Re: [PATCH v9 1/9] iov_iter: add copy_struct_from_iter()

[Linus Torvalds]

On Wed, Mar 31, 2021 at 11:51 PM Omar Sandoval <osan...@osandov.com> wrote:
>
> + *
> + * The recommended usage is something like the following:
> + *
> + *     if (usize > PAGE_SIZE)
> + *       return -E2BIG;

Maybe this should be more than a recommendation, and just be inside
copy_struct_from_iter(), because otherwise the "check_zeroed_user()"
call might be quite the timesink for somebody who does something
stupid.

But otherwise this new version (still) looks fine to me.

            Linus