A set of crash vulnerabilities in the OpenJDK font processing routines
have been detected. They crash the VM on F10 and F11, EL5 packages did not crash.  

To start the reproducer use: 

java FontFuzzRandom /usr/share/fonts/lohit-oriya/lohit_or.ttf


#
# A fatal error has been detected by the Java Runtime Environment:
#
#  Internal Error (nmethod.cpp:1851), pid=16913, tid=20683664
#  Error: guarantee(cont_offset != 0,"unhandled implicit exception in compiled c
ode")
#

or 

#  SIGSEGV (0xb) at pc=0x00f89a4d, pid=21610, tid=85552016
#
# JRE version: 6.0-b16
# Java VM: OpenJDK Client VM (14.0-b15 mixed mode linux-x86 )
# Distribution: Custom build (Thu Jul  9 14:26:35 EDT 2009)
# Problematic frame:
# J  java.lang.StringCoding$StringEncoder.encode([CII)[B


As font data can be supplied via untrusted client code, 
the parsing methods should be checked for proper behavior.