11 files changed, 100 insertions, 46 deletions

diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index eaa150c33b04..d368cf249000 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -228,13 +228,14 @@ static int inet_create(struct socket *sock, int protocol)
         unsigned char answer_flags;
         char answer_no_check;
         int try_loading_module = 0;
-        int err = -ESOCKTNOSUPPORT;
+        int err;
 
         sock->state = SS_UNCONNECTED;
 
         /* Look for the requested type/protocol pair. */
         answer = NULL;
 lookup_protocol:
+        err = -ESOCKTNOSUPPORT;
         rcu_read_lock();
         list_for_each_rcu(p, &inetsw[sock->type]) {
                 answer = list_entry(p, struct inet_protosw, list);
@@ -252,6 +253,7 @@ lookup_protocol:
                         if (IPPROTO_IP == answer->protocol)
                                 break;
                 }
+                err = -EPROTONOSUPPORT;
                 answer = NULL;
         }
 
@@ -280,9 +282,6 @@ lookup_protocol:
         err = -EPERM;
         if (answer->capability > 0 && !capable(answer->capability))
                 goto out_rcu_unlock;
-        err = -EPROTONOSUPPORT;
-        if (!protocol)
-                goto out_rcu_unlock;
 
         sock->ops = answer->ops;
         answer_prot = answer->prot;
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 882f88f6d13b..19b1b984d687 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -544,12 +544,16 @@ static void nl_fib_input(struct sock *sk, int len)
         struct sk_buff *skb = NULL;
         struct nlmsghdr *nlh = NULL;
         struct fib_result_nl *frn;
-        int err;
         u32 pid;     
         struct fib_table *tb;
         
-        skb = skb_recv_datagram(sk, 0, 0, &err);
+        skb = skb_dequeue(&sk->sk_receive_queue);
         nlh = (struct nlmsghdr *)skb->data;
+        if (skb->len < NLMSG_SPACE(0) || skb->len < nlh->nlmsg_len ||
+            nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*frn))) {
+                kfree_skb(skb);
+                return;
+        }
         
         frn = (struct fib_result_nl *) NLMSG_DATA(nlh);
         tb = fib_get_table(frn->tb_id_in);
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index c04607b49212..4a195c724f01 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -897,7 +897,10 @@ int igmp_rcv(struct sk_buff *skb)
                 /* Is it our report looped back? */
                 if (((struct rtable*)skb->dst)->fl.iif == 0)
                         break;
-                igmp_heard_report(in_dev, ih->group);
+                /* don't rely on MC router hearing unicast reports */
+                if (skb->pkt_type == PACKET_MULTICAST ||
+                    skb->pkt_type == PACKET_BROADCAST)
+                        igmp_heard_report(in_dev, ih->group);
                 break;
         case IGMP_PIM:
 #ifdef CONFIG_IP_PIMSM_V1
diff --git a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c
index 625981676776..aeb7353d4777 100644
--- a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c
+++ b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c
@@ -272,9 +272,9 @@ static const enum tcp_conntrack tcp_conntracks[2][6][TCP_CONNTRACK_MAX] = {
  *      sCL -> sCL
  */
 /*           sNO, sSS, sSR, sES, sFW, sCW, sLA, sTW, sCL, sLI   */
-/*ack*/    { sIV, sIV, sSR, sES, sCW, sCW, sTW, sTW, sCL, sIV },
+/*ack*/    { sIV, sIG, sSR, sES, sCW, sCW, sTW, sTW, sCL, sIV },
 /*
- *      sSS -> sIV      Might be a half-open connection.
+ *      sSS -> sIG      Might be a half-open connection.
  *      sSR -> sSR      Might answer late resent SYN.
  *      sES -> sES      :-)
  *      sFW -> sCW      Normal close request answered by ACK.
@@ -917,8 +917,12 @@ static int tcp_packet(struct ip_conntrack *conntrack,
 
