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  1. JDK
  2. JDK-8266345

(fs) Custom DefaultFileSystemProvider security related loops

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    Details

    • Subcomponent:
    • Introduced In Version:
      13
    • Resolved In Build:
      b31
    • Verification:
      Not verified

      Backports

        Description

        ADDITIONAL SYSTEM INFORMATION :
        macOS Catalina 10.15.7
        JDK 16

        A DESCRIPTION OF THE PROBLEM :
        A custom DefaultFileSystemProvider with -Djava.security.manager and -Djava.security.policy=<policy> loops in FileSystemProvider newByteChannel.

        REGRESSION : Last worked in version 12

        STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
        It can be reproduced with the JDK TestProvider class
        /usr/libexec/java_home -v 12 --exec javac -d . ~/Documents/GitHub/jdk16-master/test/jdk/java/nio/file/spi/TestProvider.java

        JDK 12 is the last version where it works for me. (I don't have a working 13. It doesn't work at 14).
        So I compile against that.
        See test class source below.

        It uses the all.poicy file with...
        //

        grant {
            permission java.security.AllPermission;
        };

        Reproduce as shown in Results

        EXPECTED VERSUS ACTUAL BEHAVIOR :
        EXPECTED -
        /usr/libexec/java_home -v 12 --exec java -cp . -Djava.security.manager -Djava.security.policy=all.policy -Djava.nio.file.spi.DefaultFileSystemProvider=TestProvider org.test.Test
        TestProvider$TestFileSystem@23fc625e
        TestProvider

        ACTUAL -
        /usr/libexec/java_home -v 14 --exec java -cp . -Djava.security.manager -Djava.security.policy=Classes/all.policy -Djava.nio.file.spi.DefaultFileSystemProvider=TestProvider org.test.Test
        TestProvider$TestFileSystem@23fc625e
        Exception in thread "main" java.lang.StackOverflowError
        at java.base/java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:593)
        at java.base/java.lang.StringBuilder.append(StringBuilder.java:173)
        at java.base/sun.nio.fs.UnixFileSystem.getPath(UnixFileSystem.java:269)
        at TestProvider$TestFileSystem.getPath(TestProvider.java:261)
        at java.base/java.nio.file.Path.of(Path.java:147)
        at java.base/sun.security.provider.PolicyFile.initDefaultPolicy(PolicyFile.java:478)
        at java.base/sun.security.provider.PolicyFile$2.run(PolicyFile.java:340)
        at java.base/sun.security.provider.PolicyFile$2.run(PolicyFile.java:337)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:312)
        at java.base/sun.security.provider.PolicyFile.initPolicyFile(PolicyFile.java:337)
        at java.base/sun.security.provider.PolicyFile.init(PolicyFile.java:330)
        at java.base/sun.security.provider.PolicyFile.<init>(PolicyFile.java:283)
        at java.base/java.security.Policy.loadPolicyProvider(Policy.java:207)
        at java.base/java.security.Policy.getPolicyNoCheck(Policy.java:178)
        at java.base/java.security.ProtectionDomain.implies(ProtectionDomain.java:321)
        at java.base/java.security.ProtectionDomain.impliesWithAltFilePerm(ProtectionDomain.java:353)
        at java.base/java.security.AccessControlContext.checkPermission(AccessControlContext.java:450)
        at java.base/java.security.AccessController.checkPermission(AccessController.java:1036)
        at java.base/java.lang.SecurityManager.checkPermission(SecurityManager.java:408)
        at java.base/java.lang.SecurityManager.checkRead(SecurityManager.java:747)
        at java.base/sun.nio.fs.UnixChannelFactory.open(UnixChannelFactory.java:255)
        at java.base/sun.nio.fs.UnixChannelFactory.newFileChannel(UnixChannelFactory.java:143)
        at java.base/sun.nio.fs.UnixChannelFactory.newFileChannel(UnixChannelFactory.java:156)
        at java.base/sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:217)
        at TestProvider.newByteChannel(TestProvider.java:173)
        ...

        ---------- BEGIN SOURCE ----------

        package org.test;

        import java.nio.file.FileSystems;
        import java.nio.file.spi.FileSystemProvider;
        import java.lang.reflect.Constructor;

        public class Test {

        public static void main(String [] args) {
        System.out.println(FileSystems.getDefault());
        System.out.println(System.getProperty("java.nio.file.spi.DefaultFileSystemProvider"));
        }

        }

        /usr/libexec/java_home -v 12 --exec javac -d . ~/testfsp/Test.java
        ---------- END SOURCE ----------

        CUSTOMER SUBMITTED WORKAROUND :
        Run JDK12 for custom DefaultFileSystemProvider with -Djava.security.manager and -Djava.security.policy

        FREQUENCY : always


          Attachments

          1. all.policy
            0.1 kB
          2. Test.java
            0.3 kB

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                Assignee:
                mullan Sean Mullan
                Reporter:
                webbuggrp Webbug Group
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                  Dates

                  Created:
                  Updated:
                  Resolved: