vendor: opencontainers/selinux v1.5.2

full diff: https://github.com/opencontainers/selinux/compare/v1.5.1...v1.5.2

- Implement FormatMountLabel unconditionally
  Implementing FormatMountLabel on situations built without selinux
  should be possible; the context will be ignored if no SELinux is available.
- Remote potential race condition, where mcs label is freed
  Theorectially if you do not change the MCS Label then we free it and two
  commands later reserve it. If some other process was grabbing MCS Labels
  at the same time, the other process could get the same label.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor.conf

@@ -168,7 +168,7 @@ github.com/morikuni/aec                             39771216ff4c63d11f5e604076f9
 # metrics
 github.com/docker/go-metrics                        b619b3592b65de4f087d9f16863a7e6ff905973c # v0.0.1
 
-github.com/opencontainers/selinux                   0d49ba2a6aae052c614dfe5de62a158711a6c461 # v1.5.1
+github.com/opencontainers/selinux                   c688bba66d7ecb448819836b96f9c416da8b0746 # v1.5.2
 
 
 # archive/tar

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

@@ -1,6 +1,8 @@
 package label
 
 import (
+	"fmt"
+
 	"github.com/opencontainers/selinux/go-selinux"
 )
 
@@ -46,7 +48,7 @@ var PidLabel = selinux.PidLabel
 
 // Init initialises the labeling system
 func Init() {
-	selinux.GetEnabled()
+	_ = selinux.GetEnabled()
 }
 
 // ClearLabels will clear all reserved labels
@@ -75,3 +77,21 @@ func ReleaseLabel(label string) error {
 // can be used to set duplicate labels on future container processes
 // Deprecated: use selinux.DupSecOpt
 var DupSecOpt = selinux.DupSecOpt
+
+// FormatMountLabel returns a string to be used by the mount command.
+// The format of this string will be used to alter the labeling of the mountpoint.
+// The string returned is suitable to be used as the options field of the mount command.
+// If you need to have additional mount point options, you can pass them in as
+// the first parameter.  Second parameter is the label that you wish to apply
+// to all content in the mount point.
+func FormatMountLabel(src, mountLabel string) string {
+	if mountLabel != "" {
+		switch src {
+		case "":
+			src = fmt.Sprintf("context=%q", mountLabel)
+		default:
+			src = fmt.Sprintf("%s,context=%q", src, mountLabel)
+		}
+	}
+	return src
+}

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

@@ -3,7 +3,6 @@
 package label
 
 import (
-	"fmt"
 	"os"
 	"os/user"
 	"strings"
@@ -43,7 +42,7 @@ func InitLabels(options []string) (plabel string, mlabel string, Err error) {
 		if err != nil {
 			return "", "", err
 		}
-
+		mcsLevel := pcon["level"]
 		mcon, err := selinux.NewContext(mountLabel)
 		if err != nil {
 			return "", "", err
@@ -62,16 +61,21 @@ func InitLabels(options []string) (plabel string, mlabel string, Err error) {
 			}
 			if con[0] == "filetype" {
 				mcon["type"] = con[1]
+				continue
 			}
 			pcon[con[0]] = con[1]
 			if con[0] == "level" || con[0] == "user" {
 				mcon[con[0]] = con[1]
 			}
 		}
-		selinux.ReleaseLabel(processLabel)
-		processLabel = pcon.Get()
-		mountLabel = mcon.Get()
-		selinux.ReserveLabel(processLabel)
+		if pcon.Get() != processLabel {
+			if pcon["level"] != mcsLevel {
+				selinux.ReleaseLabel(processLabel)
+			}
+			processLabel = pcon.Get()
+			mountLabel = mcon.Get()
+			selinux.ReserveLabel(processLabel)
+		}
 	}
 	return processLabel, mountLabel, nil
 }
@@ -82,24 +86,6 @@ func GenLabels(options string) (string, string, error) {
 	return InitLabels(strings.Fields(options))
 }
 
-// FormatMountLabel returns a string to be used by the mount command.
-// The format of this string will be used to alter the labeling of the mountpoint.
-// The string returned is suitable to be used as the options field of the mount command.
-// If you need to have additional mount point options, you can pass them in as
-// the first parameter.  Second parameter is the label that you wish to apply
-// to all content in the mount point.
-func FormatMountLabel(src, mountLabel string) string {
-	if mountLabel != "" {
-		switch src {
-		case "":
-			src = fmt.Sprintf("context=%q", mountLabel)
-		default:
-			src = fmt.Sprintf("%s,context=%q", src, mountLabel)
-		}
-	}
-	return src
-}
-
 // SetFileLabel modifies the "path" label to the specified file label
 func SetFileLabel(path string, fileLabel string) error {
 	if !selinux.GetEnabled() || fileLabel == "" {

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

@@ -15,10 +15,6 @@ func GenLabels(options string) (string, string, error) {
 	return "", "", nil
 }
 
-func FormatMountLabel(src string, mountLabel string) string {
-	return src
-}
-
 func SetFileLabel(path string, fileLabel string) error {
 	return nil
 }