[NET]: Modify all rtnetlink methods to only work in the initial namespace (v2)

Before I can enable rtnetlink to work in all network namespaces I need
to be certain that something won't break.  So this patch deliberately
disables all of the rtnletlink methods in everything except the
initial network namespace.  After the methods have been audited this
extra check can be disabled.

Changes from v1:
- added IPv6 addrlabel protection

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

18 files changed, 218 insertions, 1 deletions

diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 53ab8e0cb518..a4ffa2b63cd5 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -13,6 +13,7 @@
 #include <linux/kernel.h>
 #include <net/rtnetlink.h>
 #include <net/net_namespace.h>
+#include <net/sock.h>
 #include "br_private.h"
 
 static inline size_t br_nlmsg_size(void)
@@ -107,9 +108,13 @@ errout:
  */
 static int br_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         struct net_device *dev;
         int idx;
 
+        if (net != &init_net)
+                return 0;
+
         idx = 0;
         for_each_netdev(&init_net, dev) {
                 /* not a bridge port */
@@ -135,12 +140,16 @@ skip:
  */
 static int br_rtm_setlink(struct sk_buff *skb,  struct nlmsghdr *nlh, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct ifinfomsg *ifm;
         struct nlattr *protinfo;
         struct net_device *dev;
         struct net_bridge_port *p;
         u8 new_state;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         if (nlmsg_len(nlh) < sizeof(*ifm))
                 return -EINVAL;
 
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index 848132b6cb73..3b20b6f0982e 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -228,6 +228,9 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
         struct nlattr *tb[FRA_MAX+1];
         int err = -EINVAL, unresolved = 0;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh)))
                 goto errout;
 
@@ -358,12 +361,16 @@ errout:
 
 static int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct fib_rule_hdr *frh = nlmsg_data(nlh);
         struct fib_rules_ops *ops = NULL;
         struct fib_rule *rule, *tmp;
         struct nlattr *tb[FRA_MAX+1];
         int err = -EINVAL;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh)))
                 goto errout;
 
@@ -539,9 +546,13 @@ skip:
 
 static int fib_nl_dumprule(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         struct fib_rules_ops *ops;
         int idx = 0, family;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         family = rtnl_msg_family(cb->nlh);
         if (family != AF_UNSPEC) {
                 /* Protocol specific dump request */
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 175bbc0a974e..29f0a4d2008f 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -1449,6 +1449,9 @@ static int neigh_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
         struct net_device *dev = NULL;
         int err = -EINVAL;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         if (nlmsg_len(nlh) < sizeof(*ndm))
                 goto out;
 
@@ -1515,6 +1518,9 @@ static int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
         struct net_device *dev = NULL;
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
         if (err < 0)
                 goto out;
@@ -1789,11 +1795,15 @@ static const struct nla_policy nl_ntbl_parm_policy[NDTPA_MAX+1] = {
 
 static int neightbl_set(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct neigh_table *tbl;
         struct ndtmsg *ndtmsg;
         struct nlattr *tb[NDTA_MAX+1];
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         err = nlmsg_parse(nlh, sizeof(*ndtmsg), tb, NDTA_MAX,
                           nl_neightbl_policy);
         if (err < 0)
@@ -1913,11 +1923,15 @@ errout:
 
 static int neightbl_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         int family, tidx, nidx = 0;
         int tbl_skip = cb->args[0];
         int neigh_skip = cb->args[1];
         struct neigh_table *tbl;
 
+        if (net != &init_net)
+                return 0;
+
         family = ((struct rtgenmsg *) nlmsg_data(cb->nlh))->rtgen_family;
 
         read_lock(&neigh_tbl_lock);
@@ -2042,9 +2056,13 @@ out:
 
 static int neigh_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         struct neigh_table *tbl;
         int t, family, s_t;
 
+        if (net != &init_net)
+                return 0;
+
         read_lock(&neigh_tbl_lock);
         family = ((struct rtgenmsg *) nlmsg_data(cb->nlh))->rtgen_family;
         s_t = cb->args[0];
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index fed95a323b28..4edc3dac4ccd 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -703,6 +703,9 @@ static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
         int s_idx = cb->args[0];
         struct net_device *dev;
 
+        if (net != &init_net)
+                return 0;
+
         idx = 0;
         for_each_netdev(net, dev) {
                 if (idx < s_idx)
@@ -905,6 +908,9 @@ static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
         struct nlattr *tb[IFLA_MAX+1];
         char ifname[IFNAMSIZ];
 
