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  1. Commons BCEL
  2. BCEL-308

NullPointerException in Verifier Pass 3A

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    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 6.2
    • Fix Version/s: None
    • Component/s: Verifier
    • Labels:
      None

      Description

      Verifier throws NPE on malformed input instead of reporting verification failure.

      Steps to reproduce:

       

      Save the attached file as "Hello.class" and run:

      java -cp <classpath> org.apache.bcel.verifier.Verifier Hello

       

      The file Hello.class was generated automatically by the fuzzer JQF (https://github.com/rohanpadhye/jqf).

      Expected output:

      VERIFIED_REJECTED

      Observed output:

      JustIce by Enver Haase, (C) 2001-2002.

      <http://bcel.sourceforge.net>

      <http://commons.apache.org/bcel>

       

      Now verifying: Hello

       

      Pass 1:

      VERIFIED_OK

      Passed verification.

       

      Pass 2:

      VERIFIED_OK

      Passed verification.

       

      Exception in thread "main" java.lang.NullPointerException

      at org.apache.bcel.generic.FieldOrMethod.getReferenceType(FieldOrMethod.java:116)

      at org.apache.bcel.generic.FieldOrMethod.getLoadClassType(FieldOrMethod.java:133)

      at org.apache.bcel.verifier.statics.Pass3aVerifier$InstOperandConstraintVisitor.visitLoadClass(Pass3aVerifier.java:521)

      at org.apache.bcel.generic.INVOKESPECIAL.accept(INVOKESPECIAL.java:86)

      at org.apache.bcel.generic.InstructionHandle.accept(InstructionHandle.java:302)

      at org.apache.bcel.verifier.statics.Pass3aVerifier.pass3StaticInstructionOperandsChecks(Pass3aVerifier.java:443)

      at org.apache.bcel.verifier.statics.Pass3aVerifier.do_verify(Pass3aVerifier.java:208)

      at org.apache.bcel.verifier.PassVerifier.verify(PassVerifier.java:71)

      at org.apache.bcel.verifier.Verifier.doPass3a(Verifier.java:89)

      at org.apache.bcel.verifier.Verifier.main(Verifier.java:216)

        Attachments

        1. Hello.class
          1.0 kB
          Rohan Padhye

          Activity

            People

            • Assignee:
              Unassigned
              Reporter:
              rohanpadhye Rohan Padhye
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              Dates

              • Created:
                Updated: