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-rw-r--r--main/linux-grsec/0001-linux-2.6.28.5-ipgre-strict-binding.patch207
1 files changed, 207 insertions, 0 deletions
diff --git a/main/linux-grsec/0001-linux-2.6.28.5-ipgre-strict-binding.patch b/main/linux-grsec/0001-linux-2.6.28.5-ipgre-strict-binding.patch
new file mode 100644
index 000000000..fd0cfeb2a
--- /dev/null
+++ b/main/linux-grsec/0001-linux-2.6.28.5-ipgre-strict-binding.patch
@@ -0,0 +1,207 @@
+From: Timo Teras <timo.teras@iki.fi>
+Date: Tue, 20 Jan 2009 01:22:12 +0000 (-0800)
+Subject: gre: strict physical device binding
+X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Fdavem%2Fnet-next-2.6.git;a=commitdiff_plain;h=749c10f931923451a4c59b4435d182aa9ae27a4f;hp=57a574993d94671b495cdbe8aeb78b745abfe14f
+
+gre: strict physical device binding
+
+Check the device on receive path and allow otherwise identical devices
+as long as the physical device differs.
+
+This is useful for NBMA tunnels, where you want to use different gre IP
+for each public IP available via different physical devices.
+
+Signed-off-by: Timo Teras <timo.teras@iki.fi>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+
+diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
+index 0101521..4a43739 100644
+--- a/net/ipv4/ip_gre.c
++++ b/net/ipv4/ip_gre.c
+@@ -164,67 +164,113 @@ static DEFINE_RWLOCK(ipgre_lock);
+
+ /* Given src, dst and key, find appropriate for input tunnel. */
+
+-static struct ip_tunnel * ipgre_tunnel_lookup(struct net *net,
++static struct ip_tunnel * ipgre_tunnel_lookup(struct net_device *dev,
+ __be32 remote, __be32 local,
+ __be32 key, __be16 gre_proto)
+ {
++ struct net *net = dev_net(dev);
++ int link = dev->ifindex;
+ unsigned h0 = HASH(remote);
+ unsigned h1 = HASH(key);
+- struct ip_tunnel *t;
+- struct ip_tunnel *t2 = NULL;
++ struct ip_tunnel *t, *sel[4] = { NULL, NULL, NULL, NULL };
+ struct ipgre_net *ign = net_generic(net, ipgre_net_id);
+ int dev_type = (gre_proto == htons(ETH_P_TEB)) ?
+ ARPHRD_ETHER : ARPHRD_IPGRE;
++ int idx;
+
+ for (t = ign->tunnels_r_l[h0^h1]; t; t = t->next) {
+- if (local == t->parms.iph.saddr && remote == t->parms.iph.daddr) {
+- if (t->parms.i_key == key && t->dev->flags & IFF_UP) {
+- if (t->dev->type == dev_type)
+- return t;
+- if (t->dev->type == ARPHRD_IPGRE && !t2)
+- t2 = t;
+- }
+- }
++ if (local != t->parms.iph.saddr ||
++ remote != t->parms.iph.daddr ||
++ key != t->parms.i_key ||
++ !(t->dev->flags & IFF_UP))
++ continue;
++
++ if (t->dev->type != ARPHRD_IPGRE &&
++ t->dev->type != dev_type)
++ continue;
++
++ idx = 0;
++ if (t->parms.link != link)
++ idx |= 1;
++ if (t->dev->type != dev_type)
++ idx |= 2;
++ if (idx == 0)
++ return t;
++ if (sel[idx] == NULL)
++ sel[idx] = t;
+ }
+
+ for (t = ign->tunnels_r[h0^h1]; t; t = t->next) {
+- if (remote == t->parms.iph.daddr) {
+- if (t->parms.i_key == key && t->dev->flags & IFF_UP) {
+- if (t->dev->type == dev_type)
+- return t;
+- if (t->dev->type == ARPHRD_IPGRE && !t2)
+- t2 = t;
+- }
+- }
++ if (remote != t->parms.iph.daddr ||
++ key != t->parms.i_key ||
++ !(t->dev->flags & IFF_UP))
++ continue;
