alt Hacker NewsInteresting! Looks like a race condition (with a 1ms window) during squawk allocation (the process that gives each aircraft a 4 digit identifier for ATC purposes) caused data corruption. They present that window as being small but 1ms is a decent chunk of time in our work lol
More specifically: it sounds like something which was supposed to be an atomic operation was split into two by the preempting task, with corruption happening because that task also interacted with the same piece of (now-temporarily-invalid) data.