5 files changed, 67 insertions, 19 deletions

diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index fc920f63452b..cac06c43f004 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -776,6 +776,8 @@ static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb )
                                        .nl_u = { .ip4_u = { .daddr = frn->fl_addr,
                                                             .tos = frn->fl_tos,
                                                             .scope = frn->fl_scope } } };
+
+        frn->err = -ENOENT;
         if (tb) {
                 local_bh_disable();
 
@@ -787,6 +789,7 @@ static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb )
                         frn->nh_sel = res.nh_sel;
                         frn->type = res.type;
                         frn->scope = res.scope;
+                        fib_res_put(&res);
                 }
                 local_bh_enable();
         }
@@ -801,6 +804,9 @@ static void nl_fib_input(struct sock *sk, int len)
         struct fib_table *tb;
 
         skb = skb_dequeue(&sk->sk_receive_queue);
+        if (skb == NULL)
+                return;
+
         nlh = (struct nlmsghdr *)skb->data;
         if (skb->len < NLMSG_SPACE(0) || skb->len < nlh->nlmsg_len ||
             nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*frn))) {
@@ -813,7 +819,7 @@ static void nl_fib_input(struct sock *sk, int len)
 
         nl_fib_lookup(frn, tb);
 
-        pid = nlh->nlmsg_pid;           /*pid of sending process */
+        pid = NETLINK_CB(skb).pid;       /* pid of sending process */
         NETLINK_CB(skb).pid = 0;         /* from kernel */
         NETLINK_CB(skb).dst_group = 0;  /* unicast */
         netlink_unicast(sk, skb, pid, MSG_DONTWAIT);
diff --git a/net/ipv4/tcp_cong.c b/net/ipv4/tcp_cong.c
index 5c8caf4a1244..34ae3f13483a 100644
--- a/net/ipv4/tcp_cong.c
+++ b/net/ipv4/tcp_cong.c
@@ -77,18 +77,19 @@ void tcp_init_congestion_control(struct sock *sk)
         struct inet_connection_sock *icsk = inet_csk(sk);
         struct tcp_congestion_ops *ca;
 
-        if (icsk->icsk_ca_ops != &tcp_init_congestion_ops)
-                return;
+        /* if no choice made yet assign the current value set as default */
+        if (icsk->icsk_ca_ops == &tcp_init_congestion_ops) {
+                rcu_read_lock();
+                list_for_each_entry_rcu(ca, &tcp_cong_list, list) {
+                        if (try_module_get(ca->owner)) {
+                                icsk->icsk_ca_ops = ca;
+                                break;
+                        }
 
-        rcu_read_lock();
-        list_for_each_entry_rcu(ca, &tcp_cong_list, list) {
-                if (try_module_get(ca->owner)) {
-                        icsk->icsk_ca_ops = ca;
-                        break;
+                        /* fallback to next available */
                 }
-
+                rcu_read_unlock();
         }
-        rcu_read_unlock();
 
         if (icsk->icsk_ca_ops->init)
                 icsk->icsk_ca_ops->init(sk);
@@ -236,6 +237,7 @@ int tcp_set_congestion_control(struct sock *sk, const char *name)
 
         rcu_read_lock();
         ca = tcp_ca_find(name);
+
         /* no change asking for existing value */
         if (ca == icsk->icsk_ca_ops)
                 goto out;
@@ -261,7 +263,8 @@ int tcp_set_congestion_control(struct sock *sk, const char *name)
         else {
                 tcp_cleanup_congestion_control(sk);
                 icsk->icsk_ca_ops = ca;
-                if (icsk->icsk_ca_ops->init)
+
+                if (sk->sk_state != TCP_CLOSE && icsk->icsk_ca_ops->init)
                         icsk->icsk_ca_ops->init(sk);
         }
  out:
diff --git a/net/ipv4/xfrm4_mode_beet.c b/net/ipv4/xfrm4_mode_beet.c
index f68dfd8a0f5c..d419e15d9803 100644
--- a/net/ipv4/xfrm4_mode_beet.c
+++ b/net/ipv4/xfrm4_mode_beet.c
@@ -52,7 +52,7 @@ static int xfrm4_beet_output(struct xfrm_state *x, struct sk_buff *skb)
 
