GRsecurity violating GPLv2 themselves by prohibiting redistribution

This is not true whatsoever. The publicly available test patches always contain the latest features and research. But I suppose these are the "understandings" a person would come to when they get their information from lying internet trolls. The particular lie you're referring to involves someone complaining about the stable patches having a version of the size_overflow GCC plugin that is more "stable" (fewer false positives) because it also has much less code coverage. The only reason for this is that the test patches, being based off the latest Linux kernel, always have the latest (sometimes experimental) security features. In this case the size_overflow plugin received a large update recently in the test patches that allowed it to follow data flow through structure fields for use in detecting size-related integer overflows.
Only in the free software "community" would jerks complain about getting the latest security advances for free.

Please stop blindly repeating misinformation.

-Brad