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| author | Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> | 2007-09-19 10:42:03 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-09-20 12:14:08 -0700 |
| commit | 5588b40d7c2bff75ee573ed42d1738c73ce24492 (patch) | |
| tree | ab075cd6d417054139ce9b0d90c4fff5aa59ab0a /net/sched | |
| parent | 1a03b81db96aeaac0276224f25c0701a1ba37318 (diff) | |
| download | linux-stable-5588b40d7c2bff75ee573ed42d1738c73ce24492.tar.gz linux-stable-5588b40d7c2bff75ee573ed42d1738c73ce24492.tar.bz2 linux-stable-5588b40d7c2bff75ee573ed42d1738c73ce24492.zip | |
[PKT_SCHED]: Fix 'SFQ qdisc crashes with limit of 2 packets'
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
| -rw-r--r-- | net/sched/sch_sfq.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c index 957957309859..3a23e30bc79e 100644 --- a/net/sched/sch_sfq.c +++ b/net/sched/sch_sfq.c @@ -270,7 +270,7 @@ sfq_enqueue(struct sk_buff *skb, struct Qdisc* sch) q->tail = x; } } - if (++sch->q.qlen < q->limit-1) { + if (++sch->q.qlen <= q->limit) { sch->bstats.bytes += skb->len; sch->bstats.packets++; return 0; @@ -306,7 +306,7 @@ sfq_requeue(struct sk_buff *skb, struct Qdisc* sch) q->tail = x; } } - if (++sch->q.qlen < q->limit - 1) { + if (++sch->q.qlen <= q->limit) { sch->qstats.requeues++; return 0; } @@ -391,10 +391,10 @@ static int sfq_change(struct Qdisc *sch, struct rtattr *opt) q->quantum = ctl->quantum ? : psched_mtu(sch->dev); q->perturb_period = ctl->perturb_period*HZ; if (ctl->limit) - q->limit = min_t(u32, ctl->limit, SFQ_DEPTH); + q->limit = min_t(u32, ctl->limit, SFQ_DEPTH - 2); qlen = sch->q.qlen; - while (sch->q.qlen >= q->limit-1) + while (sch->q.qlen > q->limit) sfq_drop(sch); qdisc_tree_decrease_qlen(sch, qlen - sch->q.qlen); @@ -423,7 +423,7 @@ static int sfq_init(struct Qdisc *sch, struct rtattr *opt) q->dep[i+SFQ_DEPTH].next = i+SFQ_DEPTH; q->dep[i+SFQ_DEPTH].prev = i+SFQ_DEPTH; } - q->limit = SFQ_DEPTH; + q->limit = SFQ_DEPTH - 2; q->max_depth = 0; q->tail = SFQ_DEPTH; if (opt == NULL) { |