Apple MACOS X xnu <= 1228.3.13 ipv6-ipcomp remote kernel DoS POC

Posted today, "Apple MACOS X xnu <= 1228.3.13 ipv6-ipcomp remote kernel DoS POC" is a remote Denial of Service against OSX 10.5.1, 10.5.2, Freebsd 5.5, 4.9.0, and NetBSD 3.1.

It appears that the only reason for this DoS to exist is basically, a typo.

See? Copy and Paste from Exploit:
* ipcomp6_input does not verify the success of the first call
* to m_pulldown (m -> md typo?).
*
* md = m_pulldown(m, off, sizeof(*ipcomp), NULL);
* if (!m) {
*
* md = m_pulldown(m, off, sizeof(*ipcomp), NULL);
* if (!md) {"