On Tue, Jun 1, 2021 at 6:32 PM Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote: > On Tue, Jun 01, 2021 at 02:42:15PM +0000, Justin He wrote: ... > Just don't put anything > in the buffer if the user didn't supply enough space. As long as you > get the return value right, they know the string is bad (or they don't > care if the string is bad) It might be that I'm out of context here, but printf() functionality in the kernel (vsprintf() if being precise) and its users consider that it should fill buffer up to the end of whatever space is available. -- With Best Regards, Andy Shevchenko
