[$] Dirty COW and clean commit messages

We live in an era of celebrity vulnerabilities; at the moment, anunpleasant kernel bug called "Dirty COW" (or CVE-2016-5195) is taking itsturn on the runway. This one is more disconcerting than many due to itsomnipresence and the ease with which it can be exploited. But there isalso some unhappiness in the wider community about how this vulnerabilityhas been handled by the kernel development community. It may well be timefor the kernel project to rethink its approach to serioussecurity problems.