This file contains post-release ERRATA for altq-2.0.

Currently 1 problem is listed.

1. ethernet bridging panics under heavy load  (1999/10/11)
	
    Problem description:
	When the queue is full, mbuf is freed twice.
	This leads to a kernel panic.

    Solution:
	Appy the following patch to sys-altq/net/bridge.c.
	The patch is for FreeBSD-3.3 but also applies to 2.8/3.2.

    The fix is submitted by "Santa Wiryaman" <santaw@sitaranetworks.com>.

--- bridge.c-	Mon Oct 11 14:50:18 1999
+++ bridge.c	Mon Oct 11 14:58:16 1999
@@ -630,10 +630,14 @@
 			    if (m->m_flags & M_MCAST)
 				    ifp->if_omcasts++;
 			    splx(s);
-			    if (m == *m0)
-				    *m0 = NULL ; /* the packet is gone... */
-			    m = NULL ;
 		    }
+		    /*
+		     * when enqueue fails, mbuf is freed by if_altqenqueue.
+		     * we need to clear m regardless of the return value.
+		     */
+		    if (m == *m0)
+			    *m0 = NULL ; /* the packet is gone... */
+		    m = NULL ;
 	    }
 	    else {
 #endif /* ALTQ */