4 files changed, 91 insertions, 17 deletions

diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 860558633b2..55c355e6323 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -204,18 +204,22 @@ static struct sock *icmp_sk(struct net *net)
 	return net->ipv4.icmp_sk[smp_processor_id()];
 }
 
-static inline int icmp_xmit_lock(struct sock *sk)
+static inline struct sock *icmp_xmit_lock(struct net *net)
 {
+	struct sock *sk;
+
 	local_bh_disable();
 
+	sk = icmp_sk(net);
+
 	if (unlikely(!spin_trylock(&sk->sk_lock.slock))) {
 		/* This can happen if the output path signals a
 		 * dst_link_failure() for an outgoing ICMP packet.
 		 */
 		local_bh_enable();
-		return 1;
+		return NULL;
 	}
-	return 0;
+	return sk;
 }
 
 static inline void icmp_xmit_unlock(struct sock *sk)
@@ -354,15 +358,17 @@ static void icmp_reply(struct icmp_bxm *icmp_param, struct sk_buff *skb)
 	struct ipcm_cookie ipc;
 	struct rtable *rt = skb->rtable;
 	struct net *net = dev_net(rt->u.dst.dev);
-	struct sock *sk = icmp_sk(net);
-	struct inet_sock *inet = inet_sk(sk);
+	struct sock *sk;
+	struct inet_sock *inet;
 	__be32 daddr;
 
 	if (ip_options_echo(&icmp_param->replyopts, skb))
 		return;
 
-	if (icmp_xmit_lock(sk))
+	sk = icmp_xmit_lock(net);
+	if (sk == NULL)
 		return;
+	inet = inet_sk(sk);
 
 	icmp_param->data.icmph.checksum = 0;
 
@@ -419,7 +425,6 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
 	if (!rt)
 		goto out;
 	net = dev_net(rt->u.dst.dev);
-	sk = icmp_sk(net);
 
 	/*
 	 *	Find the original header. It is expected to be valid, of course.
@@ -483,7 +488,8 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
 		}
 	}
 
-	if (icmp_xmit_lock(sk))
+	sk = icmp_xmit_lock(net);
+	if (sk == NULL)
 		return;
 
 	/*
diff --git a/net/ipv4/netfilter/ipt_addrtype.c b/net/ipv4/netfilter/ipt_addrtype.c
index 49587a49722..462a22c9787 100644
--- a/net/ipv4/netfilter/ipt_addrtype.c
+++ b/net/ipv4/netfilter/ipt_addrtype.c
@@ -70,7 +70,7 @@ addrtype_mt_v1(const struct sk_buff *skb, const struct net_device *in,
 		       (info->flags & IPT_ADDRTYPE_INVERT_SOURCE);
 	if (ret && info->dest)
 		ret &= match_type(dev, iph->daddr, info->dest) ^
-		       (info->flags & IPT_ADDRTYPE_INVERT_DEST);
+		       !!(info->flags & IPT_ADDRTYPE_INVERT_DEST);
 	return ret;
 }
 
diff --git a/net/ipv4/netfilter/nf_nat_proto_common.c b/net/ipv4/netfilter/nf_nat_proto_common.c
index 91537f11273..6c4f11f5144 100644
--- a/net/ipv4/netfilter/nf_nat_proto_common.c
+++ b/net/ipv4/netfilter/nf_nat_proto_common.c
@@ -73,9 +73,13 @@ bool nf_nat_proto_unique_tuple(struct nf_conntrack_tuple *tuple,
 		range_size = ntohs(range->max.all) - min + 1;
 	}
 
-	off = *rover;
 	if (range->flags & IP_NAT_RANGE_PROTO_RANDOM)
-		off = net_random();
+		off = secure_ipv4_port_ephemeral(tuple->src.u3.ip, tuple->dst.u3.ip,
+						 maniptype == IP_NAT_MANIP_SRC
+						 ? tuple->dst.u.all
+						 : tuple->src.u.all);
+	else
+		off = *rover;
 
 	for (i = 0; i < range_size; i++, off++) {
 		*portptr = htons(min + off % range_size);
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 16fc6f454a3..cca921ea855 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2914,6 +2914,68 @@ static int ipv4_sysctl_rtcache_flush_strategy(ctl_table *table,
 	return 0;
 }
 
+static void rt_secret_reschedule(int old)
+{
+	struct net *net;
+	int new = ip_rt_secret_interval;
+	int diff = new - old;
+
+	if (!diff)
+		return;
+
+	rtnl_lock();
+	for_each_net(net) {
+		int deleted = del_timer_sync(&net->ipv4.rt_secret_timer);
+
+		if (!new)
+			continue;
+
+		if (deleted) {
+			long time = net->ipv4.rt_secret_timer.expires - jiffies;
+
+			if (time <= 0 || (time += diff) <= 0)
+				time = 0;
+
+			net->ipv4.rt_secret_timer.expires = time;
+		} else
+			net->ipv4.rt_secret_timer.expires = new;
+
+		net->ipv4.rt_secret_timer.expires += jiffies;
+		add_timer(&net->ipv4.rt_secret_timer);
+	}
+	rtnl_unlock();
+}
+
+static int ipv4_sysctl_rt_secret_interval(ctl_table *ctl, int write,
+					  struct file *filp,
+					  void __user *buffer, size_t *lenp,
+					  loff_t *ppos)
+{
+	int old = ip_rt_secret_interval;
+	int ret = proc_dointvec_jiffies(ctl, write, filp, buffer, lenp, ppos);
+
+	rt_secret_reschedule(old);
+
+	return ret;
+}
+
+static int ipv4_sysctl_rt_secret_interval_strategy(ctl_table *table,
+						   int __user *name,
+						   int nlen,
+						   void __user *oldval,
+						   size_t __user *oldlenp,
+						   void __user *newval,
+						   size_t newlen)
+{
+	int old = ip_rt_secret_interval;
+	int ret = sysctl_jiffies(table, name, nlen, oldval, oldlenp, newval,
+				 newlen);
+
+	rt_secret_reschedule(old);
+
+	return ret;
+}
+
 static ctl_table ipv4_route_table[] = {
 	{
 		.ctl_name	= NET_IPV4_ROUTE_GC_THRESH,
@@ -3048,8 +3110,8 @@ static ctl_table ipv4_route_table[] = {
 		.data		= &ip_rt_secret_interval,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
-		.strategy	= &sysctl_jiffies,
+		.proc_handler	= &ipv4_sysctl_rt_secret_interval,
+		.strategy	= &ipv4_sysctl_rt_secret_interval_strategy,
 	},
 	{ .ctl_name = 0 }
 };
@@ -3126,10 +3188,12 @@ static __net_init int rt_secret_timer_init(struct net *net)
 	net->ipv4.rt_secret_timer.data = (unsigned long)net;
 	init_timer_deferrable(&net->ipv4.rt_secret_timer);
 
-	net->ipv4.rt_secret_timer.expires =
-		jiffies + net_random() % ip_rt_secret_interval +
-		ip_rt_secret_interval;
-	add_timer(&net->ipv4.rt_secret_timer);
+	if (ip_rt_secret_interval) {
+		net->ipv4.rt_secret_timer.expires =
+			jiffies + net_random() % ip_rt_secret_interval +
+			ip_rt_secret_interval;
+		add_timer(&net->ipv4.rt_secret_timer);
+	}
 	return 0;
 }