IV53349: CRASH IN ZIPFILE.READ()

APAR status

• Closed as program error.

Error description

• Error Message: Multiple threads reading a zip file using the
  ZipFile API can cause a JVM crash.
  .
  Stack Trace: Native stack:
  ZIP_Read () (libzip.so)
  Java_java_util_zip_ZipFile_read () (libzip.so)
  Java stack:
  java/util/zip/ZipFile.read(Native Method)
  
  java/util/zip/ZipFile.access$1200(ZipFile.java:47(Compiled
  Code))
  java/util/zip/ZipFile$ZipFileInputStream.read(ZipFile.java:501()
     java/util/zip/ZipFile$1.fill(ZipFile.java:269(Compiled Code))
  
  java/util/zip/InflaterInputStream.read(InflaterInputStream.java:
  152()java/util/zip/InflaterInputStream.read(InflaterInputStream.
  java:116()
  .
  This error may be intermittent in nature.
  

Local fix

Problem summary

• In a multi-threaded environment, accessing the same Zipfile by
  multiple threads can result in a crash if one thread tries to
  read a stream which is just closed by another thread. The
  streams in Zipfile is not thread safe and it is application
  responsibility to ensure the thread safety. However, it is
  better to avoid a crash.
  

Problem conclusion

• This defect will be fixed in:
  6.0.0 SR16
  6.0.1 SR8
  7.0.0 SR7
  7.1.0 SR1
  .
  The JDK has been updated to introduce a validation to check
  whether the stream is already closed before reading the stream.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  JAVA CLASS LIBS

• Fixed component ID

  620700130

Applicable component levels