From: Jamal Hadi Salim <hadi@cyberus.ca>
Date: Tue, 15 May 2007 08:23:46 +0000 (-0700)
Subject: [PATCH] NET_SCHED: prio qdisc boundary condition
X-Git-Tag: v2.6.21.2~19
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7b890c17f74b976f82e38b84d29724212fccb91a;p=thirdparty%2Fkernel%2Fstable.git

[PATCH] NET_SCHED: prio qdisc boundary condition

This fixes an out-of-boundary condition when the classified
band equals q->bands. Caught by Alexey

Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
---

diff --git a/net/sched/sch_prio.c b/net/sched/sch_prio.c
index de889f23f22a5..a86f36b07375e 100644
--- a/net/sched/sch_prio.c
+++ b/net/sched/sch_prio.c
@@ -74,7 +74,7 @@ prio_classify(struct sk_buff *skb, struct Qdisc *sch, int *qerr)
 		band = res.classid;
 	}
 	band = TC_H_MIN(band) - 1;
-	if (band > q->bands)
+	if (band >= q->bands)
 		return q->queues[q->prio2band[0]];
 
 	return q->queues[band];