Re: [patch 4/4] c/r: prctl: Extend PR_SET_MM to set up more mm_struct entries

From: Kees Cook
Date: Fri Feb 03 2012 - 11:56:19 EST

On Fri, Feb 3, 2012 at 7:19 AM, Cyrill Gorcunov <gorcunov@xxxxxxxxxx> wrote:
> +       case PR_SET_MM_AUXV: {
> +               unsigned long user_auxv[AT_VECTOR_SIZE];
> +
> +               if (arg4 > sizeof(mm->saved_auxv))
> +                       goto out;

While these are both AT_VECTOR_SIZE, I think it might be better to use
sizeof(mm->saved_auxv) instead of AT_VECTOR_SIZE, just so that they
can never get out sync and there's a single reference for the size.


Kees Cook
ChromeOS Security
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at