Update cri to v1.11.0.

Signed-off-by: Lantao Liu <lantaol@google.com>

vendor/github.com/opencontainers/runtime-tools/validate/validate.go

@@ -13,40 +13,47 @@ import (
 	"regexp"
 	"runtime"
 	"strings"
-	"syscall"
 	"unicode"
 	"unicode/utf8"
 
 	"github.com/blang/semver"
 	"github.com/hashicorp/go-multierror"
 	rspec "github.com/opencontainers/runtime-spec/specs-go"
+	osFilepath "github.com/opencontainers/runtime-tools/filepath"
 	"github.com/sirupsen/logrus"
 	"github.com/syndtr/gocapability/capability"
 
 	"github.com/opencontainers/runtime-tools/specerror"
+	"github.com/xeipuuv/gojsonschema"
 )
 
 const specConfig = "config.json"
 
 var (
-	defaultRlimits = []string{
+	// http://pubs.opengroup.org/onlinepubs/9699919799/functions/getrlimit.html
+	posixRlimits = []string{
 		"RLIMIT_AS",
 		"RLIMIT_CORE",
 		"RLIMIT_CPU",
 		"RLIMIT_DATA",
 		"RLIMIT_FSIZE",
-		"RLIMIT_LOCKS",
+		"RLIMIT_NOFILE",
+		"RLIMIT_STACK",
+	}
+
+	// https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/man2/getrlimit.2?h=man-pages-4.13
+	linuxRlimits = append(posixRlimits, []string{
 		"RLIMIT_MEMLOCK",
 		"RLIMIT_MSGQUEUE",
 		"RLIMIT_NICE",
-		"RLIMIT_NOFILE",
 		"RLIMIT_NPROC",
 		"RLIMIT_RSS",
 		"RLIMIT_RTPRIO",
 		"RLIMIT_RTTIME",
 		"RLIMIT_SIGPENDING",
-		"RLIMIT_STACK",
-	}
+	}...)
+
+	configSchemaTemplate = "https://raw.githubusercontent.com/opencontainers/runtime-spec/v%s/schema/config-schema.json"
 )
 
 // Validator represents a validator for runtime bundle
@@ -58,23 +65,20 @@ type Validator struct {
 }
 
 // NewValidator creates a Validator
-func NewValidator(spec *rspec.Spec, bundlePath string, hostSpecific bool, platform string) Validator {
+func NewValidator(spec *rspec.Spec, bundlePath string, hostSpecific bool, platform string) (Validator, error) {
 	if hostSpecific && platform != runtime.GOOS {
-		platform = runtime.GOOS
+		return Validator{}, fmt.Errorf("When hostSpecific is set, platform must be same as the host platform")
 	}
 	return Validator{
 		spec:         spec,
 		bundlePath:   bundlePath,
 		HostSpecific: hostSpecific,
 		platform:     platform,
-	}
+	}, nil
 }
 
 // NewValidatorFromPath creates a Validator with specified bundle path
 func NewValidatorFromPath(bundlePath string, hostSpecific bool, platform string) (Validator, error) {
-	if hostSpecific && platform != runtime.GOOS {
-		platform = runtime.GOOS
-	}
 	if bundlePath == "" {
 		return Validator{}, fmt.Errorf("bundle path shouldn't be empty")
 	}
@@ -86,7 +90,7 @@ func NewValidatorFromPath(bundlePath string, hostSpecific bool, platform string)
 	configPath := filepath.Join(bundlePath, specConfig)
 	content, err := ioutil.ReadFile(configPath)
 	if err != nil {
-		return Validator{}, specerror.NewError(specerror.ConfigFileExistence, err, rspec.Version)
+		return Validator{}, specerror.NewError(specerror.ConfigInRootBundleDir, err, rspec.Version)
 	}
 	if !utf8.Valid(content) {
 		return Validator{}, fmt.Errorf("%q is not encoded in UTF-8", configPath)
@@ -96,38 +100,109 @@ func NewValidatorFromPath(bundlePath string, hostSpecific bool, platform string)
 		return Validator{}, err
 	}
 
-	return NewValidator(&spec, bundlePath, hostSpecific, platform), nil
+	return NewValidator(&spec, bundlePath, hostSpecific, platform)
 }
 
 // CheckAll checks all parts of runtime bundle
 func (v *Validator) CheckAll() error {
 	var errs *multierror.Error
+	errs = multierror.Append(errs, v.CheckJSONSchema())
 	errs = multierror.Append(errs, v.CheckPlatform())
 	errs = multierror.Append(errs, v.CheckRoot())
 	errs = multierror.Append(errs, v.CheckMandatoryFields())
 	errs = multierror.Append(errs, v.CheckSemVer())
 	errs = multierror.Append(errs, v.CheckMounts())
 	errs = multierror.Append(errs, v.CheckProcess())
-	errs = multierror.Append(errs, v.CheckHooks())
 	errs = multierror.Append(errs, v.CheckLinux())
+	errs = multierror.Append(errs, v.CheckAnnotations())
+	if v.platform == "linux" || v.platform == "solaris" {
+		errs = multierror.Append(errs, v.CheckHooks())
+	}
 
 	return errs.ErrorOrNil()
 }
 
+// JSONSchemaURL returns the URL for the JSON Schema specifying the
+// configuration format.  It consumes configSchemaTemplate, but we
+// provide it as a function to isolate consumers from inconsistent
+// naming as runtime-spec evolves.
+func JSONSchemaURL(version string) (url string, err error) {
+	ver, err := semver.Parse(version)
+	if err != nil {
+		return "", specerror.NewError(specerror.SpecVersionInSemVer, err, rspec.Version)
+	}
+	configRenamedToConfigSchemaVersion, err := semver.Parse("1.0.0-rc2") // config.json became config-schema.json in 1.0.0-rc2
+	if ver.Compare(configRenamedToConfigSchemaVersion) == -1 {
+		return "", fmt.Errorf("unsupported configuration version (older than %s)", configRenamedToConfigSchemaVersion)
+	}
+	return fmt.Sprintf(configSchemaTemplate, version), nil
+}
+
+// CheckJSONSchema validates the configuration against the
+// runtime-spec JSON Schema, using the version of the schema that
+// matches the configuration's declared version.
+func (v *Validator) CheckJSONSchema() (errs error) {
+	logrus.Debugf("check JSON schema")
+
+	url, err := JSONSchemaURL(v.spec.Version)
+	if err != nil {
+		errs = multierror.Append(errs, err)
+		return errs
+	}
+
+	schemaLoader := gojsonschema.NewReferenceLoader(url)
+	documentLoader := gojsonschema.NewGoLoader(v.spec)
+	result, err := gojsonschema.Validate(schemaLoader, documentLoader)
+	if err != nil {
+		errs = multierror.Append(errs, err)
+		return errs
+	}
+
+	if !result.Valid() {
+		for _, resultError := range result.Errors() {
+			errs = multierror.Append(errs, errors.New(resultError.String()))
+		}
+	}
+
+	return errs
+}
+
 // CheckRoot checks status of v.spec.Root
 func (v *Validator) CheckRoot() (errs error) {
 	logrus.Debugf("check root")
 
