On Thu, 29 Jun 2023 at 22:59, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > gup: add warning if some caller would seem to want stack expansion Did you decide to take that one after all? It's not exactly wrong, and it might help find any odd cases, but I do suspect you can get syzbot etc to trigger the warning. It's designed to find crazy users, and syzbot is - pretty much by definition and by design - one of the craziest out there. Linus