[PATCH 3/3] net: use strnstr() for lwip_strnstr()

[Jerome Forissier]

On 1/4/25 00:21, Heinrich Schuchardt wrote:
> Using strstr() instead of strnstr() creates a security concern.
> 
> Fixes: 1c41a7afaa15 ("net: lwip: build lwIP")
> Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
> ---
>  lib/lwip/u-boot/arch/cc.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/lib/lwip/u-boot/arch/cc.h b/lib/lwip/u-boot/arch/cc.h
> index de138846358..6104c296f6f 100644
> --- a/lib/lwip/u-boot/arch/cc.h
> +++ b/lib/lwip/u-boot/arch/cc.h
> @@ -34,7 +34,7 @@
>  	       x, __LINE__, __FILE__); } while (0)
>  
>  #define atoi(str) (int)dectoul(str, NULL)
> -#define lwip_strnstr(a, b, c)  strstr(a, b)
> +#define lwip_strnstr(a, b, c)  strnstr(a, b, c)
>  
>  #define LWIP_ERR_T int
>  #define LWIP_CONST_CAST(target_type, val) ((target_type)((uintptr_t)val))

Reviewed-by: Jerome Forissier <jerome.forissier at linaro.org>