         switch (new_state) {
         case TCP_CONNTRACK_IGNORE:
-                /* Either SYN in ORIGINAL
-                 * or SYN/ACK in REPLY. */
+                /* Ignored packets:
+                 * 
+                 * a) SYN in ORIGINAL
+                 * b) SYN/ACK in REPLY
+                 * c) ACK in reply direction after initial SYN in original.
+                 */
                 if (index == TCP_SYNACK_SET
                     && conntrack->proto.tcp.last_index == TCP_SYN_SET
                     && conntrack->proto.tcp.last_dir != dir
@@ -985,13 +989,20 @@ static int tcp_packet(struct ip_conntrack *conntrack,
                 }
         case TCP_CONNTRACK_CLOSE:
                 if (index == TCP_RST_SET
-                    && test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)
-                    && conntrack->proto.tcp.last_index == TCP_SYN_SET
+                    && ((test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)
+                         && conntrack->proto.tcp.last_index == TCP_SYN_SET)
+                        || (!test_bit(IPS_ASSURED_BIT, &conntrack->status)
+                            && conntrack->proto.tcp.last_index == TCP_ACK_SET))
                     && ntohl(th->ack_seq) == conntrack->proto.tcp.last_end) {
-                        /* RST sent to invalid SYN we had let trough
-                         * SYN was in window then, tear down connection.
+                        /* RST sent to invalid SYN or ACK we had let trough
+                         * at a) and c) above:
+                         *
+                         * a) SYN was in window then
+                         * c) we hold a half-open connection.
+                         *
+                         * Delete our connection entry.
                          * We skip window checking, because packet might ACK
-                         * segments we ignored in the SYN. */
+                         * segments we ignored. */
                         goto in_window;
                 }
                 /* Just fall trough */
diff --git a/net/ipv4/netfilter/ipt_recent.c b/net/ipv4/netfilter/ipt_recent.c
index 2d44b07688af..261cbb4d4c49 100644
--- a/net/ipv4/netfilter/ipt_recent.c
+++ b/net/ipv4/netfilter/ipt_recent.c
@@ -532,6 +532,7 @@ match(const struct sk_buff *skb,
                         }
                         if(info->seconds && info->hit_count) {
                                 for(pkt_count = 0, hits_found = 0; pkt_count < ip_pkt_list_tot; pkt_count++) {
+                                        if(r_list[location].last_pkts[pkt_count] == 0) break;
                                         if(time_before_eq(now,r_list[location].last_pkts[pkt_count]+info->seconds*HZ)) hits_found++;
                                 }
                                 if(hits_found >= info->hit_count) ans = !info->invert; else ans = info->invert;
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index c63b8ce0e1b5..d9546380fa04 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -92,10 +92,13 @@ static int inet6_create(struct socket *sock, int protocol)
         struct proto *answer_prot;
         unsigned char answer_flags;
         char answer_no_check;
-        int rc;
+        int try_loading_module = 0;
+        int err;
 
         /* Look for the requested type/protocol pair. */
         answer = NULL;
+lookup_protocol:
+        err = -ESOCKTNOSUPPORT;
         rcu_read_lock();
         list_for_each_rcu(p, &inetsw6[sock->type]) {
                 answer = list_entry(p, struct inet_protosw, list);
@@ -113,21 +116,37 @@ static int inet6_create(struct socket *sock, int protocol)
                         if (IPPROTO_IP == answer->protocol)
                                 break;
                 }
+                err = -EPROTONOSUPPORT;
                 answer = NULL;
         }
 
