vendor: cadvisor v0.39.0

Main upgrades:
- github.com/opencontainers/runc v1.0.0-rc93
- github.com/containerd/containerd v1.4.4
- github.com/docker/docker v20.10.2
- github.com/mrunalp/fileutils v0.5.0
- github.com/opencontainers/selinux v1.8.0
- github.com/cilium/ebpf v0.2.0

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

@@ -30,6 +30,11 @@ var (
 	// ErrLevelSyntax is returned when a sensitivity or category do not have correct syntax in a level
 	ErrLevelSyntax = errors.New("invalid level syntax")
 
+	// ErrContextMissing is returned if a requested context is not found in a file.
+	ErrContextMissing = errors.New("context does not have a match")
+	// ErrVerifierNil is returned when a context verifier function is nil.
+	ErrVerifierNil = errors.New("verifier function is nil")
+
 	// CategoryRange allows the upper bound on the category range to be adjusted
 	CategoryRange = DefaultCategoryRange
 )
@@ -63,8 +68,12 @@ func FileLabel(fpath string) (string, error) {
 	return fileLabel(fpath)
 }
 
-// SetFSCreateLabel tells kernel the label to create all file system objects
-// created by this task. Setting label="" to return to default.
+// SetFSCreateLabel tells the kernel what label to use for all file system objects
+// created by this task.
+// Set the label to an empty string to return to the default label. Calls to SetFSCreateLabel
+// should be wrapped in runtime.LockOSThread()/runtime.UnlockOSThread() until file system
+// objects created by this task are finished to guarantee another goroutine does not migrate
+// to the current thread before execution is complete.
 func SetFSCreateLabel(label string) error {
 	return setFSCreateLabel(label)
 }
@@ -113,19 +122,27 @@ func CalculateGlbLub(sourceRange, targetRange string) (string, error) {
 }
 
 // SetExecLabel sets the SELinux label that the kernel will use for any programs
-// that are executed by the current process thread, or an error.
+// that are executed by the current process thread, or an error. Calls to SetExecLabel
+// should  be wrapped in runtime.LockOSThread()/runtime.UnlockOSThread() until execution
+// of the program is finished to guarantee another goroutine does not migrate to the current
+// thread before execution is complete.
 func SetExecLabel(label string) error {
 	return setExecLabel(label)
 }
 
 // SetTaskLabel sets the SELinux label for the current thread, or an error.
-// This requires the dyntransition permission.
+// This requires the dyntransition permission. Calls to SetTaskLabel should
+// be wrapped in runtime.LockOSThread()/runtime.UnlockOSThread() to guarantee
+// the current thread does not run in a new mislabeled thread.
 func SetTaskLabel(label string) error {
 	return setTaskLabel(label)
 }
 
 // SetSocketLabel takes a process label and tells the kernel to assign the
-// label to the next socket that gets created
+// label to the next socket that gets created. Calls to SetSocketLabel
+// should be wrapped in runtime.LockOSThread()/runtime.UnlockOSThread() until
+// the the socket is created to guarantee another goroutine does not migrate
+// to the current thread before execution is complete.
 func SetSocketLabel(label string) error {
 	return setSocketLabel(label)
 }
@@ -141,7 +158,10 @@ func PeerLabel(fd uintptr) (string, error) {
 }
 
 // SetKeyLabel takes a process label and tells the kernel to assign the
-// label to the next kernel keyring that gets created
+// label to the next kernel keyring that gets created. Calls to SetKeyLabel
+// should be wrapped in runtime.LockOSThread()/runtime.UnlockOSThread() until
+// the kernel keyring is created to guarantee another goroutine does not migrate
+// to the current thread before execution is complete.
 func SetKeyLabel(label string) error {
 	return setKeyLabel(label)
 }
@@ -247,3 +267,12 @@ func DupSecOpt(src string) ([]string, error) {
 func DisableSecOpt() []string {
 	return disableSecOpt()
 }
+
+// GetDefaultContextWithLevel gets a single context for the specified SELinux user
+// identity that is reachable from the specified scon context. The context is based
+// on the per-user /etc/selinux/{SELINUXTYPE}/contexts/users/<username> if it exists,
+// and falls back to the global /etc/selinux/{SELINUXTYPE}/contexts/default_contexts
+// file.
+func GetDefaultContextWithLevel(user, level, scon string) (string, error) {
+	return getDefaultContextWithLevel(user, level, scon)
+}