The exploit is specifically designed to only work on a small subset of kernel builds, as indicated in the header:

   * In the interest of public safety, this exploit was specifically designed to
   * be limited:
   *
   *  * The particular symbols I resolve are not exported   on Slackware or Debian
   *  * Red Hat does not support Econet by default
   *  * CVE-2010-3849 and CVE-2010-3850 have both been patched by Ubuntu and
   *    Debian
   *
   * However, the important issue, CVE-2010-4258, affects everyone, and it would
   * be trivial to find an unpatched DoS under KERNEL_DS and write a slightly
   * more sophisticated version of this that doesn't have the roadblocks I put in
   * to prevent abuse by script kiddies.