diff options
| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-12-31 12:48:55 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-12-31 12:48:55 -0800 |
| commit | 18c8d82ae5b802c5d82e0dfbcc08b1b568955f46 (patch) | |
| tree | 6a9ff2bc889e63494b5636e9dbe8b8c9a5e296af /net/sched | |
| parent | eeaeb068f1393b4db4861481bf594bcd1c3eda7a (diff) | |
| download | lwn-18c8d82ae5b802c5d82e0dfbcc08b1b568955f46.tar.gz lwn-18c8d82ae5b802c5d82e0dfbcc08b1b568955f46.zip | |
sfq: fix slot_dequeue_head()
slot_dequeue_head() should make sure slot skb chain is correct in both
ways, or we can crash if all possible flows are in use.
Jarek pointed out slot_queue_init() can now be done in sfq_init() once,
instead each time a flow is setup.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
| -rw-r--r-- | net/sched/sch_sfq.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c index b76d46b71466..d54ac94066c2 100644 --- a/net/sched/sch_sfq.c +++ b/net/sched/sch_sfq.c @@ -297,6 +297,7 @@ static inline struct sk_buff *slot_dequeue_head(struct sfq_slot *slot) struct sk_buff *skb = slot->skblist_next; slot->skblist_next = skb->next; + skb->next->prev = (struct sk_buff *)slot; skb->next = skb->prev = NULL; return skb; } @@ -380,7 +381,6 @@ sfq_enqueue(struct sk_buff *skb, struct Qdisc *sch) q->ht[hash] = x; slot = &q->slots[x]; slot->hash = hash; - slot_queue_init(slot); } /* If selected queue has length q->limit, do simple tail drop, @@ -545,8 +545,10 @@ static int sfq_init(struct Qdisc *sch, struct nlattr *opt) return err; } - for (i = 0; i < SFQ_SLOTS; i++) + for (i = 0; i < SFQ_SLOTS; i++) { + slot_queue_init(&q->slots[i]); sfq_link(q, i); + } return 0; } |