Docker just resolved a critical compatibility issue it had with most reasonably useful configurations of grsec... see <a href="https:&#x2F;&#x2F;github.com&#x2F;docker&#x2F;docker&#x2F;issues&#x2F;20303" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;docker&#x2F;docker&#x2F;issues&#x2F;20303</a> which I opened, and <a href="https:&#x2F;&#x2F;github.com&#x2F;docker&#x2F;docker&#x2F;pull&#x2F;22506" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;docker&#x2F;docker&#x2F;pull&#x2F;22506</a> which solved it.