-	if v.platform == "windows" && v.spec.Windows != nil && v.spec.Windows.HyperV != nil {
-		if v.spec.Root != nil {
+	if v.platform == "windows" && v.spec.Windows != nil {
+		if v.spec.Windows.HyperV != nil {
+			if v.spec.Root != nil {
+				errs = multierror.Append(errs,
+					specerror.NewError(specerror.RootOnHyperVNotSet, fmt.Errorf("for Hyper-V containers, Root must not be set"), rspec.Version))
+			}
+			return
+		} else if v.spec.Root == nil {
 			errs = multierror.Append(errs,
-				specerror.NewError(specerror.RootOnHyperV, fmt.Errorf("for Hyper-V containers, Root must not be set"), rspec.Version))
+				specerror.NewError(specerror.RootOnWindowsRequired, fmt.Errorf("on Windows, for Windows Server Containers, this field is REQUIRED"), rspec.Version))
 			return
 		}
-		return
-	} else if v.spec.Root == nil {
+	} else if v.platform != "windows" && v.spec.Root == nil {
 		errs = multierror.Append(errs,
-			specerror.NewError(specerror.RootOnNonHyperV, fmt.Errorf("for non-Hyper-V containers, Root must be set"), rspec.Version))
+			specerror.NewError(specerror.RootOnNonWindowsRequired, fmt.Errorf("on all other platforms, this field is REQUIRED"), rspec.Version))
+		return
+	}
+
+	if v.platform == "windows" {
+		matched, err := regexp.MatchString(`\\\\[?]\\Volume[{][a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}[}]\\`, v.spec.Root.Path)
+		if err != nil {
+			errs = multierror.Append(errs, err)
+		} else if !matched {
+			errs = multierror.Append(errs,
+				specerror.NewError(specerror.RootPathOnWindowsGUID, fmt.Errorf("root.path is %q, but it MUST be a volume GUID path when target platform is windows", v.spec.Root.Path), rspec.Version))
+		}
+
+		if v.spec.Root.Readonly {
+			errs = multierror.Append(errs,
+				specerror.NewError(specerror.RootReadonlyOnWindowsFalse, fmt.Errorf("root.readonly field MUST be omitted or false when target platform is windows"), rspec.Version))
+		}
+
 		return
 	}
 
@@ -139,7 +214,7 @@ func (v *Validator) CheckRoot() (errs error) {
 
 	if filepath.Base(v.spec.Root.Path) != "rootfs" {
 		errs = multierror.Append(errs,
-			specerror.NewError(specerror.PathName, fmt.Errorf("path name should be the conventional 'rootfs'"), rspec.Version))
+			specerror.NewError(specerror.RootPathOnPosixConvention, fmt.Errorf("path name should be the conventional 'rootfs'"), rspec.Version))
 	}
 
 	var rootfsPath string
@@ -159,10 +234,10 @@ func (v *Validator) CheckRoot() (errs error) {
 
 	if fi, err := os.Stat(rootfsPath); err != nil {
 		errs = multierror.Append(errs,
-			specerror.NewError(specerror.PathExistence, fmt.Errorf("cannot find the root path %q", rootfsPath), rspec.Version))
+			specerror.NewError(specerror.RootPathExist, fmt.Errorf("cannot find the root path %q", rootfsPath), rspec.Version))
 	} else if !fi.IsDir() {
 		errs = multierror.Append(errs,
-			specerror.NewError(specerror.PathExistence, fmt.Errorf("root.path %q is not a directory", rootfsPath), rspec.Version))
+			specerror.NewError(specerror.RootPathExist, fmt.Errorf("root.path %q is not a directory", rootfsPath), rspec.Version))
 	}
 
 	rootParent := filepath.Dir(absRootPath)
@@ -171,13 +246,6 @@ func (v *Validator) CheckRoot() (errs error) {
 			specerror.NewError(specerror.ArtifactsInSingleDir, fmt.Errorf("root.path is %q, but it MUST be a child of %q", v.spec.Root.Path, absBundlePath), rspec.Version))
 	}
 
-	if v.platform == "windows" {
-		if v.spec.Root.Readonly {
-			errs = multierror.Append(errs,
-				specerror.NewError(specerror.ReadonlyOnWindows, fmt.Errorf("root.readonly field MUST be omitted or false when target platform is windows"), rspec.Version))
-		}
-	}
-
 	return
 }
 
@@ -189,7 +257,7 @@ func (v *Validator) CheckSemVer() (errs error) {
 	_, err := semver.Parse(version)
 	if err != nil {
 		errs = multierror.Append(errs,
-			specerror.NewError(specerror.SpecVersion, fmt.Errorf("%q is not valid SemVer: %s", version, err.Error()), rspec.Version))
+			specerror.NewError(specerror.SpecVersionInSemVer, fmt.Errorf("%q is not valid SemVer: %s", version, err.Error()), rspec.Version))
 	}
 	if version != rspec.Version {
 		errs = multierror.Append(errs, fmt.Errorf("validate currently only handles version %s, but the supplied configuration targets %s", rspec.Version, version))
@@ -202,19 +270,29 @@ func (v *Validator) CheckSemVer() (errs error) {
 func (v *Validator) CheckHooks() (errs error) {
 	logrus.Debugf("check hooks")
 
