The fix 6374692 will quietly report when page 0 is mmapped on solaris but we should probably come up with a more comprehensive fix since it's so tedious to diagnose when it occurs. The VM should either forcibly mmap page 0 in CreateJavaJVM or it should refuse to run if it's that page is mapped or if it's possible for it to be mmaped as a result of an unlimited stack. It may also be worth backporting as well.