+        if (net != &init_net)
+                return -EINVAL;
+
         err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
         if (err < 0)
                 goto errout;
@@ -953,6 +959,9 @@ static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
         struct nlattr *tb[IFLA_MAX+1];
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
         if (err < 0)
                 return err;
@@ -1034,6 +1043,9 @@ static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
         struct nlattr *linkinfo[IFLA_INFO_MAX+1];
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
 #ifdef CONFIG_KMOD
 replay:
 #endif
@@ -1160,6 +1172,9 @@ static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
         struct sk_buff *nskb;
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy);
         if (err < 0)
                 return err;
@@ -1195,9 +1210,13 @@ errout:
 
 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         int idx;
         int s_idx = cb->family;
 
+        if (net != &init_net)
+                return 0;
+
         if (s_idx == 0)
                 s_idx = 1;
         for (idx=1; idx<NPROTO; idx++) {
diff --git a/net/decnet/dn_dev.c b/net/decnet/dn_dev.c
index 3bc82dc83b38..94256845a057 100644
--- a/net/decnet/dn_dev.c
+++ b/net/decnet/dn_dev.c
@@ -647,11 +647,15 @@ static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
 
 static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct nlattr *tb[IFA_MAX+1];
         struct dn_dev *dn_db;
         struct ifaddrmsg *ifm;
         struct dn_ifaddr *ifa, **ifap;
-        int err;
+        int err = -EINVAL;
+
+        if (net != &init_net)
+                goto errout;
 
         err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
         if (err < 0)
@@ -681,6 +685,7 @@ errout:
 
 static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct nlattr *tb[IFA_MAX+1];
         struct net_device *dev;
         struct dn_dev *dn_db;
@@ -688,6 +693,9 @@ static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
         struct dn_ifaddr *ifa;
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
         if (err < 0)
                 return err;
@@ -793,11 +801,15 @@ errout:
 
 static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         int idx, dn_idx = 0, skip_ndevs, skip_naddr;
         struct net_device *dev;
         struct dn_dev *dn_db;
         struct dn_ifaddr *ifa;
 
+        if (net != &init_net)
+                return 0;
+
         skip_ndevs = cb->args[0];
         skip_naddr = cb->args[1];
 
diff --git a/net/decnet/dn_fib.c b/net/decnet/dn_fib.c
index 3760a20d10d0..5413e1b75b5d 100644
--- a/net/decnet/dn_fib.c
+++ b/net/decnet/dn_fib.c
@@ -506,10 +506,14 @@ static int dn_fib_check_attr(struct rtmsg *r, struct rtattr **rta)
 
 static int dn_fib_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct dn_fib_table *tb;
         struct rtattr **rta = arg;
         struct rtmsg *r = NLMSG_DATA(nlh);
 
+        if (net != &init_net)
+                return -EINVAL;
+
         if (dn_fib_check_attr(r, rta))
                 return -EINVAL;
 
@@ -522,10 +526,14 @@ static int dn_fib_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *
 
 static int dn_fib_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct dn_fib_table *tb;
         struct rtattr **rta = arg;
         struct rtmsg *r = NLMSG_DATA(nlh);
 
+        if (net != &init_net)
+                return -EINVAL;
+
         if (dn_fib_check_attr(r, rta))
                 return -EINVAL;
 
diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
index 2a5bb0714c7e..28aeba15cf12 100644
--- a/net/decnet/dn_route.c
+++ b/net/decnet/dn_route.c
@@ -1511,6 +1511,7 @@ rtattr_failure:
  */
 static int dn_cache_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh, void *arg)
 {
+        struct net *net = in_skb->sk->sk_net;
         struct rtattr **rta = arg;
         struct rtmsg *rtm = NLMSG_DATA(nlh);
         struct dn_route *rt = NULL;
@@ -1519,6 +1520,9 @@ static int dn_cache_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh, void
         struct sk_buff *skb;
         struct flowi fl;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         memset(&fl, 0, sizeof(fl));
         fl.proto = DNPROTO_NSP;
 
@@ -1596,10 +1600,14 @@ out_free:
  */
 int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         struct dn_route *rt;
         int h, s_h;
         int idx, s_idx;
 
+        if (net != &init_net)
+                return 0;
+
         if (NLMSG_PAYLOAD(cb->nlh, 0) < sizeof(struct rtmsg))
                 return -EINVAL;
         if (!(((struct rtmsg *)NLMSG_DATA(cb->nlh))->rtm_flags&RTM_F_CLONED))
diff --git a/net/decnet/dn_table.c b/net/decnet/dn_table.c
index fda0772fa215..a3bdb8dd1fb2 100644
--- a/net/decnet/dn_table.c
+++ b/net/decnet/dn_table.c
@@ -463,12 +463,16 @@ static int dn_fib_table_dump(struct dn_fib_table *tb, struct sk_buff *skb,
 
 int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         unsigned int h, s_h;
         unsigned int e = 0, s_e;
         struct dn_fib_table *tb;
         struct hlist_node *node;
         int dumped = 0;
 