+	if v.platform != "linux" && v.platform != "solaris" {
+		errs = multierror.Append(errs, fmt.Errorf("For %q platform, the configuration structure does not support hooks", v.platform))
+		return
+	}
+
 	if v.spec.Hooks != nil {
-		errs = multierror.Append(errs, checkEventHooks("pre-start", v.spec.Hooks.Prestart, v.HostSpecific))
-		errs = multierror.Append(errs, checkEventHooks("post-start", v.spec.Hooks.Poststart, v.HostSpecific))
-		errs = multierror.Append(errs, checkEventHooks("post-stop", v.spec.Hooks.Poststop, v.HostSpecific))
+		errs = multierror.Append(errs, v.checkEventHooks("prestart", v.spec.Hooks.Prestart, v.HostSpecific))
+		errs = multierror.Append(errs, v.checkEventHooks("poststart", v.spec.Hooks.Poststart, v.HostSpecific))
+		errs = multierror.Append(errs, v.checkEventHooks("poststop", v.spec.Hooks.Poststop, v.HostSpecific))
 	}
 
 	return
 }
 
-func checkEventHooks(hookType string, hooks []rspec.Hook, hostSpecific bool) (errs error) {
-	for _, hook := range hooks {
-		if !filepath.IsAbs(hook.Path) {
-			errs = multierror.Append(errs, fmt.Errorf("the %s hook %v: is not absolute path", hookType, hook.Path))
+func (v *Validator) checkEventHooks(hookType string, hooks []rspec.Hook, hostSpecific bool) (errs error) {
+	for i, hook := range hooks {
+		if !osFilepath.IsAbs(v.platform, hook.Path) {
+			errs = multierror.Append(errs,
+				specerror.NewError(
+					specerror.PosixHooksPathAbs,
+					fmt.Errorf("hooks.%s[%d].path %v: is not absolute path",
+						hookType, i, hook.Path),
+					rspec.Version))
 		}
 
 		if hostSpecific {
@@ -246,8 +324,12 @@ func (v *Validator) CheckProcess() (errs error) {
 	}
 
 	process := v.spec.Process
-	if !filepath.IsAbs(process.Cwd) {
-		errs = multierror.Append(errs, fmt.Errorf("cwd %q is not an absolute path", process.Cwd))
+	if !osFilepath.IsAbs(v.platform, process.Cwd) {
+		errs = multierror.Append(errs,
+			specerror.NewError(
+				specerror.ProcCwdAbs,
+				fmt.Errorf("cwd %q is not an absolute path", process.Cwd),
+				rspec.Version))
 	}
 
 	for _, env := range process.Env {
@@ -257,9 +339,13 @@ func (v *Validator) CheckProcess() (errs error) {
 	}
 
 	if len(process.Args) == 0 {
-		errs = multierror.Append(errs, fmt.Errorf("args must not be empty"))
+		errs = multierror.Append(errs,
+			specerror.NewError(
+				specerror.ProcArgsOneEntryRequired,
+				fmt.Errorf("args must not be empty"),
+				rspec.Version))
 	} else {
-		if filepath.IsAbs(process.Args[0]) {
+		if filepath.IsAbs(process.Args[0]) && v.spec.Root != nil {
 			var rootfsPath string
 			if filepath.IsAbs(v.spec.Root.Path) {
 				rootfsPath = v.spec.Root.Path
@@ -281,12 +367,15 @@ func (v *Validator) CheckProcess() (errs error) {
 		}
 	}
 
-	if v.spec.Process.Capabilities != nil {
-		errs = multierror.Append(errs, v.CheckCapabilities())
+	if v.platform == "linux" || v.platform == "solaris" {
+		errs = multierror.Append(errs, v.CheckRlimits())
 	}
-	errs = multierror.Append(errs, v.CheckRlimits())
 
 	if v.platform == "linux" {
+		if v.spec.Process.Capabilities != nil {
+			errs = multierror.Append(errs, v.CheckCapabilities())
+		}
+
 		if len(process.ApparmorProfile) > 0 {
 			profilePath := filepath.Join(v.bundlePath, v.spec.Root.Path, "/etc/apparmor.d", process.ApparmorProfile)
 			_, err := os.Stat(profilePath)
@@ -301,60 +390,61 @@ func (v *Validator) CheckProcess() (errs error) {
 
 // CheckCapabilities checks v.spec.Process.Capabilities
 func (v *Validator) CheckCapabilities() (errs error) {
+	if v.platform != "linux" {
+		errs = multierror.Append(errs, fmt.Errorf("For %q platform, the configuration structure does not support process.capabilities", v.platform))
+		return
+	}
+
 	process := v.spec.Process
-	if v.platform == "linux" {
-		var effective, permitted, inheritable, ambient bool
-		caps := make(map[string][]string)
+	var effective, permitted, inheritable, ambient bool
+	caps := make(map[string][]string)
 
-		for _, cap := range process.Capabilities.Bounding {
-			caps[cap] = append(caps[cap], "bounding")
-		}
-		for _, cap := range process.Capabilities.Effective {
-			caps[cap] = append(caps[cap], "effective")
-		}
-		for _, cap := range process.Capabilities.Inheritable {
-			caps[cap] = append(caps[cap], "inheritable")
-		}
-		for _, cap := range process.Capabilities.Permitted {
-			caps[cap] = append(caps[cap], "permitted")
-		}
-		for _, cap := range process.Capabilities.Ambient {
-			caps[cap] = append(caps[cap], "ambient")
+	for _, cap := range process.Capabilities.Bounding {
+		caps[cap] = append(caps[cap], "bounding")
+	}
+	for _, cap := range process.Capabilities.Effective {
+		caps[cap] = append(caps[cap], "effective")
+	}
+	for _, cap := range process.Capabilities.Inheritable {
+		caps[cap] = append(caps[cap], "inheritable")
+	}
+	for _, cap := range process.Capabilities.Permitted {
+		caps[cap] = append(caps[cap], "permitted")
+	}
+	for _, cap := range process.Capabilities.Ambient {
+		caps[cap] = append(caps[cap], "ambient")
+	}
+
+	for capability, owns := range caps {
+		if err := CapValid(capability, v.HostSpecific); err != nil {
+			errs = multierror.Append(errs, fmt.Errorf("capability %q is not valid, man capabilities(7)", capability))
 		}
 
