IZ66721: *JAVA 5*AIX*CRASH IN LIBZIP.A NATIVE LIBRARY

APAR status

• Closed as program error.

Error description

• Error Message: J9Generic_Signal_Number=00000004
  Signal_Number=0000000b
  Segmentation Error
  .
  Stack Trace: Java Stack Frame:
  java.util.zip.ZipFile.open()
  
    java.util.zip.ZipFile.<init>(ZipFile.java:241)
  
    java.util.zip.ZipFile.<init>(ZipFile.java:122)
  Native Stack Frame:
  
  /usr/lib/libc.a(shr.o)::.leftmost+0x2c
  
  /usr/lib/libc.a(shr.o)::_$STATIC+0x4
  
  /usr/WebSphere/AppServer/java/jre/bin/libwrappers.a::malloc+0x44
  
  /usr/WebSphere/AppServer/java/jre/bin/libzip.a::+0x28
         java::_$STATIC_BSS+0x1705b98
  .
  N/A
  

Local fix

Problem summary

• It is found that static 256-byte string buffer used by
  JVM_GetLastErrorString() then by dbgStrdup
  () inside ZIP_Put_In_Cache() is simultaneously accessed by
  multiple threads, causing static string buffer modifie
  d by another thread during dbgStrdup().
  

Problem conclusion

• This defect will be fixed in:
  5.0.0 SR11 FP1
  .
  The fix provided here is to allocate 256-byte string buffer on
  stack instead of using common s
  tatic 256-byte string buffer.
  .
  To obtain the fix:
  Install build 20100110 or later
  

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:

  IZ66875

Fix information

• Fixed component name

  JAVA 5 CLASS LI

• Fixed component ID

  620500130

Applicable component levels

• R500 PSN

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