++
++ if (t->dev->type != ARPHRD_IPGRE &&
++ t->dev->type != dev_type)
++ continue;
++
++ idx = 0;
++ if (t->parms.link != link)
++ idx |= 1;
++ if (t->dev->type != dev_type)
++ idx |= 2;
++ if (idx == 0)
++ return t;
++ if (sel[idx] == NULL)
++ sel[idx] = t;
+ }
+
+ for (t = ign->tunnels_l[h1]; t; t = t->next) {
+- if (local == t->parms.iph.saddr ||
+- (local == t->parms.iph.daddr &&
+- ipv4_is_multicast(local))) {
+- if (t->parms.i_key == key && t->dev->flags & IFF_UP) {
+- if (t->dev->type == dev_type)
+- return t;
+- if (t->dev->type == ARPHRD_IPGRE && !t2)
+- t2 = t;
+- }
+- }
++ if ((local != t->parms.iph.saddr &&
++ (local != t->parms.iph.daddr ||
++ !ipv4_is_multicast(local))) ||
++ key != t->parms.i_key ||
++ !(t->dev->flags & IFF_UP))
++ continue;
++
++ if (t->dev->type != ARPHRD_IPGRE &&
++ t->dev->type != dev_type)
++ continue;
++
++ idx = 0;
++ if (t->parms.link != link)
++ idx |= 1;
++ if (t->dev->type != dev_type)
++ idx |= 2;
++ if (idx == 0)
++ return t;
++ if (sel[idx] == NULL)
++ sel[idx] = t;
+ }
+
+ for (t = ign->tunnels_wc[h1]; t; t = t->next) {
+- if (t->parms.i_key == key && t->dev->flags & IFF_UP) {
+- if (t->dev->type == dev_type)
+- return t;
+- if (t->dev->type == ARPHRD_IPGRE && !t2)
+- t2 = t;
+- }
++ if (t->parms.i_key != key ||
++ !(t->dev->flags & IFF_UP))
++ continue;
++
++ if (t->dev->type != ARPHRD_IPGRE &&
++ t->dev->type != dev_type)
++ continue;
++
++ idx = 0;
++ if (t->parms.link != link)
++ idx |= 1;
++ if (t->dev->type != dev_type)
++ idx |= 2;
++ if (idx == 0)
++ return t;
++ if (sel[idx] == NULL)
++ sel[idx] = t;
+ }
+
+- if (t2)
+- return t2;
++ for (idx = 1; idx < ARRAY_SIZE(sel); idx++)
++ if (sel[idx] != NULL)
++ return sel[idx];
+
+- if (ign->fb_tunnel_dev->flags&IFF_UP)
++ if (ign->fb_tunnel_dev->flags & IFF_UP)
+ return netdev_priv(ign->fb_tunnel_dev);
++
+ return NULL;
+ }
+
+@@ -284,6 +330,7 @@ static struct ip_tunnel *ipgre_tunnel_find(struct net *net,
+ __be32 remote = parms->iph.daddr;
+ __be32 local = parms->iph.saddr;
+ __be32 key = parms->i_key;
++ int link = parms->link;
+ struct ip_tunnel *t, **tp;
+ struct ipgre_net *ign = net_generic(net, ipgre_net_id);
+
+@@ -291,6 +338,7 @@ static struct ip_tunnel *ipgre_tunnel_find(struct net *net,
+ if (local == t->parms.iph.saddr &&
+ remote == t->parms.iph.daddr &&
+ key == t->parms.i_key &&
++ link == t->parms.link &&
+ type == t->dev->type)
+ break;
+
+@@ -421,7 +469,7 @@ static void ipgre_err(struct sk_buff *skb, u32 info)
+ }
+
+ read_lock(&ipgre_lock);
+- t = ipgre_tunnel_lookup(dev_net(skb->dev), iph->daddr, iph->saddr,
++ t = ipgre_tunnel_lookup(skb->dev, iph->daddr, iph->saddr,
+ flags & GRE_KEY ?
+ *(((__be32 *)p) + (grehlen / 4) - 1) : 0,
+ p[1]);
+@@ -518,7 +566,7 @@ static int ipgre_rcv(struct sk_buff *skb)
+ gre_proto = *(__be16 *)(h + 2);
+
+ read_lock(&ipgre_lock);
+- if ((tunnel = ipgre_tunnel_lookup(dev_net(skb->dev),
++ if ((tunnel = ipgre_tunnel_lookup(skb->dev,
+ iph->saddr, iph->daddr, key,
+ gre_proto))) {
+ struct net_device_stats *stats = &tunnel->dev->stats;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-13 23:36:26 +0000