-		for capability, owns := range caps {
-			if err := CapValid(capability, v.HostSpecific); err != nil {
-				errs = multierror.Append(errs, fmt.Errorf("capability %q is not valid, man capabilities(7)", capability))
+		effective, permitted, ambient, inheritable = false, false, false, false
+		for _, set := range owns {
+			if set == "effective" {
+				effective = true
+				continue
 			}
-
-			effective, permitted, ambient, inheritable = false, false, false, false
-			for _, set := range owns {
-				if set == "effective" {
-					effective = true
-					continue
-				}
-				if set == "inheritable" {
-					inheritable = true
-					continue
-				}
-				if set == "permitted" {
-					permitted = true
-					continue
-				}
-				if set == "ambient" {
-					ambient = true
-					continue
-				}
+			if set == "inheritable" {
+				inheritable = true
+				continue
 			}
-			if effective && !permitted {
-				errs = multierror.Append(errs, fmt.Errorf("effective capability %q is not allowed, as it's not permitted", capability))
+			if set == "permitted" {
+				permitted = true
+				continue
 			}
-			if ambient && !(effective && inheritable) {
-				errs = multierror.Append(errs, fmt.Errorf("ambient capability %q is not allowed, as it's not permitted and inheribate", capability))
+			if set == "ambient" {
+				ambient = true
+				continue
 			}
 		}
-	} else {
-		logrus.Warnf("process.capabilities validation not yet implemented for OS %q", v.platform)
+		if effective && !permitted {
+			errs = multierror.Append(errs, fmt.Errorf("effective capability %q is not allowed, as it's not permitted", capability))
+		}
+		if ambient && !(permitted && inheritable) {
+			errs = multierror.Append(errs, fmt.Errorf("ambient capability %q is not allowed, as it's not permitted and inheribate", capability))
+		}
 	}
 
 	return
@@ -362,11 +452,21 @@ func (v *Validator) CheckCapabilities() (errs error) {
 
 // CheckRlimits checks v.spec.Process.Rlimits
 func (v *Validator) CheckRlimits() (errs error) {
+	if v.platform != "linux" && v.platform != "solaris" {
+		errs = multierror.Append(errs, fmt.Errorf("For %q platform, the configuration structure does not support process.rlimits", v.platform))
+		return
+	}
+
 	process := v.spec.Process
 	for index, rlimit := range process.Rlimits {
 		for i := index + 1; i < len(process.Rlimits); i++ {
 			if process.Rlimits[index].Type == process.Rlimits[i].Type {
-				errs = multierror.Append(errs, fmt.Errorf("rlimit can not contain the same type %q", process.Rlimits[index].Type))
+				errs = multierror.Append(errs,
+					specerror.NewError(
+						specerror.PosixProcRlimitsErrorOnDup,
+						fmt.Errorf("rlimit can not contain the same type %q",
+							process.Rlimits[index].Type),
+						rspec.Version))
 			}
 		}
 		errs = multierror.Append(errs, v.rlimitValid(rlimit))
@@ -430,31 +530,33 @@ func (v *Validator) CheckMounts() (errs error) {
 		if supportedTypes != nil && !supportedTypes[mountA.Type] {
 			errs = multierror.Append(errs, fmt.Errorf("unsupported mount type %q", mountA.Type))
 		}
-		if v.platform == "windows" {
-			if err := pathValid(v.platform, mountA.Destination); err != nil {
-				errs = multierror.Append(errs, err)
-			}
-			if err := pathValid(v.platform, mountA.Source); err != nil {
-				errs = multierror.Append(errs, err)
-			}
-		} else {
-			if err := pathValid(v.platform, mountA.Destination); err != nil {
-				errs = multierror.Append(errs, err)
-			}
+		if !osFilepath.IsAbs(v.platform, mountA.Destination) {
+			errs = multierror.Append(errs,
+				specerror.NewError(
+					specerror.MountsDestAbs,
+					fmt.Errorf("mounts[%d].destination %q is not absolute",
+						i,
+						mountA.Destination),
+					rspec.Version))
 		}
 		for j, mountB := range v.spec.Mounts {
 			if i == j {
 				continue
 			}
 			// whether B.Desination is nested within A.Destination
-			nested, err := nestedValid(v.platform, mountA.Destination, mountB.Destination)
+			nested, err := osFilepath.IsAncestor(v.platform, mountA.Destination, mountB.Destination, ".")
 			if err != nil {
 				errs = multierror.Append(errs, err)
 				continue
 			}
 			if nested {
 				if v.platform == "windows" && i < j {
-					errs = multierror.Append(errs, fmt.Errorf("on Windows, %v nested within %v is forbidden", mountB.Destination, mountA.Destination))
+					errs = multierror.Append(errs,
+						specerror.NewError(
+							specerror.MountsDestOnWindowsNotNested,
+							fmt.Errorf("on Windows, %v nested within %v is forbidden",
+								mountB.Destination, mountA.Destination),
+							rspec.Version))
 				}
 				if i > j {
 					logrus.Warnf("%v will be covered by %v", mountB.Destination, mountA.Destination)
@@ -475,200 +577,18 @@ func (v *Validator) CheckPlatform() (errs error) {
 		return
 	}
 
