build(deps): bump github.com/opencontainers/selinux from 1.4.0 to 1.5.0

Bumps [github.com/opencontainers/selinux](https://github.com/opencontainers/selinux) from 1.4.0 to 1.5.0.
- [Release notes](https://github.com/opencontainers/selinux/releases)
- [Commits](https://github.com/opencontainers/selinux/compare/v1.4.0...v1.5.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

4 files changed, 69 insertions, 25 deletions

diff --git a/go.mod b/go.mod
index 96108b370..1d543d606 100644
--- a/go.mod
+++ b/go.mod
@@ -42,7 +42,7 @@ require (
 	github.com/opencontainers/runc v1.0.0-rc9
 	github.com/opencontainers/runtime-spec v0.1.2-0.20190618234442-a950415649c7
 	github.com/opencontainers/runtime-tools v0.9.0
-	github.com/opencontainers/selinux v1.4.0
+	github.com/opencontainers/selinux v1.5.0
 	github.com/opentracing/opentracing-go v1.1.0
 	github.com/pkg/errors v0.9.1
 	github.com/pmezard/go-difflib v1.0.0
diff --git a/go.sum b/go.sum
index db0663584..b429aef93 100644
--- a/go.sum
+++ b/go.sum
@@ -351,6 +351,8 @@ github.com/opencontainers/selinux v1.3.1/go.mod h1:yTcKuYAh6R95iDpefGLQaPaRwJFwy
 github.com/opencontainers/selinux v1.3.2/go.mod h1:yTcKuYAh6R95iDpefGLQaPaRwJFwyzAJufJyiTt7s0g=
 github.com/opencontainers/selinux v1.4.0 h1:cpiX/2wWIju/6My60T6/z9CxNG7c8xTQyEmA9fChpUo=
 github.com/opencontainers/selinux v1.4.0/go.mod h1:yTcKuYAh6R95iDpefGLQaPaRwJFwyzAJufJyiTt7s0g=
+github.com/opencontainers/selinux v1.5.0 h1:giFN+hbiSqvKWPyagmNk9sABaH7VUZ/+XS7tInqDQ6c=
+github.com/opencontainers/selinux v1.5.0/go.mod h1:yTcKuYAh6R95iDpefGLQaPaRwJFwyzAJufJyiTt7s0g=
 github.com/openshift/api v0.0.0-20200106203948-7ab22a2c8316 h1:enQG2QUGwug4fR1yM6hL0Fjzx6Km/exZY6RbSPwMu3o=
 github.com/openshift/api v0.0.0-20200106203948-7ab22a2c8316/go.mod h1:dv+J0b/HWai0QnMVb37/H0v36klkLBi2TNpPeWDxX10=
 github.com/openshift/imagebuilder v1.1.3 h1:8TiphsD2wboU7tygtGZ5ZBfCP9FH2ZtvEAli67V2PJ4=
diff --git a/vendor/github.com/opencontainers/selinux/go-selinux/selinux_linux.go b/vendor/github.com/opencontainers/selinux/go-selinux/selinux_linux.go
index 599bdb6e2..9c979e5e2 100644
--- a/vendor/github.com/opencontainers/selinux/go-selinux/selinux_linux.go
+++ b/vendor/github.com/opencontainers/selinux/go-selinux/selinux_linux.go
@@ -31,6 +31,7 @@ const (
 	// Disabled constant to indicate SELinux is disabled
 	Disabled = -1
 
+	contextFile      = "/usr/share/containers/selinux/contexts"
 	selinuxDir       = "/etc/selinux/"
 	selinuxConfig    = selinuxDir + "config"
 	selinuxfsMount   = "/sys/fs/selinux"
@@ -684,23 +685,26 @@ func ROFileLabel() string {
 	return roFileLabel
 }
 
