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[NET_SCHED]: Fix prio/ingress classification logic error

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Fix handling of empty or completely non-matching filter chains. In
that case -1 is returned and tcf_result is uninitialized, the
qdisc should fall back to default classification in that case.

Noticed by PJ Waskiewicz <peter.p.waskiewicz.jr@intel.com>.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2007-07-30 17:07:14 -07:00 committed by David S. Miller
parent 20283d84c7
commit bdba91ec70
2 changed files with 4 additions and 6 deletions
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3
net/sched/sch_ingress.c
View File

@ -158,9 +158,8 @@ static int ingress_enqueue(struct sk_buff *skb,struct Qdisc *sch)
break;
case TC_ACT_RECLASSIFY:
case TC_ACT_OK:
case TC_ACT_UNSPEC:
default:
skb->tc_index = TC_H_MIN(res.classid);
default:
result = TC_ACT_OK;
break;
}

7
net/sched/sch_prio.c
View File

@ -38,9 +38,11 @@ prio_classify(struct sk_buff *skb, struct Qdisc *sch, int *qerr)
struct prio_sched_data *q = qdisc_priv(sch);
u32 band = skb->priority;
struct tcf_result res;
int err;
*qerr = NET_XMIT_BYPASS;
if (TC_H_MAJ(skb->priority) != sch->handle) {
err = tc_classify(skb, q->filter_list, &res);
#ifdef CONFIG_NET_CLS_ACT
switch (tc_classify(skb, q->filter_list, &res)) {
case TC_ACT_STOLEN:
@ -49,11 +51,8 @@ prio_classify(struct sk_buff *skb, struct Qdisc *sch, int *qerr)
case TC_ACT_SHOT:
return NULL;
}
if (!q->filter_list ) {
#else
if (!q->filter_list || tc_classify(skb, q->filter_list, &res)) {
#endif
if (!q->filter_list || err < 0) {
if (TC_H_MAJ(band))
band = 0;
band = q->prio2band[band&TC_PRIO_MAX];