                 ph = (struct ip_beet_phdr *)skb->h.raw;
                 ph->padlen = 4 - (optlen & 4);
-                ph->hdrlen = (optlen + ph->padlen + sizeof(*ph)) / 8;
+                ph->hdrlen = optlen / 8;
                 ph->nexthdr = top_iph->protocol;
                 if (ph->padlen)
                         memset(ph + 1, IPOPT_NOP, ph->padlen);
@@ -85,7 +85,7 @@ static int xfrm4_beet_input(struct xfrm_state *x, struct sk_buff *skb)
                 ph = (struct ip_beet_phdr *)(skb->h.ipiph + 1);
 
                 phlen = sizeof(*ph) + ph->padlen;
-                optlen = ph->hdrlen * 8 - phlen;
+                optlen = ph->hdrlen * 8 + (IPV4_BEET_PHMAXLEN - phlen);
                 if (optlen < 0 || optlen & 3 || optlen > 250)
                         goto out;
 
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 7552663aa125..452a82ce4796 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -172,6 +172,7 @@ struct ipv6_devconf ipv6_devconf __read_mostly = {
 #endif
 #endif
         .proxy_ndp              = 0,
+        .accept_source_route    = 0,    /* we do not accept RH0 by default. */
 };
 
 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
@@ -203,6 +204,7 @@ static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
 #endif
 #endif
         .proxy_ndp              = 0,
+        .accept_source_route    = 0,    /* we do not accept RH0 by default. */
 };
 
 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
@@ -3356,6 +3358,7 @@ static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
 #endif
 #endif
         array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
+        array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
 }
 
 static inline size_t inet6_if_nlmsg_size(void)
@@ -3884,6 +3887,14 @@ static struct addrconf_sysctl_table
                         .proc_handler   =       &proc_dointvec,
                 },
                 {
+                        .ctl_name       =       NET_IPV6_ACCEPT_SOURCE_ROUTE,
+                        .procname       =       "accept_source_route",
+                        .data           =       &ipv6_devconf.accept_source_route,
+                        .maxlen         =       sizeof(int),
+                        .mode           =       0644,
+                        .proc_handler   =       &proc_dointvec,
+                },
+                {
                         .ctl_name       =       0,      /* sentinel */
                 }
         },
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 28e0c6568272..fb39604c3d09 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -362,10 +362,27 @@ static int ipv6_rthdr_rcv(struct sk_buff **skbp)
         struct inet6_skb_parm *opt = IP6CB(skb);
         struct in6_addr *addr = NULL;
         struct in6_addr daddr;
+        struct inet6_dev *idev;
         int n, i;
-
         struct ipv6_rt_hdr *hdr;
         struct rt0_hdr *rthdr;
+        int accept_source_route = ipv6_devconf.accept_source_route;
+
+        if (accept_source_route < 0 ||
+            ((idev = in6_dev_get(skb->dev)) == NULL)) {
+                kfree_skb(skb);
+                return -1;
+        }
+        if (idev->cnf.accept_source_route < 0) {
+                in6_dev_put(idev);
+                kfree_skb(skb);
+                return -1;
+        }
+
+        if (accept_source_route > idev->cnf.accept_source_route)
+                accept_source_route = idev->cnf.accept_source_route;
+
+        in6_dev_put(idev);
 
         if (!pskb_may_pull(skb, (skb->h.raw-skb->data)+8) ||
             !pskb_may_pull(skb, (skb->h.raw-skb->data)+((skb->h.raw[1]+1)<<3))) {
@@ -377,6 +394,22 @@ static int ipv6_rthdr_rcv(struct sk_buff **skbp)
 
         hdr = (struct ipv6_rt_hdr *) skb->h.raw;
 
+        switch (hdr->type) {
+#ifdef CONFIG_IPV6_MIP6
+                break;
+#endif
+        case IPV6_SRCRT_TYPE_0:
+                if (accept_source_route > 0)
+                        break;
+                kfree_skb(skb);
+                return -1;
+        default:
+                IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
+                                 IPSTATS_MIB_INHDRERRORS);
+                icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, (&hdr->type) - skb->nh.raw);
+                return -1;
+        }
+
         if (ipv6_addr_is_multicast(&skb->nh.ipv6h->daddr) ||
             skb->pkt_type != PACKET_HOST) {
                 IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
@@ -434,11 +467,6 @@ looped_back:
                 }
                 break;
 #endif
-        default:
-                IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
-                                 IPSTATS_MIB_INHDRERRORS);
-                icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, (&hdr->type) - skb->nh.raw);
-                return -1;
         }
 
         /*