-        rc = -ESOCKTNOSUPPORT;
-        if (!answer)
-                goto out_rcu_unlock;
-        rc = -EPERM;
+        if (!answer) {
+                if (try_loading_module < 2) {
+                        rcu_read_unlock();
+                        /*
+                         * Be more specific, e.g. net-pf-10-proto-132-type-1
+                         * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
+                         */
+                        if (++try_loading_module == 1)
+                                request_module("net-pf-%d-proto-%d-type-%d",
+                                                PF_INET6, protocol, sock->type);
+                        /*
+                         * Fall back to generic, e.g. net-pf-10-proto-132
+                         * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
+                         */
+                        else
+                                request_module("net-pf-%d-proto-%d",
+                                                PF_INET6, protocol);
+                        goto lookup_protocol;
+                } else
+                        goto out_rcu_unlock;
+        }
+
+        err = -EPERM;
         if (answer->capability > 0 && !capable(answer->capability))
                 goto out_rcu_unlock;
-        rc = -EPROTONOSUPPORT;
-        if (!protocol)
-                goto out_rcu_unlock;
 
         sock->ops = answer->ops;
-
         answer_prot = answer->prot;
         answer_no_check = answer->no_check;
         answer_flags = answer->flags;
@@ -135,14 +154,14 @@ static int inet6_create(struct socket *sock, int protocol)
 
         BUG_TRAP(answer_prot->slab != NULL);
 
-        rc = -ENOBUFS;
+        err = -ENOBUFS;
         sk = sk_alloc(PF_INET6, GFP_KERNEL, answer_prot, 1);
         if (sk == NULL)
                 goto out;
 
         sock_init_data(sock, sk);
 
-        rc = 0;
+        err = 0;
         sk->sk_no_check = answer_no_check;
         if (INET_PROTOSW_REUSE & answer_flags)
                 sk->sk_reuse = 1;
@@ -202,14 +221,14 @@ static int inet6_create(struct socket *sock, int protocol)
                 sk->sk_prot->hash(sk);
         }
         if (sk->sk_prot->init) {
-                rc = sk->sk_prot->init(sk);
-                if (rc) {
+                err = sk->sk_prot->init(sk);
+                if (err) {
                         sk_common_release(sk);
                         goto out;
                 }
         }
 out:
-        return rc;
+        return err;
 out_rcu_unlock:
         rcu_read_unlock();
         goto out;
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index f15e04ad026e..fd939da090c4 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -1231,6 +1231,11 @@ int igmp6_event_report(struct sk_buff *skb)
         if (skb->pkt_type == PACKET_LOOPBACK)
                 return 0;
 
+        /* send our report if the MC router may not have heard this report */
+        if (skb->pkt_type != PACKET_MULTICAST &&
+            skb->pkt_type != PACKET_BROADCAST)
+                return 0;
+
         if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
                 return -EINVAL;
 
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index 5a6fcf349bdf..6035633d8225 100644
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -280,9 +280,9 @@ static enum tcp_conntrack tcp_conntracks[2][6][TCP_CONNTRACK_MAX] = {
  *      sCL -> sCL
  */
 /*           sNO, sSS, sSR, sES, sFW, sCW, sLA, sTW, sCL, sLI   */
-/*ack*/    { sIV, sIV, sSR, sES, sCW, sCW, sTW, sTW, sCL, sIV },
+/*ack*/    { sIV, sIG, sSR, sES, sCW, sCW, sTW, sTW, sCL, sIV },
 /*
- *      sSS -> sIV      Might be a half-open connection.
+ *      sSS -> sIG      Might be a half-open connection.
  *      sSR -> sSR      Might answer late resent SYN.
  *      sES -> sES      :-)
  *      sFW -> sCW      Normal close request answered by ACK.
@@ -912,8 +912,12 @@ static int tcp_packet(struct nf_conn *conntrack,
 