+	if v.HostSpecific && v.platform != runtime.GOOS {
+		errs = multierror.Append(errs, fmt.Errorf("platform %q differs from the host %q, skipping host-specific checks", v.platform, runtime.GOOS))
+		v.HostSpecific = false
+	}
+
 	if v.platform == "windows" {
 		if v.spec.Windows == nil {
-			errs = multierror.Append(errs, errors.New("'windows' MUST be set when platform is `windows`"))
-		}
-	}
-
-	return
-}
-
-// CheckLinux checks v.spec.Linux
-func (v *Validator) CheckLinux() (errs error) {
-	logrus.Debugf("check linux")
-
-	if v.spec.Linux == nil {
-		return
-	}
-
-	var nsTypeList = map[rspec.LinuxNamespaceType]struct {
-		num      int
-		newExist bool
-	}{
-		rspec.PIDNamespace:     {0, false},
-		rspec.NetworkNamespace: {0, false},
-		rspec.MountNamespace:   {0, false},
-		rspec.IPCNamespace:     {0, false},
-		rspec.UTSNamespace:     {0, false},
-		rspec.UserNamespace:    {0, false},
-		rspec.CgroupNamespace:  {0, false},
-	}
-
-	for index := 0; index < len(v.spec.Linux.Namespaces); index++ {
-		ns := v.spec.Linux.Namespaces[index]
-		if !namespaceValid(ns) {
-			errs = multierror.Append(errs, fmt.Errorf("namespace %v is invalid", ns))
-		}
-
-		tmpItem := nsTypeList[ns.Type]
-		tmpItem.num = tmpItem.num + 1
-		if tmpItem.num > 1 {
-			errs = multierror.Append(errs, fmt.Errorf("duplicated namespace %q", ns.Type))
-		}
-
-		if len(ns.Path) == 0 {
-			tmpItem.newExist = true
-		}
-		nsTypeList[ns.Type] = tmpItem
-	}
-
-	if (len(v.spec.Linux.UIDMappings) > 0 || len(v.spec.Linux.GIDMappings) > 0) && !nsTypeList[rspec.UserNamespace].newExist {
-		errs = multierror.Append(errs, errors.New("the UID/GID mappings requires a new User namespace to be specified as well"))
-	} else if len(v.spec.Linux.UIDMappings) > 5 {
-		errs = multierror.Append(errs, errors.New("only 5 UID mappings are allowed (linux kernel restriction)"))
-	} else if len(v.spec.Linux.GIDMappings) > 5 {
-		errs = multierror.Append(errs, errors.New("only 5 GID mappings are allowed (linux kernel restriction)"))
-	}
-
-	for k := range v.spec.Linux.Sysctl {
-		if strings.HasPrefix(k, "net.") && !nsTypeList[rspec.NetworkNamespace].newExist {
-			errs = multierror.Append(errs, fmt.Errorf("sysctl %v requires a new Network namespace to be specified as well", k))
-		}
-		if strings.HasPrefix(k, "fs.mqueue.") {
-			if !nsTypeList[rspec.MountNamespace].newExist || !nsTypeList[rspec.IPCNamespace].newExist {
-				errs = multierror.Append(errs, fmt.Errorf("sysctl %v requires a new IPC namespace and Mount namespace to be specified as well", k))
-			}
-		}
-	}
-
-	if v.platform == "linux" && !nsTypeList[rspec.UTSNamespace].newExist && v.spec.Hostname != "" {
-		errs = multierror.Append(errs, fmt.Errorf("on Linux, hostname requires a new UTS namespace to be specified as well"))
-	}
-
-	// Linux devices validation
-	devList := make(map[string]bool)
-	devTypeList := make(map[string]bool)
-	for index := 0; index < len(v.spec.Linux.Devices); index++ {
-		device := v.spec.Linux.Devices[index]
-		if !deviceValid(device) {
-			errs = multierror.Append(errs, fmt.Errorf("device %v is invalid", device))
-		}
-
-		if _, exists := devList[device.Path]; exists {
-			errs = multierror.Append(errs, fmt.Errorf("device %s is duplicated", device.Path))
-		} else {
-			var rootfsPath string
-			if filepath.IsAbs(v.spec.Root.Path) {
-				rootfsPath = v.spec.Root.Path
-			} else {
-				rootfsPath = filepath.Join(v.bundlePath, v.spec.Root.Path)
-			}
-			absPath := filepath.Join(rootfsPath, device.Path)
-			fi, err := os.Stat(absPath)
-			if os.IsNotExist(err) {
-				devList[device.Path] = true
-			} else if err != nil {
-				errs = multierror.Append(errs, err)
-			} else {
-				fStat, ok := fi.Sys().(*syscall.Stat_t)
-				if !ok {
-					errs = multierror.Append(errs, fmt.Errorf("cannot determine state for device %s", device.Path))
-					continue
-				}
-				var devType string
-				switch fStat.Mode & syscall.S_IFMT {
-				case syscall.S_IFCHR:
-					devType = "c"
-				case syscall.S_IFBLK:
-					devType = "b"
-				case syscall.S_IFIFO:
-					devType = "p"
-				default:
-					devType = "unmatched"
-				}
-				if devType != device.Type || (devType == "c" && device.Type == "u") {
-					errs = multierror.Append(errs, fmt.Errorf("unmatched %s already exists in filesystem", device.Path))
-					continue
-				}
-				if devType != "p" {
-					dev := fStat.Rdev
-					major := (dev >> 8) & 0xfff
-					minor := (dev & 0xff) | ((dev >> 12) & 0xfff00)
-					if int64(major) != device.Major || int64(minor) != device.Minor {
-						errs = multierror.Append(errs, fmt.Errorf("unmatched %s already exists in filesystem", device.Path))
-						continue
-					}
-				}
-				if device.FileMode != nil {
-					expectedPerm := *device.FileMode & os.ModePerm
-					actualPerm := fi.Mode() & os.ModePerm
-					if expectedPerm != actualPerm {
-						errs = multierror.Append(errs, fmt.Errorf("unmatched %s already exists in filesystem", device.Path))
-						continue
-					}
-				}
-				if device.UID != nil {
-					if *device.UID != fStat.Uid {
-						errs = multierror.Append(errs, fmt.Errorf("unmatched %s already exists in filesystem", device.Path))
-						continue
-					}
-				}
-				if device.GID != nil {
-					if *device.GID != fStat.Gid {
-						errs = multierror.Append(errs, fmt.Errorf("unmatched %s already exists in filesystem", device.Path))
-						continue
-					}
-				}
-			}
-		}
-
-		// unify u->c when comparing, they are synonyms
-		var devID string
-		if device.Type == "u" {
-			devID = fmt.Sprintf("%s:%d:%d", "c", device.Major, device.Minor)
-		} else {
-			devID = fmt.Sprintf("%s:%d:%d", device.Type, device.Major, device.Minor)
-		}
-
-		if _, exists := devTypeList[devID]; exists {
-			logrus.Warnf("type:%s, major:%d and minor:%d for linux devices is duplicated", device.Type, device.Major, device.Minor)
-		} else {
-			devTypeList[devID] = true
-		}
-	}
-
-	if v.spec.Linux.Resources != nil {
-		errs = multierror.Append(errs, v.CheckLinuxResources())
-	}
-
-	if v.spec.Linux.Seccomp != nil {
-		errs = multierror.Append(errs, v.CheckSeccomp())
-	}
-
-	switch v.spec.Linux.RootfsPropagation {
-	case "":
-	case "private":
-	case "rprivate":
-	case "slave":
-	case "rslave":
-	case "shared":
-	case "rshared":
-	case "unbindable":
-	case "runbindable":
-	default:
-		errs = multierror.Append(errs, errors.New("rootfsPropagation must be empty or one of \"private|rprivate|slave|rslave|shared|rshared|unbindable|runbindable\""))
-	}
-
-	for _, maskedPath := range v.spec.Linux.MaskedPaths {
-		if !strings.HasPrefix(maskedPath, "/") {
-			errs = multierror.Append(errs, fmt.Errorf("maskedPath %v is not an absolute path", maskedPath))
-		}
-	}
-
-	for _, readonlyPath := range v.spec.Linux.ReadonlyPaths {
-		if !strings.HasPrefix(readonlyPath, "/") {
-			errs = multierror.Append(errs, fmt.Errorf("readonlyPath %v is not an absolute path", readonlyPath))
+			errs = multierror.Append(errs,
+				specerror.NewError(
+					specerror.PlatformSpecConfOnWindowsSet,
+					fmt.Errorf("'windows' MUST be set when platform is `windows`"),
+					rspec.Version))
 		}
 	}
 
