On 2020/05/10 9:57, Linus Torvalds wrote: > On Sat, May 9, 2020 at 5:51 PM Tetsuo Handa > <penguin-kernel@xxxxxxxxxxxxxxxxxxx> wrote: >> >> I think that this access_ok() check helps reducing partial writes (either >> "whole amount was processed" or "not processed at all" unless -ENOMEM). > > No it doesn't. > > "access_ok()" only checks the range being a valid user address range. > I see. Thank you. Acked-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
