--- a/src/linux/classes/jdk/internal/platform/cgroupv1/SubSystem.java	Wed Sep 11 15:58:27 2019 +0530
+++ b/src/linux/classes/jdk/internal/platform/cgroupv1/SubSystem.java	Mon Dec 14 18:12:00 2020 +0100
@@ -119,7 +119,7 @@
                                                      Function<String, Long> conversion) {
         long retval = Metrics.unlimited_minimum + 1; // default unlimited
         try {
-            List<String> lines = Files.readAllLines(Paths.get(subsystem.path(), param));
+            List<String> lines = subsystem.readMatchingLines(param);
             for (String line: lines) {
                 if (line.contains(match)) {
                     retval = conversion.apply(line);
@@ -132,6 +132,17 @@
         return retval;
     }
 
+    private List<String> readMatchingLines(String param) throws IOException {
+        try {
+            PrivilegedExceptionAction<List<String>> pea = () ->
+                    Files.readAllLines(Paths.get(path(), param));
+            return AccessController.doPrivileged(pea);
+        } catch (PrivilegedActionException e) {
+            Metrics.unwrapIOExceptionAndRethrow(e);
+            throw new InternalError(e.getCause());
+        }
+    }
+
     public static long getLongValue(SubSystem subsystem, String parm) {
         String strval = getStringValue(subsystem, parm);
         return convertStringToLong(strval);