@@ -710,7 +630,7 @@ func (v *Validator) CheckLinuxResources() (errs error) {
 	}
 	for index := 0; index < len(r.Devices); index++ {
 		switch r.Devices[index].Type {
-		case "a", "b", "c":
+		case "a", "b", "c", "":
 		default:
 			errs = multierror.Append(errs, fmt.Errorf("type of devices %s is invalid", r.Devices[index].Type))
 		}
@@ -726,44 +646,41 @@ func (v *Validator) CheckLinuxResources() (errs error) {
 		}
 	}
 
+	if r.BlockIO != nil && r.BlockIO.WeightDevice != nil {
+		for i, weightDevice := range r.BlockIO.WeightDevice {
+			if weightDevice.Weight == nil && weightDevice.LeafWeight == nil {
+				errs = multierror.Append(errs,
+					specerror.NewError(
+						specerror.BlkIOWeightOrLeafWeightExist,
+						fmt.Errorf("linux.resources.blockIO.weightDevice[%d] specifies neither weight nor leafWeight", i),
+						rspec.Version))
+			}
+		}
+	}
+
 	return
 }
 
-// CheckSeccomp checkc v.spec.Linux.Seccomp
-func (v *Validator) CheckSeccomp() (errs error) {
-	logrus.Debugf("check linux seccomp")
+// CheckAnnotations checks v.spec.Annotations
+func (v *Validator) CheckAnnotations() (errs error) {
+	logrus.Debugf("check annotations")
 
-	s := v.spec.Linux.Seccomp
-	if !seccompActionValid(s.DefaultAction) {
-		errs = multierror.Append(errs, fmt.Errorf("seccomp defaultAction %q is invalid", s.DefaultAction))
-	}
-	for index := 0; index < len(s.Syscalls); index++ {
-		if !syscallValid(s.Syscalls[index]) {
-			errs = multierror.Append(errs, fmt.Errorf("syscall %v is invalid", s.Syscalls[index]))
+	reversedDomain := regexp.MustCompile(`^[A-Za-z]{2,6}(\.[A-Za-z0-9-]{1,63})+$`)
+	for key := range v.spec.Annotations {
+		if strings.HasPrefix(key, "org.opencontainers") {
+			errs = multierror.Append(errs,
+				specerror.NewError(
+					specerror.AnnotationsKeyReservedNS,
+					fmt.Errorf("key %q is reserved", key),
+					rspec.Version))
 		}
-	}
-	for index := 0; index < len(s.Architectures); index++ {
-		switch s.Architectures[index] {
-		case rspec.ArchX86:
-		case rspec.ArchX86_64:
-		case rspec.ArchX32:
-		case rspec.ArchARM:
-		case rspec.ArchAARCH64:
-		case rspec.ArchMIPS:
-		case rspec.ArchMIPS64:
-		case rspec.ArchMIPS64N32:
-		case rspec.ArchMIPSEL:
-		case rspec.ArchMIPSEL64:
-		case rspec.ArchMIPSEL64N32:
-		case rspec.ArchPPC:
-		case rspec.ArchPPC64:
-		case rspec.ArchPPC64LE:
-		case rspec.ArchS390:
-		case rspec.ArchS390X:
-		case rspec.ArchPARISC:
-		case rspec.ArchPARISC64:
-		default:
-			errs = multierror.Append(errs, fmt.Errorf("seccomp architecture %q is invalid", s.Architectures[index]))
+
+		if !reversedDomain.MatchString(key) {
+			errs = multierror.Append(errs,
+				specerror.NewError(
+					specerror.AnnotationsKeyReversedDomain,
+					fmt.Errorf("key %q SHOULD be named using a reverse domain notation", key),
+					rspec.Version))
 		}
 	}
 
@@ -793,17 +710,6 @@ func CapValid(c string, hostSpecific bool) error {
 	return nil
 }
 
-// LastCap return last cap of system
-func LastCap() capability.Cap {
-	last := capability.CAP_LAST_CAP
-	// hack for RHEL6 which has no /proc/sys/kernel/cap_last_cap
-	if last == capability.Cap(63) {
-		last = capability.CAP_BLOCK_SUSPEND
-	}
-
-	return last
-}
-
 func envValid(env string) bool {
 	items := strings.Split(env, "=")
 	if len(items) < 2 {
@@ -826,12 +732,19 @@ func (v *Validator) rlimitValid(rlimit rspec.POSIXRlimit) (errs error) {
 	}
 
 	if v.platform == "linux" {
-		for _, val := range defaultRlimits {
+		for _, val := range linuxRlimits {
 			if val == rlimit.Type {
 				return
 			}
 		}
-		errs = multierror.Append(errs, fmt.Errorf("rlimit type %q is invalid", rlimit.Type))
+		errs = multierror.Append(errs, specerror.NewError(specerror.PosixProcRlimitsTypeValueError, fmt.Errorf("rlimit type %q may not be valid", rlimit.Type), v.spec.Version))
+	} else if v.platform == "solaris" {
+		for _, val := range posixRlimits {
+			if val == rlimit.Type {
+				return
+			}
+		}
+		errs = multierror.Append(errs, specerror.NewError(specerror.PosixProcRlimitsTypeValueError, fmt.Errorf("rlimit type %q may not be valid", rlimit.Type), v.spec.Version))
 	} else {
 		logrus.Warnf("process.rlimits validation not yet implemented for platform %q", v.platform)
 	}
@@ -839,135 +752,6 @@ func (v *Validator) rlimitValid(rlimit rspec.POSIXRlimit) (errs error) {
 	return
 }
 
