> On Thu, 08 Nov 2007 11:57:26 +0900 Tetsuo Handa <[email protected]> wrote:
> Original patch assumed args->nlen < CTL_MAXNAME, but it can be false.
>
> Signed-off-by: Tetsuo Handa <[email protected]>
>
>
> --- linux-2.6.22-rc2.orig/kernel/sysctl.c 2007-11-08 10:38:17.000000000 +0900
> +++ linux-2.6.22-rc2/kernel/sysctl.c 2007-11-08 11:24:27.000000000 +0900
> @@ -2609,6 +2609,10 @@ static int deprecated_sysctl_warning(str
> int name[CTL_MAXNAME];
> int i;
>
> + /* Check args->nlen. */
> + if (args->nlen > CTL_MAXNAME)
> + return -EFAULT;
> +
> /* Read in the sysctl name for better debug message logging */
> for (i = 0; i < args->nlen; i++)
> if (get_user(name[i], args->name + i))
Well that would have been a nice roothole for someone. Thanks.
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