Re: [PATCH] vmcore: replace strncpy with strtomem

[Justin Stitt]

Hi,

On Wed, Mar 27, 2024 at 6:48 PM Baoquan He <bhe@xxxxxxxxxx> wrote:
> > Mark these buffers as __nonstring and use strtomem_pad.
>
> Thanks.
>
> I didn't build, wondering if '__nonstring' has to be set so that
> strtomem_pad() can be used.

I do not believe marking buffers as __nonstring is strictly a
requirement. However, the documentation from string.h +302 says we
should do it:
/**
 * strtomem_pad - Copy NUL-terminated string to non-NUL-terminated buffer
 *
 * @dest: Pointer of destination character array (marked as __nonstring)
..

and so does [1] ... "mark the destination buffer variable (or
structure member) with the __nonstring attribute..."

FWIW, this builds just fine without the __nonstring attribute but we
should use it :)

>
> Thanks
> Baoquan
>

[1] https://github.com/KSPP/linux/issues/90

Thanks
Justin