-func namespaceValid(ns rspec.LinuxNamespace) bool {
-	switch ns.Type {
-	case rspec.PIDNamespace:
-	case rspec.NetworkNamespace:
-	case rspec.MountNamespace:
-	case rspec.IPCNamespace:
-	case rspec.UTSNamespace:
-	case rspec.UserNamespace:
-	case rspec.CgroupNamespace:
-	default:
-		return false
-	}
-
-	if ns.Path != "" && !filepath.IsAbs(ns.Path) {
-		return false
-	}
-
-	return true
-}
-
-func pathValid(os, path string) error {
-	if os == "windows" {
-		matched, err := regexp.MatchString("^[a-zA-Z]:(\\\\[^\\\\/<>|:*?\"]+)+$", path)
-		if err != nil {
-			return err
-		}
-		if !matched {
-			return fmt.Errorf("invalid windows path %v", path)
-		}
-		return nil
-	}
-	if !filepath.IsAbs(path) {
-		return fmt.Errorf("%v is not an absolute path", path)
-	}
-	return nil
-}
-
-// Check whether pathB is nested whithin pathA
-func nestedValid(os, pathA, pathB string) (bool, error) {
-	if pathA == pathB {
-		return false, nil
-	}
-	if pathA == "/" && pathB != "" {
-		return true, nil
-	}
-
-	var sep string
-	if os == "windows" {
-		sep = "\\"
-	} else {
-		sep = "/"
-	}
-
-	splitedPathA := strings.Split(filepath.Clean(pathA), sep)
-	splitedPathB := strings.Split(filepath.Clean(pathB), sep)
-	lenA := len(splitedPathA)
-	lenB := len(splitedPathB)
-
-	if lenA > lenB {
-		if (lenA - lenB) == 1 {
-			// if pathA is longer but not end with separator
-			if splitedPathA[lenA-1] != "" {
-				return false, nil
-			}
-			splitedPathA = splitedPathA[:lenA-1]
-		} else {
-			return false, nil
-		}
-	}
-
-	for i, partA := range splitedPathA {
-		if partA != splitedPathB[i] {
-			return false, nil
-		}
-	}
-
-	return true, nil
-}
-
-func deviceValid(d rspec.LinuxDevice) bool {
-	switch d.Type {
-	case "b", "c", "u":
-		if d.Major <= 0 || d.Minor <= 0 {
-			return false
-		}
-	case "p":
-		if d.Major > 0 || d.Minor > 0 {
-			return false
-		}
-	default:
-		return false
-	}
-	return true
-}
-
-func seccompActionValid(secc rspec.LinuxSeccompAction) bool {
-	switch secc {
-	case rspec.ActKill:
-	case rspec.ActTrap:
-	case rspec.ActErrno:
-	case rspec.ActTrace:
-	case rspec.ActAllow:
-	default:
-		return false
-	}
-	return true
-}
-
-func syscallValid(s rspec.LinuxSyscall) bool {
-	if !seccompActionValid(s.Action) {
-		return false
-	}
-	for index := 0; index < len(s.Args); index++ {
-		arg := s.Args[index]
-		switch arg.Op {
-		case rspec.OpNotEqual:
-		case rspec.OpLessThan:
-		case rspec.OpLessEqual:
-		case rspec.OpEqualTo:
-		case rspec.OpGreaterEqual:
-		case rspec.OpGreaterThan:
-		case rspec.OpMaskedEqual:
-		default:
-			return false
-		}
-	}
-	return true
-}
-
 func isStruct(t reflect.Type) bool {
 	return t.Kind() == reflect.Struct
 }
@@ -1046,5 +830,9 @@ func checkMandatory(obj interface{}) (errs error) {
 func (v *Validator) CheckMandatoryFields() error {
 	logrus.Debugf("check mandatory fields")
 
+	if v.spec == nil {
+		return fmt.Errorf("Spec can't be nil")
+	}
+
 	return checkMandatory(v.spec)
 }

