Grsecurity: Potential contributory infringement and breach of contract risk
Edit:<p>I replied too soon and misunderstood the core of Peren&#x27;s argument.<p>His claim is that by withdrawing support if a customer redistributes the grsecurity patch (which absolutely <i>is</i> licensed under the GPLv2), that amounts to adding a clause to the GPL due to the penalty this imposes.<p>At issue is this agreement:<p><a href="https:&#x2F;&#x2F;grsecurity.net&#x2F;agree&#x2F;agreement.php" rel="nofollow">https:&#x2F;&#x2F;grsecurity.net&#x2F;agree&#x2F;agreement.php</a><p>This clearly represents additional conditions imposed on the software.  Seems like a grey area as to whether those conditions at enough to violate the GPL under which the Linux kernel is licensed.<p>Original comment:<p>I don&#x27;t buy it.<p>Grsecurity isn&#x27;t distributed as a derivative work of the Linux kernel.<p>Just because it&#x27;s useless without the kernel doesn&#x27;t make it a derivative work.  By that logic, Nvidia&#x27;s closed source driver would qualify as a derivative work and fall under the GPL.