#AppArmor is an odd duck. It is trying to enforce profile rules for UNIX domain sockets based on their protocol field. Which probably bites you if you are a protocol #developer #scientist, or #financial trader, as it impacts production software critical to precision timing (#gpsd, #chronyd, #linuxptp, #ptpd2). This is despite the fact that most uses of #UNIX domain #sockets never even specify a protocol in their system calls to begin with... how bizarre.