Re: [PATCH v2] aoe: replace strncpy with strscpy

[Kees Cook]

On Tue, Sep 19, 2023 at 05:27:45AM +0000, Justin Stitt wrote:
> `strncpy` is deprecated for use on NUL-terminated destination strings [1].
> 
> `aoe_iflist` is expected to be NUL-terminated which is evident by its
> use with string apis later on like `strspn`:
> | 	p = aoe_iflist + strspn(aoe_iflist, WHITESPACE);
> 
> It also seems `aoe_iflist` does not need to be NUL-padded which means
> `strscpy` [2] is a suitable replacement due to the fact that it
> guarantees NUL-termination on the destination buffer while not
> unnecessarily NUL-padding.
> 
> Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1]
> Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2]
> Link: https://github.com/KSPP/linux/issues/90
> Cc: linux-hardening@xxxxxxxxxxxxxxx
> Cc: Kees Cook <keescook@xxxxxxxxxxxx>
> Cc: Xu Panda <xu.panda@xxxxxxxxxx>
> Cc: Yang Yang <yang.yang29@xxxxxxx>
> Signed-off-by: Justin Stitt <justinstitt@xxxxxxxxxx>

Looks right. Thanks!

Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>

-- 
Kees Cook