D49840.id153691.diff
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D49840.id153691.diff
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	diff --git a/sys/netinet6/udp6_usrreq.c b/sys/netinet6/udp6_usrreq.c
	--- a/sys/netinet6/udp6_usrreq.c
	+++ b/sys/netinet6/udp6_usrreq.c
	@@ -860,14 +860,18 @@
	hlen = sizeof(struct ip6_hdr);

	/*
	- * Calculate data length and get a mbuf
	- * for UDP and IP6 headers.
	+ * Calculate data length and get a mbuf for UDP, IP6, and possible
	+ * link-layer headers. Immediate slide the data pointer back forward
	+ * since we won't use that space at this layer.
	*/
	- M_PREPEND(m, hlen + sizeof(struct udphdr), M_NOWAIT);
	+ M_PREPEND(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr) + max_linkhdr, M_NOWAIT);
	if (m == NULL) {
	error = ENOBUFS;
	goto release;
	}
	+ m->m_data += max_linkhdr;
	+ m->m_len -= max_linkhdr;
	+ m->m_pkthdr.len -= max_linkhdr;

	/*
	* Stuff checksum and output datagram.