IV18975: MEMORY OVERWRITE WHEN USING IBM_XE_COE_NAME

APAR status

• Closed as program error.

Error description

• Error Message: ** ASSERTION FAILED ** j9prt.748 at
  ./common/j9memtag.c:145
  Trc_Assert_PRT_memory_corruption_detected((memoryCorruptionDetec
  ted))
  Note, this error message is only issued in Java 626 and Java 7
  releases (2.6 VM and later)
  .
  Stack Trace: N/A
  .
  Memory overwrite occurs when the IBM_XE_COE_NAME environment
  variable is used to set up dumps on named Java exceptions. The
  overwrite is a single null byte after the end of a dump
  configuration string, for example:
  "events=throw,range=1..4,filter=<exceptionname>
  

Local fix

• Use -Xdump options instead of IBM_XE_COE_NAME
  

Problem summary

• Problem is caused when initialising a JVM dump configuration
  option supplied via the IBM_XE_COE_NAME environment variable
  

Problem conclusion

• This defect will be fixed in:
  5.0.0 SR14
  6.0.0 SR11
  6.0.1 SR3
  7.0.0 SR2
  .
  The JVM code has been fixed to prevent the memory overwrite
  

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:

  IV18976

Fix information

• Fixed component name

  JAVA 5 J9 COMMO

• Fixed component ID

  620500127

Applicable component levels

• R500 PSY

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