Re: [PATCH v2] string: Introduce strtomem() and strtomem_pad()

From: Kees Cook
Date: Fri Sep 02 2022 - 16:52:45 EST


On Thu, Sep 01, 2022 at 12:34:34PM -0700, Guenter Roeck wrote:
> On 9/1/22 12:09, Kees Cook wrote:
> > [...]
> > -If a caller is using non-NUL-terminated strings, strncpy() can
> > -still be used, but destinations should be marked with the `__nonstring
> > +If a caller is using non-NUL-terminated strings, strtomem() should be
> > +be used, and the destinations should be marked with the `__nonstring
>
> s/be //

Thanks!

> > [...]
> > +++ b/include/linux/fortify-string.h
> > @@ -77,6 +77,36 @@ extern char *__underlying_strncpy(char *p, const char *q, __kernel_size_t size)
> > #define POS __pass_object_size(1)
> > #define POS0 __pass_object_size(0)
> > +/** strncpy - Copy a string to memory with non-guaranteed NUL padding
>
> Does that need a newline before strncpy() ?

What do you mean here? I think this is valid kerndoc, but I'll
double-check. (And will continue in the neighboring htmldoc build thread.)

-Kees

--
Kees Cook