vendor/github.com/opencontainers/runtime-tools/validate/validate_linux.go

@@ -0,0 +1,230 @@
+// +build linux
+
+package validate
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"syscall"
+
+	"github.com/syndtr/gocapability/capability"
+
+	multierror "github.com/hashicorp/go-multierror"
+	rspec "github.com/opencontainers/runtime-spec/specs-go"
+	osFilepath "github.com/opencontainers/runtime-tools/filepath"
+	"github.com/opencontainers/runtime-tools/specerror"
+	"github.com/sirupsen/logrus"
+)
+
+// LastCap return last cap of system
+func LastCap() capability.Cap {
+	last := capability.CAP_LAST_CAP
+	// hack for RHEL6 which has no /proc/sys/kernel/cap_last_cap
+	if last == capability.Cap(63) {
+		last = capability.CAP_BLOCK_SUSPEND
+	}
+
+	return last
+}
+
+func deviceValid(d rspec.LinuxDevice) bool {
+	switch d.Type {
+	case "b", "c", "u":
+		if d.Major <= 0 || d.Minor <= 0 {
+			return false
+		}
+	case "p":
+		if d.Major != 0 || d.Minor != 0 {
+			return false
+		}
+	default:
+		return false
+	}
+	return true
+}
+
+// CheckLinux checks v.spec.Linux
+func (v *Validator) CheckLinux() (errs error) {
+	logrus.Debugf("check linux")
+
+	if v.spec.Linux == nil {
+		return
+	}
+
+	var nsTypeList = map[rspec.LinuxNamespaceType]struct {
+		num      int
+		newExist bool
+	}{
+		rspec.PIDNamespace:     {0, false},
+		rspec.NetworkNamespace: {0, false},
+		rspec.MountNamespace:   {0, false},
+		rspec.IPCNamespace:     {0, false},
+		rspec.UTSNamespace:     {0, false},
+		rspec.UserNamespace:    {0, false},
+		rspec.CgroupNamespace:  {0, false},
+	}
+
+	for index := 0; index < len(v.spec.Linux.Namespaces); index++ {
+		ns := v.spec.Linux.Namespaces[index]
+		if ns.Path != "" && !osFilepath.IsAbs(v.platform, ns.Path) {
+			errs = multierror.Append(errs, specerror.NewError(specerror.NSPathAbs, fmt.Errorf("namespace.path %q is not an absolute path", ns.Path), rspec.Version))
+		}
+
+		tmpItem := nsTypeList[ns.Type]
+		tmpItem.num = tmpItem.num + 1
+		if tmpItem.num > 1 {
+			errs = multierror.Append(errs, specerror.NewError(specerror.NSErrorOnDup, fmt.Errorf("duplicated namespace %q", ns.Type), rspec.Version))
+		}
+
+		if len(ns.Path) == 0 {
+			tmpItem.newExist = true
+		}
+		nsTypeList[ns.Type] = tmpItem
+	}
+
+	if (len(v.spec.Linux.UIDMappings) > 0 || len(v.spec.Linux.GIDMappings) > 0) && !nsTypeList[rspec.UserNamespace].newExist {
+		errs = multierror.Append(errs, errors.New("the UID/GID mappings requires a new User namespace to be specified as well"))
+	}
+
+	for k := range v.spec.Linux.Sysctl {
+		if strings.HasPrefix(k, "net.") && !nsTypeList[rspec.NetworkNamespace].newExist {
+			errs = multierror.Append(errs, fmt.Errorf("sysctl %v requires a new Network namespace to be specified as well", k))
+		}
+		if strings.HasPrefix(k, "fs.mqueue.") {
+			if !nsTypeList[rspec.MountNamespace].newExist || !nsTypeList[rspec.IPCNamespace].newExist {
+				errs = multierror.Append(errs, fmt.Errorf("sysctl %v requires a new IPC namespace and Mount namespace to be specified as well", k))
+			}
+		}
+	}
+
+	if v.platform == "linux" && !nsTypeList[rspec.UTSNamespace].newExist && v.spec.Hostname != "" {
+		errs = multierror.Append(errs, fmt.Errorf("on Linux, hostname requires a new UTS namespace to be specified as well"))
+	}
+
+	// Linux devices validation
+	devList := make(map[string]bool)
+	devTypeList := make(map[string]bool)
+	for index := 0; index < len(v.spec.Linux.Devices); index++ {
+		device := v.spec.Linux.Devices[index]
+		if !deviceValid(device) {
+			errs = multierror.Append(errs, fmt.Errorf("device %v is invalid", device))
+		}
+
+		if _, exists := devList[device.Path]; exists {
+			errs = multierror.Append(errs, fmt.Errorf("device %s is duplicated", device.Path))
+		} else {
+			var rootfsPath string
+			if filepath.IsAbs(v.spec.Root.Path) {
+				rootfsPath = v.spec.Root.Path
+			} else {
+				rootfsPath = filepath.Join(v.bundlePath, v.spec.Root.Path)
+			}
+			absPath := filepath.Join(rootfsPath, device.Path)
+			fi, err := os.Stat(absPath)
+			if os.IsNotExist(err) {
+				devList[device.Path] = true
+			} else if err != nil {
+				errs = multierror.Append(errs, err)
+			} else {
+				fStat, ok := fi.Sys().(*syscall.Stat_t)
+				if !ok {
+					errs = multierror.Append(errs, specerror.NewError(specerror.DevicesAvailable,
+						fmt.Errorf("cannot determine state for device %s", device.Path), rspec.Version))
+					continue
+				}
+				var devType string
+				switch fStat.Mode & syscall.S_IFMT {
+				case syscall.S_IFCHR:
+					devType = "c"
+				case syscall.S_IFBLK:
+					devType = "b"
+				case syscall.S_IFIFO:
+					devType = "p"
+				default:
+					devType = "unmatched"
+				}
+				if devType != device.Type || (devType == "c" && device.Type == "u") {
+					errs = multierror.Append(errs, specerror.NewError(specerror.DevicesFileNotMatch,
+						fmt.Errorf("unmatched %s already exists in filesystem", device.Path), rspec.Version))
+					continue
+				}
+				if devType != "p" {
+					dev := fStat.Rdev
+					major := (dev >> 8) & 0xfff
+					minor := (dev & 0xff) | ((dev >> 12) & 0xfff00)
+					if int64(major) != device.Major || int64(minor) != device.Minor {
+						errs = multierror.Append(errs, specerror.NewError(specerror.DevicesFileNotMatch,
+							fmt.Errorf("unmatched %s already exists in filesystem", device.Path), rspec.Version))
+						continue
+					}
+				}
+				if device.FileMode != nil {
+					expectedPerm := *device.FileMode & os.ModePerm
+					actualPerm := fi.Mode() & os.ModePerm
+					if expectedPerm != actualPerm {
+						errs = multierror.Append(errs, specerror.NewError(specerror.DevicesFileNotMatch,
+							fmt.Errorf("unmatched %s already exists in filesystem", device.Path), rspec.Version))
+						continue
+					}
+				}
+				if device.UID != nil {
+					if *device.UID != fStat.Uid {
+						errs = multierror.Append(errs, specerror.NewError(specerror.DevicesFileNotMatch,
+							fmt.Errorf("unmatched %s already exists in filesystem", device.Path), rspec.Version))
+						continue
+					}
+				}
+				if device.GID != nil {
+					if *device.GID != fStat.Gid {
+						errs = multierror.Append(errs, specerror.NewError(specerror.DevicesFileNotMatch,
+							fmt.Errorf("unmatched %s already exists in filesystem", device.Path), rspec.Version))
+						continue
+					}
+				}
+			}
+		}
+
+		// unify u->c when comparing, they are synonyms
+		var devID string
+		if device.Type == "u" {
+			devID = fmt.Sprintf("%s:%d:%d", "c", device.Major, device.Minor)
+		} else {
+			devID = fmt.Sprintf("%s:%d:%d", device.Type, device.Major, device.Minor)
+		}
+
+		if _, exists := devTypeList[devID]; exists {
+			logrus.Warnf("%v", specerror.NewError(specerror.DevicesErrorOnDup, fmt.Errorf("type:%s, major:%d and minor:%d for linux devices is duplicated", device.Type, device.Major, device.Minor), rspec.Version))
+		} else {
+			devTypeList[devID] = true
+		}
+	}
+
+	if v.spec.Linux.Resources != nil {
+		errs = multierror.Append(errs, v.CheckLinuxResources())
+	}
+
+	for _, maskedPath := range v.spec.Linux.MaskedPaths {
+		if !strings.HasPrefix(maskedPath, "/") {
+			errs = multierror.Append(errs,
+				specerror.NewError(
+					specerror.MaskedPathsAbs,
+					fmt.Errorf("maskedPath %v is not an absolute path", maskedPath),
+					rspec.Version))
+		}
+	}
+
+	for _, readonlyPath := range v.spec.Linux.ReadonlyPaths {
+		if !strings.HasPrefix(readonlyPath, "/") {
+			errs = multierror.Append(errs,
+				specerror.NewError(
+					specerror.ReadonlyPathsAbs,
+					fmt.Errorf("readonlyPath %v is not an absolute path", readonlyPath),
+					rspec.Version))
+		}
+	}
+
+	return
+}

vendor/github.com/opencontainers/runtime-tools/validate/validate_unsupported.go

@@ -0,0 +1,17 @@
+// +build !linux
+
+package validate
+
+import (
+	"github.com/syndtr/gocapability/capability"
+)
+
+// LastCap return last cap of system
+func LastCap() capability.Cap {
+	return capability.Cap(-1)
+}
+
+// CheckLinux is a noop on this platform
+func (v *Validator) CheckLinux() (errs error) {
+	return nil
+}