         switch (new_state) {
         case TCP_CONNTRACK_IGNORE:
-                /* Either SYN in ORIGINAL
-                 * or SYN/ACK in REPLY. */
+                /* Ignored packets:
+                 *
+                 * a) SYN in ORIGINAL
+                 * b) SYN/ACK in REPLY
+                 * c) ACK in reply direction after initial SYN in original. 
+                 */
                 if (index == TCP_SYNACK_SET
                     && conntrack->proto.tcp.last_index == TCP_SYN_SET
                     && conntrack->proto.tcp.last_dir != dir
@@ -979,13 +983,20 @@ static int tcp_packet(struct nf_conn *conntrack,
                 }
         case TCP_CONNTRACK_CLOSE:
                 if (index == TCP_RST_SET
-                    && test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)
-                    && conntrack->proto.tcp.last_index == TCP_SYN_SET
+                    && ((test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)
+                         && conntrack->proto.tcp.last_index == TCP_SYN_SET)
+                        || (!test_bit(IPS_ASSURED_BIT, &conntrack->status)
+                            && conntrack->proto.tcp.last_index == TCP_ACK_SET))
                     && ntohl(th->ack_seq) == conntrack->proto.tcp.last_end) {
-                        /* RST sent to invalid SYN we had let trough
-                         * SYN was in window then, tear down connection.
+                        /* RST sent to invalid SYN or ACK we had let trough
+                         * at a) and c) above:
+                         *
+                         * a) SYN was in window then
+                         * c) we hold a half-open connection.
+                         *
+                         * Delete our connection entry.
                          * We skip window checking, because packet might ACK
-                         * segments we ignored in the SYN. */
+                         * segments we ignored. */
                         goto in_window;
                 }
                 /* Just fall trough */
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index abab81f3818f..d890dfa8818f 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4743,11 +4743,6 @@ static struct sk_buff *sctp_skb_recv_datagram(struct sock *sk, int flags,
         struct sk_buff *skb;
         long timeo;
 
-        /* Caller is allowed not to check sk->sk_err before calling.  */
-        error = sock_error(sk);
-        if (error)
-                goto no_packet;
-
         timeo = sock_rcvtimeo(sk, noblock);
 
         SCTP_DEBUG_PRINTK("Timeout: timeo: %ld, MAX: %ld.\n",
@@ -4774,6 +4769,11 @@ static struct sk_buff *sctp_skb_recv_datagram(struct sock *sk, int flags,
                 if (skb)
                         return skb;
 
+                /* Caller is allowed not to check sk->sk_err before calling. */
+                error = sock_error(sk);
+                if (error)
+                        goto no_packet;
+
                 if (sk->sk_shutdown & RCV_SHUTDOWN)
                         break;
 
diff --git a/net/sctp/transport.c b/net/sctp/transport.c
index 6bc27200e6ca..268ddaf2dc0f 100644
--- a/net/sctp/transport.c
+++ b/net/sctp/transport.c
@@ -261,7 +261,8 @@ void sctp_transport_route(struct sctp_transport *transport,
                  * association's active path for getsockname().
                  */ 
                 if (asoc && (transport == asoc->peer.active_path))
-                        af->to_sk_saddr(&transport->saddr, asoc->base.sk);
+                        opt->pf->af->to_sk_saddr(&transport->saddr,
+                                                 asoc->base.sk);
         } else
                 transport->pmtu = SCTP_DEFAULT_MAXSEGMENT;
 }
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index e3b242daf53c..c76ea221798c 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -59,7 +59,6 @@ __rpc_purge_upcall(struct inode *inode, int err)
         struct rpc_inode *rpci = RPC_I(inode);
 
         __rpc_purge_list(rpci, &rpci->pipe, err);
-        __rpc_purge_list(rpci, &rpci->in_upcall, err);
         rpci->pipelen = 0;
         wake_up(&rpci->waitq);
 }
@@ -119,6 +118,7 @@ rpc_close_pipes(struct inode *inode)
         down(&inode->i_sem);
         if (rpci->ops != NULL) {
                 rpci->nreaders = 0;
+                __rpc_purge_list(rpci, &rpci->in_upcall, -EPIPE);
                 __rpc_purge_upcall(inode, -EPIPE);
                 rpci->nwriters = 0;
                 if (rpci->ops->release_pipe)