sctp: bail from sctp_endpoint_lookup_assoc() if not bound
The sctp_endpoint_lookup_assoc() function uses a port hash to lookup the association and then checks to see if any of them are on the current endpoint. However, if the current endpoint is not bound, there can't be any associations on it, thus we can bail early. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -325,6 +325,7 @@ static struct sctp_association *__sctp_endpoint_lookup_assoc(
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struct sctp_transport **transport)
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{
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struct sctp_association *asoc = NULL;
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struct sctp_association *tmp;
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struct sctp_transport *t = NULL;
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struct sctp_hashbucket *head;
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struct sctp_ep_common *epb;
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@ -333,25 +334,32 @@ static struct sctp_association *__sctp_endpoint_lookup_assoc(
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int rport;
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*transport = NULL;
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/* If the local port is not set, there can't be any associations
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* on this endpoint.
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*/
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if (!ep->base.bind_addr.port)
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goto out;
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rport = ntohs(paddr->v4.sin_port);
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hash = sctp_assoc_hashfn(ep->base.bind_addr.port, rport);
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head = &sctp_assoc_hashtable[hash];
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read_lock(&head->lock);
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sctp_for_each_hentry(epb, node, &head->chain) {
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asoc = sctp_assoc(epb);
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if (asoc->ep != ep || rport != asoc->peer.port)
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goto next;
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tmp = sctp_assoc(epb);
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if (tmp->ep != ep || rport != tmp->peer.port)
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continue;
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t = sctp_assoc_lookup_paddr(asoc, paddr);
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t = sctp_assoc_lookup_paddr(tmp, paddr);
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if (t) {
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asoc = tmp;
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*transport = t;
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break;
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}
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next:
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asoc = NULL;
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}
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read_unlock(&head->lock);
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out:
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return asoc;
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}
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