Andy Lutomirski seems to think that it is a bug: https://lore.kernel.org/all/CALCETrXbj__SFQMzPZhES5y6-sh4np-ZHY5T_=4QY5+Fn8BM4A@mail.gmail.com/ https://lore.ke

Andy Lutomirski seems to think that it is a bug: https://lore.kernel.org/all/CALCETrXbj__SFQMzPZhES5y6-sh4np-ZHY5T_=4QY5+Fn8BM4A@mail.gmail.com/ https://lore.kernel.org/all/CALCETrXbj__SFQMzPZhES5y6-sh4np-... I looked at the explanation, and it seems to be at very least plausible. The kernel version bisection also lines up. We'll see if the proposed patch fixes this.