Rohan Padhye created BCEL-308:
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Summary: NullPointerException in Verifier Pass 3A
Key: BCEL-308
URL: https://issues.apache.org/jira/browse/BCEL-308
Project: Commons BCEL
Issue Type: Bug
Components: Verifier
Affects Versions: 6.2
Reporter: Rohan Padhye
Attachments: Hello.class
Verifier throws NPE on malformed input instead of reporting verification
failure.
h1. 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]).
h2. Expected output:
VERIFIED_REJECTED
h2. 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)
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