Adding a selftest for someone else's fix

Note: This will be a casual blog, so excuse my language. It&rsquo;s mostly stuff for documentation (for my brain). The goal lore.kernel.org is the conversation I came across earlier today. I want to quickly send in a selftest before the original author does to better my understanding of the verifier. Finding out what the fix actually did We will be doing this by backtracing from the function to…