-/*
-ContainerLabels returns an allocated processLabel and fileLabel to be used for
-container labeling by the calling process.
-*/
-func ContainerLabels() (processLabel string, fileLabel string) {
+func openContextFile() (*os.File, error) {
+	if f, err := os.Open(contextFile); err == nil {
+		return f, nil
+	}
+	lxcPath := filepath.Join(getSELinuxPolicyRoot(), "/contexts/lxc_contexts")
+	return os.Open(lxcPath)
+}
+
+var labels = loadLabels()
+
+func loadLabels() map[string]string {
 	var (
 		val, key string
 		bufin    *bufio.Reader
 	)
 
-	if !GetEnabled() {
-		return "", ""
-	}
-	lxcPath := fmt.Sprintf("%s/contexts/lxc_contexts", getSELinuxPolicyRoot())
-	in, err := os.Open(lxcPath)
+	labels := make(map[string]string)
+	in, err := openContextFile()
 	if err != nil {
-		return "", ""
+		return labels
 	}
 	defer in.Close()
 
@@ -712,7 +716,7 @@ func ContainerLabels() (processLabel string, fileLabel string) {
 			if err == io.EOF {
 				done = true
 			} else {
-				goto exit
+				break
 			}
 		}
 		line = strings.TrimSpace(line)
@@ -726,26 +730,64 @@ func ContainerLabels() (processLabel string, fileLabel string) {
 		}
 		if groups := assignRegex.FindStringSubmatch(line); groups != nil {
 			key, val = strings.TrimSpace(groups[1]), strings.TrimSpace(groups[2])
-			if key == "process" {
-				processLabel = strings.Trim(val, "\"")
-			}
-			if key == "file" {
-				fileLabel = strings.Trim(val, "\"")
-			}
-			if key == "ro_file" {
-				roFileLabel = strings.Trim(val, "\"")
-			}
+			labels[key] = strings.Trim(val, "\"")
 		}
 	}
 
-	if processLabel == "" || fileLabel == "" {
+	return labels
+}
+
+/*
+KVMContainerLabels returns the default processLabel and mountLabel to be used
+for kvm containers by the calling process.
+*/
+func KVMContainerLabels() (string, string) {
+	processLabel := labels["kvm_process"]
+	if processLabel == "" {
+		processLabel = labels["process"]
+	}
+
+	return addMcs(processLabel, labels["file"])
+}
+
+/*
+InitContainerLabels returns the default processLabel and file labels to be
+used for containers running an init system like systemd by the calling process.
+*/
+func InitContainerLabels() (string, string) {
+	processLabel := labels["init_process"]
+	if processLabel == "" {
+		processLabel = labels["process"]
+	}
+
+	return addMcs(processLabel, labels["file"])
+}
+
+/*
+ContainerLabels returns an allocated processLabel and fileLabel to be used for
+container labeling by the calling process.
+*/
+func ContainerLabels() (processLabel string, fileLabel string) {
+	if !GetEnabled() {
 		return "", ""
 	}
 
+	processLabel = labels["process"]
+	fileLabel = labels["file"]
+	roFileLabel = labels["ro_file"]
+
+	if processLabel == "" || fileLabel == "" {
+		return "", fileLabel
+	}
+
 	if roFileLabel == "" {
 		roFileLabel = fileLabel
 	}
-exit:
+
+	return addMcs(processLabel, fileLabel)
+}
+
+func addMcs(processLabel, fileLabel string) (string, string) {
 	scon, _ := NewContext(processLabel)
 	if scon["level"] != "" {
 		mcs := uniqMcs(1024)
diff --git a/vendor/modules.txt b/vendor/modules.txt
index f474a12cf..1ab14101d 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -411,7 +411,7 @@ github.com/opencontainers/runtime-tools/generate
 github.com/opencontainers/runtime-tools/generate/seccomp
 github.com/opencontainers/runtime-tools/specerror
 github.com/opencontainers/runtime-tools/validate
-# github.com/opencontainers/selinux v1.4.0
+# github.com/opencontainers/selinux v1.5.0
 github.com/opencontainers/selinux/go-selinux
 github.com/opencontainers/selinux/go-selinux/label
 github.com/opencontainers/selinux/pkg/pwalk