil
+	}
 	state.Lock()
 	defer state.Unlock()
 	if state.mcsList[mcs] {
-		return fmt.Errorf("MCS Label already exists")
+		return ErrMCSAlreadyExists
 	}
 	state.mcsList[mcs] = true
 	return nil
 }
 
 func mcsDelete(mcs string) {
+	if mcs == "" {
+		return
+	}
 	state.Lock()
 	defer state.Unlock()
 	state.mcsList[mcs] = false
@@ -424,14 +539,14 @@ Allowing it to be used by another process.
 func ReleaseLabel(label string) {
 	if len(label) != 0 {
 		con := strings.SplitN(label, ":", 4)
-		mcsDelete(con[3])
+		if len(con) > 3 {
+			mcsDelete(con[3])
+		}
 	}
 }
 
-var roFileLabel string
-
 // ROFileLabel returns the specified SELinux readonly file label
-func ROFileLabel() (fileLabel string) {
+func ROFileLabel() string {
 	return roFileLabel
 }
 
@@ -497,23 +612,25 @@ func ContainerLabels() (processLabel string, fileLabel string) {
 		roFileLabel = fileLabel
 	}
 exit:
-	mcs := uniqMcs(1024)
 	scon := NewContext(processLabel)
-	scon["level"] = mcs
-	processLabel = scon.Get()
-	scon = NewContext(fileLabel)
-	scon["level"] = mcs
-	fileLabel = scon.Get()
+	if scon["level"] != "" {
+		mcs := uniqMcs(1024)
+		scon["level"] = mcs
+		processLabel = scon.Get()
+		scon = NewContext(fileLabel)
+		scon["level"] = mcs
+		fileLabel = scon.Get()
+	}
 	return processLabel, fileLabel
 }
 
 // SecurityCheckContext validates that the SELinux label is understood by the kernel
 func SecurityCheckContext(val string) error {
-	return writeCon(fmt.Sprintf("%s.context", selinuxPath), val)
+	return writeCon(fmt.Sprintf("%s/context", getSelinuxMountPoint()), val)
 }
 
 /*
-CopyLevel returns a label with the MLS/MCS level from src label replaces on
+CopyLevel returns a label with the MLS/MCS level from src label replaced on
 the dest label.
 */
 func CopyLevel(src, dest string) (string, error) {
@@ -536,20 +653,26 @@ func CopyLevel(src, dest string) (string, error) {
 
 // Prevent users from relabing system files
 func badPrefix(fpath string) error {
-	var badprefixes = []string{"/usr"}
+	if fpath == "" {
+		return ErrEmptyPath
+	}
 
-	for _, prefix := range badprefixes {
-		if fpath == prefix || strings.HasPrefix(fpath, fmt.Sprintf("%s/", prefix)) {
+	badPrefixes := []string{"/usr"}
+	for _, prefix := range badPrefixes {
+		if strings.HasPrefix(fpath, prefix) {
 			return fmt.Errorf("relabeling content in %s is not allowed", prefix)
 		}
 	}
 	return nil
 }
 
-// Chcon changes the fpath file object to the SELinux label label.
-// If the fpath is a directory and recurse is true Chcon will walk the
-// directory tree setting the label
+// Chcon changes the `fpath` file object to the SELinux label `label`.
+// If `fpath` is a directory and `recurse`` is true, Chcon will walk the
+// directory tree setting the label.
 func Chcon(fpath string, label string, recurse bool) error {
+	if fpath == "" {
+		return ErrEmptyPath
+	}
 	if label == "" {
 		return nil
 	}
@@ -568,7 +691,7 @@ func Chcon(fpath string, label string, recurse bool) error {
 }
 
 // DupSecOpt takes an SELinux process label and returns security options that
-// can will set the SELinux Type and Level for future container processes
+// can be used to set the SELinux Type and Level for future container processes.
 func DupSecOpt(src string) []string {
 	if src == "" {
 		return nil
@@ -576,18 +699,23 @@ func DupSecOpt(src string) []string {
 	con := NewContext(src)
 	if con["user"] == "" ||
 		con["role"] == "" ||
-		con["type"] == "" ||
-		con["level"] == "" {
+		con["type"] == "" {
 		return nil
 	}
-	return []string{"user:" + con["user"],
+	dup := []string{"user:" + con["user"],
 		"role:" + con["role"],
 		"type:" + con["type"],
-		"level:" + con["level"]}
+	}
+
+	if con["level"] != "" {
+		dup = append(dup, "level:"+con["level"])
+	}
+
+	return dup
 }
 
