diff --git a/vendor/golang.org/x/sys/windows/security_windows.go b/vendor/golang.org/x/sys/windows/security_windows.go
index 9e3c44a..111c10d 100644
--- a/vendor/golang.org/x/sys/windows/security_windows.go
+++ b/vendor/golang.org/x/sys/windows/security_windows.go
@@ -624,6 +624,7 @@
 
 // Authorization Functions
 //sys	checkTokenMembership(tokenHandle Token, sidToCheck *SID, isMember *int32) (err error) = advapi32.CheckTokenMembership
+//sys	isTokenRestricted(tokenHandle Token) (ret bool, err error) [!failretval] = advapi32.IsTokenRestricted
 //sys	OpenProcessToken(process Handle, access uint32, token *Token) (err error) = advapi32.OpenProcessToken
 //sys	OpenThreadToken(thread Handle, access uint32, openAsSelf bool, token *Token) (err error) = advapi32.OpenThreadToken
 //sys	ImpersonateSelf(impersonationlevel uint32) (err error) = advapi32.ImpersonateSelf
@@ -837,6 +838,16 @@
 	return b != 0, nil
 }
 
+// IsRestricted reports whether the access token t is a restricted token.
+func (t Token) IsRestricted() (isRestricted bool, err error) {
+	isRestricted, err = isTokenRestricted(t)
+	if !isRestricted && err == syscall.EINVAL {
+		// If err is EINVAL, this returned ERROR_SUCCESS indicating a non-restricted token.
+		err = nil
+	}
+	return
+}
+
 const (
 	WTS_CONSOLE_CONNECT        = 0x1
 	WTS_CONSOLE_DISCONNECT     = 0x2
@@ -897,6 +908,19 @@
 	dacl     *ACL
 }
 
+type SECURITY_QUALITY_OF_SERVICE struct {
+	Length              uint32
+	ImpersonationLevel  uint32
+	ContextTrackingMode byte
+	EffectiveOnly       byte
+}
+
+// Constants for the ContextTrackingMode field of SECURITY_QUALITY_OF_SERVICE.
+const (
+	SECURITY_STATIC_TRACKING  = 0
+	SECURITY_DYNAMIC_TRACKING = 1
+)
+
 type SecurityAttributes struct {
 	Length             uint32
 	SecurityDescriptor *SECURITY_DESCRIPTOR
@@ -1103,9 +1127,10 @@
 }
 
 //sys	getSecurityInfo(handle Handle, objectType SE_OBJECT_TYPE, securityInformation SECURITY_INFORMATION, owner **SID, group **SID, dacl **ACL, sacl **ACL, sd **SECURITY_DESCRIPTOR) (ret error) = advapi32.GetSecurityInfo
-//sys	SetSecurityInfo(handle Handle, objectType SE_OBJECT_TYPE, securityInformation SECURITY_INFORMATION, owner *SID, group *SID, dacl *ACL, sacl *ACL) = advapi32.SetSecurityInfo
+//sys	SetSecurityInfo(handle Handle, objectType SE_OBJECT_TYPE, securityInformation SECURITY_INFORMATION, owner *SID, group *SID, dacl *ACL, sacl *ACL) (ret error) = advapi32.SetSecurityInfo
 //sys	getNamedSecurityInfo(objectName string, objectType SE_OBJECT_TYPE, securityInformation SECURITY_INFORMATION, owner **SID, group **SID, dacl **ACL, sacl **ACL, sd **SECURITY_DESCRIPTOR) (ret error) = advapi32.GetNamedSecurityInfoW
 //sys	SetNamedSecurityInfo(objectName string, objectType SE_OBJECT_TYPE, securityInformation SECURITY_INFORMATION, owner *SID, group *SID, dacl *ACL, sacl *ACL) (ret error) = advapi32.SetNamedSecurityInfoW
+//sys	SetKernelObjectSecurity(handle Handle, securityInformation SECURITY_INFORMATION, securityDescriptor *SECURITY_DESCRIPTOR) (err error) = advapi32.SetKernelObjectSecurity
 
 //sys	buildSecurityDescriptor(owner *TRUSTEE, group *TRUSTEE, countAccessEntries uint32, accessEntries *EXPLICIT_ACCESS, countAuditEntries uint32, auditEntries *EXPLICIT_ACCESS, oldSecurityDescriptor *SECURITY_DESCRIPTOR, sizeNewSecurityDescriptor *uint32, newSecurityDescriptor **SECURITY_DESCRIPTOR) (ret error) = advapi32.BuildSecurityDescriptorW
 //sys	initializeSecurityDescriptor(absoluteSD *SECURITY_DESCRIPTOR, revision uint32) (err error) = advapi32.InitializeSecurityDescriptor
@@ -1309,7 +1334,11 @@
 }
 
 func (selfRelativeSD *SECURITY_DESCRIPTOR) copySelfRelativeSecurityDescriptor() *SECURITY_DESCRIPTOR {
-	sdLen := (int)(selfRelativeSD.Length())
+	sdLen := int(selfRelativeSD.Length())
+	const min = int(unsafe.Sizeof(SECURITY_DESCRIPTOR{}))
+	if sdLen < min {
+		sdLen = min
+	}
 
 	var src []byte
 	h := (*unsafeheader.Slice)(unsafe.Pointer(&src))
@@ -1317,7 +1346,15 @@
 	h.Len = sdLen
 	h.Cap = sdLen
 
-	dst := make([]byte, sdLen)
+	const psize = int(unsafe.Sizeof(uintptr(0)))
+
+	var dst []byte
+	h = (*unsafeheader.Slice)(unsafe.Pointer(&dst))
+	alloc := make([]uintptr, (sdLen+psize-1)/psize)
+	h.Data = (*unsafeheader.Slice)(unsafe.Pointer(&alloc)).Data
+	h.Len = sdLen
+	h.Cap = sdLen
+
 	copy(dst, src)
 	return (*SECURITY_DESCRIPTOR)(unsafe.Pointer(&dst[0]))
 }