[PATCH] wifi: mt76: Replace strlcpy with strscpy

Kees Cook keescook at chromium.org
Wed Jul 12 16:54:26 PDT 2023


On Mon, Jul 03, 2023 at 06:12:56PM +0000, Azeem Shaikh wrote:
> strlcpy() reads the entire source buffer first.
> This read may exceed the destination size limit.
> This is both inefficient and can lead to linear read
> overflows if a source string is not NUL-terminated [1].
> In an effort to remove strlcpy() completely [2], replace
> strlcpy() here with strscpy().
> 
> Direct replacement is safe here since DEV_ASSIGN is only used by
> TRACE macros and the return values are ignored.
> 
> [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
> [2] https://github.com/KSPP/linux/issues/89
> 
> Signed-off-by: Azeem Shaikh <azeemshaikh38 at gmail.com>

Looks good -- thing is using return values from the macros.

Reviewed-by: Kees Cook <keescook at chromium.org>

-- 
Kees Cook



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