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  1. JDK
  2. JDK-8244573

java.lang.ArrayIndexOutOfBoundsException thrown for malformed class file

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    • Subcomponent:
    • Resolved In Build:
      b26
    • Verification:
      Not verified

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        Description

        A DESCRIPTION OF THE PROBLEM :
        javap crashes when reading the attached class file with an ArrayIndexOutOfBoundsException. The malformed class file has a method with an empty name in the constant pool. This file was generated automatically by a fuzzer.

        STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
        1. Download the attached class file as `A.class`
        2. Call javap: `javap -c A.class`

        EXPECTED VERSUS ACTUAL BEHAVIOR :
        EXPECTED -
        Either print an error or print the contents of the class file, including the code in the method.
        ACTUAL -
        Compiled from "A.class"
        public final class example.A extends example.B {
          static volatile a_1.a_1 a_0;

          double ();
            Code:
        Error: A serious internal error has occurred: java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0
        Please file a bug report, and include the following information:
        java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0
                at jdk.jdeps/com.sun.tools.classfile.Instruction.getByte(Instruction.java:173)
                at jdk.jdeps/com.sun.tools.classfile.Instruction.getUnsignedByte(Instruction.java:178)
                at jdk.jdeps/com.sun.tools.classfile.Instruction.getOpcode(Instruction.java:199)
                at jdk.jdeps/com.sun.tools.classfile.Instruction.length(Instruction.java:222)
                at jdk.jdeps/com.sun.tools.classfile.Code_attribute$1.next(Code_attribute.java:117)
                at jdk.jdeps/com.sun.tools.classfile.Code_attribute$1.next(Code_attribute.java:106)
                at jdk.jdeps/com.sun.tools.javap.CodeWriter.writeInstrs(CodeWriter.java:104)
                at jdk.jdeps/com.sun.tools.javap.ClassWriter.writeMethod(ClassWriter.java:591)
                at jdk.jdeps/com.sun.tools.javap.ClassWriter.writeMethods(ClassWriter.java:471)
                at jdk.jdeps/com.sun.tools.javap.ClassWriter.write(ClassWriter.java:269)
                at jdk.jdeps/com.sun.tools.javap.JavapTask.write(JavapTask.java:836)
                at jdk.jdeps/com.sun.tools.javap.JavapTask.writeClass(JavapTask.java:655)
                at jdk.jdeps/com.sun.tools.javap.JavapTask.run(JavapTask.java:600)
                at jdk.jdeps/com.sun.tools.javap.JavapTask.run(JavapTask.java:450)
                at jdk.jdeps/com.sun.tools.javap.Main.main(Main.java:47)


        ---------- BEGIN SOURCE ----------
        This class file was generated by an automatic fuzz testing tool, so there is no source code. The class file is below in Base-64 encoding:

        yv66vgADAC0ADwEAClNvdXJjZUZpbGUBAAdBLmNsYXNzAQAJZXhhbXBsZS9BBwADAQAJZXhhbXBsZS9CBwAFAQADYV8wAQAJTGFfMS9hXzE7AQAAAQADKClEAQAEdGhpcwEAC0xleGFtcGxlL0E7AQASTG9jYWxWYXJpYWJsZVRhYmxlAQAEQ29kZXn/AAQABgAAAAEBSAAHAAgAAAABAAAACQAKAAEADgAAAB4AAAABAAAAAAAAAAEADQAAAAwAAQAAAAAACwAMAAAAAQABAAAAAgAC
        ---------- END SOURCE ----------

        FREQUENCY : always


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                Assignee:
                asotona Adam Sotona
                Reporter:
                webbuggrp Webbug Group
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                  Created:
                  Updated:
                  Resolved: