Re: [PATCH v2 1/6] uaccess: Add copy_from_user_nul helper

[Alice Ryhl]

On Mon, Jan 12, 2026 at 5:28 PM Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
>
> On Mon, 12 Jan 2026 15:40:53 +0000
> Alice Ryhl <aliceryhl@xxxxxxxxxx> wrote:
>
> > I'm getting the impression that strncpy_from_user() is the real problem
> > here. It should append a nul byte.
> >
> > That would also be a lot less error-prone than the suggested new API.
> > Requiring a length of N+1 is not the most immediately-obvious API.
>
> Should we make a strscpy_from_user() API that acts the same as strscpy()
> but from user space?

Sounds quite reasonable to me.

Alice