[jira] [Commented] (BCEL-311) ClassCastException in Verifier Pass 2

["Gary Gregory (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BCEL-311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16879695#comment-16879695 ] 

Gary Gregory commented on BCEL-311:
-----------------------------------

The {{Hello}} class file you provided is not in a Java package, therefore I cannot add it along with all of your other classes with the exact same unpackaged class name :( to our {{src/test/resources}} folder.

It would be great if you could provide class files in a package named after _something_ like jqf_0, jqf_1, and son on. This would allow us to add these files as {{src/test/resources/jqf_0/Hello.class}}, {{src/test/resources/jqf_1/Hello.class}}, and so on.

> ClassCastException in Verifier Pass 2
> -------------------------------------
>
>                 Key: BCEL-311
>                 URL: https://issues.apache.org/jira/browse/BCEL-311
>             Project: Commons BCEL
>          Issue Type: Bug
>          Components: Verifier
>    Affects Versions: 6.2
>            Reporter: Rohan Padhye
>            Priority: Major
>         Attachments: Hello.class
>
>
> Verifier throws ClassCastException 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.
>  
> Exception in thread "main" java.lang.ClassCastException: Illegal constant 'CONSTANT_Class[7](name_index = 21)' at index '5'. '<<Method>>' expects a 'class org.apache.bcel.classfile.ConstantUtf8'.
>  at org.apache.bcel.verifier.statics.Pass2Verifier$CPESSC_Visitor.checkIndex(Pass2Verifier.java:372)
>  at org.apache.bcel.verifier.statics.Pass2Verifier$CPESSC_Visitor.visitMethod(Pass2Verifier.java:622)
>  at org.apache.bcel.classfile.Method.accept(Method.java:108)
>  at org.apache.bcel.classfile.DescendingVisitor.visitMethod(DescendingVisitor.java:159)
>  at org.apache.bcel.classfile.Method.accept(Method.java:108)
>  at org.apache.bcel.classfile.DescendingVisitor.visitJavaClass(DescendingVisitor.java:99)
>  at org.apache.bcel.classfile.JavaClass.accept(JavaClass.java:213)
>  at org.apache.bcel.classfile.DescendingVisitor.visit(DescendingVisitor.java:85)
>  at org.apache.bcel.verifier.statics.Pass2Verifier$CPESSC_Visitor.<init>(Pass2Verifier.java:361)
>  at org.apache.bcel.verifier.statics.Pass2Verifier$CPESSC_Visitor.<init>(Pass2Verifier.java:317)
>  at org.apache.bcel.verifier.statics.Pass2Verifier.constant_pool_entries_satisfy_static_constraints(Pass2Verifier.java:302)
>  at org.apache.bcel.verifier.statics.Pass2Verifier.do_verify(Pass2Verifier.java:161)
>  at org.apache.bcel.verifier.PassVerifier.verify(PassVerifier.java:71)
>  at org.apache.bcel.verifier.Verifier.doPass2(Verifier.java:76)
>  at org.apache.bcel.verifier.Verifier.main(Verifier.java:211)



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