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From: Sam Leffler <sam@FreeBSD.org>
To: Perforce Change Reviews <perforce@freebsd.org>
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Subject: PERFORCE change 133141 for review
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http://perforce.freebsd.org/chv.cgi?CH=133141

Change 133141 by sam@sam_ebb on 2008/01/12 23:50:11

	do a deep copy when distributing an mcast packet as ieee80211_decap
	blindly modifies the mbuf chain

Affected files ...

.. //depot/projects/vap/sys/net80211/ieee80211_input.c#24 edit

Differences ...

==== //depot/projects/vap/sys/net80211/ieee80211_input.c#24 (text+ko) ====

@@ -75,7 +75,11 @@
 		if (vap->iv_opmode == IEEE80211_M_WDS)
 			continue;
 		if (TAILQ_NEXT(vap, iv_next) != NULL) {
-			mcopy = m_copypacket(m, M_DONTWAIT);
+			/*
+			 * Packet contents are changed by ieee80211_decap
+			 * so do a deep copy of the packet.
+			 */
+			mcopy = m_dup(m, M_DONTWAIT);
 			if (mcopy == NULL) {
 				/* XXX stat+msg */
 				continue;