-// DisableSecOpt returns a security opt that can be used to disabling SELinux
-// labeling support for future container processes
+// DisableSecOpt returns a security opt that can be used to disable SELinux
+// labeling support for future container processes.
 func DisableSecOpt() []string {
 	return []string{"disable"}
 }

vendor/github.com/opencontainers/selinux/go-selinux/selinux_stub.go

@@ -0,0 +1,188 @@
+// +build !selinux
+
+package selinux
+
+import (
+	"errors"
+)
+
+const (
+	// Enforcing constant indicate SELinux is in enforcing mode
+	Enforcing = 1
+	// Permissive constant to indicate SELinux is in permissive mode
+	Permissive = 0
+	// Disabled constant to indicate SELinux is disabled
+	Disabled = -1
+)
+
+var (
+	// ErrMCSAlreadyExists is returned when trying to allocate a duplicate MCS.
+	ErrMCSAlreadyExists = errors.New("MCS label already exists")
+	// ErrEmptyPath is returned when an empty path has been specified.
+	ErrEmptyPath = errors.New("empty path")
+)
+
+// Context is a representation of the SELinux label broken into 4 parts
+type Context map[string]string
+
+// SetDisabled disables selinux support for the package
+func SetDisabled() {
+	return
+}
+
+// GetEnabled returns whether selinux is currently enabled.
+func GetEnabled() bool {
+	return false
+}
+
+// SetFileLabel sets the SELinux label for this path or returns an error.
+func SetFileLabel(fpath string, label string) error {
+	return nil
+}
+
+// FileLabel returns the SELinux label for this path or returns an error.
+func FileLabel(fpath string) (string, error) {
+	return "", nil
+}
+
+/*
+SetFSCreateLabel tells kernel the label to create all file system objects
+created by this task. Setting label="" to return to default.
+*/
+func SetFSCreateLabel(label string) error {
+	return nil
+}
+
+/*
+FSCreateLabel returns the default label the kernel which the kernel is using
+for file system objects created by this task. "" indicates default.
+*/
+func FSCreateLabel() (string, error) {
+	return "", nil
+}
+
+// CurrentLabel returns the SELinux label of the current process thread, or an error.
+func CurrentLabel() (string, error) {
+	return "", nil
+}
+
+// PidLabel returns the SELinux label of the given pid, or an error.
+func PidLabel(pid int) (string, error) {
+	return "", nil
+}
+
+/*
+ExecLabel returns the SELinux label that the kernel will use for any programs
+that are executed by the current process thread, or an error.
+*/
+func ExecLabel() (string, error) {
+	return "", nil
+}
+
+/*
+CanonicalizeContext takes a context string and writes it to the kernel
+the function then returns the context that the kernel will use.  This function
+can be used to see if two contexts are equivalent
+*/
+func CanonicalizeContext(val string) (string, error) {
+	return "", nil
+}
+
+/*
+SetExecLabel sets the SELinux label that the kernel will use for any programs
+that are executed by the current process thread, or an error.
+*/
+func SetExecLabel(label string) error {
+	return nil
+}
+
+// Get returns the Context as a string
+func (c Context) Get() string {
+	return ""
+}
+
+// NewContext creates a new Context struct from the specified label
+func NewContext(label string) Context {
+	c := make(Context)
+	return c
+}
+
+// ReserveLabel reserves the MLS/MCS level component of the specified label
+func ReserveLabel(label string) {
+	return
+}
+
+// EnforceMode returns the current SELinux mode Enforcing, Permissive, Disabled
+func EnforceMode() int {
+	return Disabled
+}
+
+/*
+SetEnforceMode sets the current SELinux mode Enforcing, Permissive.
+Disabled is not valid, since this needs to be set at boot time.
+*/
+func SetEnforceMode(mode int) error {
+	return nil
+}
+
+/*
+DefaultEnforceMode returns the systems default SELinux mode Enforcing,
+Permissive or Disabled. Note this is is just the default at boot time.
+EnforceMode tells you the systems current mode.
+*/
+func DefaultEnforceMode() int {
+	return Disabled
+}
+
+/*
+ReleaseLabel will unreserve the MLS/MCS Level field of the specified label.
+Allowing it to be used by another process.
+*/
+func ReleaseLabel(label string) {
+	return
+}
+
+// ROFileLabel returns the specified SELinux readonly file label
+func ROFileLabel() string {
+	return ""
+}
+
+/*
+ContainerLabels returns an allocated processLabel and fileLabel to be used for
+container labeling by the calling process.
+*/
+func ContainerLabels() (processLabel string, fileLabel string) {
+	return "", ""
+}
+
+// SecurityCheckContext validates that the SELinux label is understood by the kernel
+func SecurityCheckContext(val string) error {
+	return nil
+}
+
+/*
+CopyLevel returns a label with the MLS/MCS level from src label replaced on
+the dest label.
+*/
+func CopyLevel(src, dest string) (string, error) {
+	return "", nil
+}
+
+// Chcon changes the `fpath` file object to the SELinux label `label`.
+// If `fpath` is a directory and `recurse`` is true, Chcon will walk the
+// directory tree setting the label.
+func Chcon(fpath string, label string, recurse bool) error {
+	return nil
+}
+
+// DupSecOpt takes an SELinux process label and returns security options that
+// can be used to set the SELinux Type and Level for future container processes.
+func DupSecOpt(src string) []string {
+	return nil
+}
+
+// DisableSecOpt returns a security opt that can be used to disable SELinux
+// labeling support for future container processes.
+func DisableSecOpt() []string {
+	return []string{"disable"}
+}

vendor/github.com/opencontainers/selinux/go-selinux/xattrs.go

@@ -1,4 +1,4 @@
-// +build linux
+// +build selinux,linux
 
 package selinux