+        if (net != &init_net)
+                return 0;
+
         if (NLMSG_PAYLOAD(cb->nlh, 0) >= sizeof(struct rtmsg) &&
                 ((struct rtmsg *)NLMSG_DATA(cb->nlh))->rtm_flags&RTM_F_CLONED)
                         return dn_cache_dump(skb, cb);
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index b42f74617bac..c0eb26a0d0bc 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -441,6 +441,7 @@ struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix,
 
 static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct nlattr *tb[IFA_MAX+1];
         struct in_device *in_dev;
         struct ifaddrmsg *ifm;
@@ -449,6 +450,9 @@ static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg
 
         ASSERT_RTNL();
 
+        if (net != &init_net)
+                return -EINVAL;
+
         err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy);
         if (err < 0)
                 goto errout;
@@ -560,10 +564,14 @@ errout:
 
 static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct in_ifaddr *ifa;
 
         ASSERT_RTNL();
 
+        if (net != &init_net)
+                return -EINVAL;
+
         ifa = rtm_to_ifaddr(nlh);
         if (IS_ERR(ifa))
                 return PTR_ERR(ifa);
@@ -1174,12 +1182,16 @@ nla_put_failure:
 
 static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         int idx, ip_idx;
         struct net_device *dev;
         struct in_device *in_dev;
         struct in_ifaddr *ifa;
         int s_ip_idx, s_idx = cb->args[0];
 
+        if (net != &init_net)
+                return 0;
+
         s_ip_idx = ip_idx = cb->args[1];
         idx = 0;
         for_each_netdev(&init_net, dev) {
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 97abf934d185..e02aba5fa136 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -538,10 +538,14 @@ errout:
 
 static int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct fib_config cfg;
         struct fib_table *tb;
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         err = rtm_to_fib_config(skb, nlh, &cfg);
         if (err < 0)
                 goto errout;
@@ -559,10 +563,14 @@ errout:
 
 static int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct fib_config cfg;
         struct fib_table *tb;
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         err = rtm_to_fib_config(skb, nlh, &cfg);
         if (err < 0)
                 goto errout;
@@ -580,12 +588,16 @@ errout:
 
 static int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         unsigned int h, s_h;
         unsigned int e = 0, s_e;
         struct fib_table *tb;
         struct hlist_node *node;
         int dumped = 0;
 
+        if (net != &init_net)
+                return 0;
+
         if (nlmsg_len(cb->nlh) >= sizeof(struct rtmsg) &&
             ((struct rtmsg *) nlmsg_data(cb->nlh))->rtm_flags & RTM_F_CLONED)
                 return ip_rt_dump(skb, cb);
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index a21021bf1409..1d2839571d2f 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2527,6 +2527,7 @@ nla_put_failure:
 
 static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
 {
+        struct net *net = in_skb->sk->sk_net;
         struct rtmsg *rtm;
         struct nlattr *tb[RTA_MAX+1];
         struct rtable *rt = NULL;
@@ -2536,6 +2537,9 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
         int err;
         struct sk_buff *skb;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv4_policy);
         if (err < 0)
                 goto errout;
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index a70cecf8fc8d..26de8ee5095b 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2971,11 +2971,15 @@ static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
 static int
 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct ifaddrmsg *ifm;
         struct nlattr *tb[IFA_MAX+1];
         struct in6_addr *pfx;
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
         if (err < 0)
                 return err;
@@ -3028,6 +3032,7 @@ static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
 static int
 inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct ifaddrmsg *ifm;
         struct nlattr *tb[IFA_MAX+1];
         struct in6_addr *pfx;
@@ -3037,6 +3042,9 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
         u8 ifa_flags;
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
         if (err < 0)
                 return err;
@@ -3310,26 +3318,42 @@ done:
 
 static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         enum addr_type_t type = UNICAST_ADDR;
+
+        if (net != &init_net)
+                return 0;
+
         return inet6_dump_addr(skb, cb, type);
 }
 
 static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         enum addr_type_t type = MULTICAST_ADDR;
+
+        if (net != &init_net)
+                return 0;
+
         return inet6_dump_addr(skb, cb, type);
 }
 
 
 static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         enum addr_type_t type = ANYCAST_ADDR;
+
+        if (net != &init_net)
+                return 0;
+
         return inet6_dump_addr(skb, cb, type);
 }
 
 static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
                              void *arg)
 {
+        struct net *net = in_skb->sk->sk_net;
         struct ifaddrmsg *ifm;
         struct nlattr *tb[IFA_MAX+1];
         struct in6_addr *addr = NULL;
@@ -3338,6 +3362,9 @@ static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr* nlh,
         struct sk_buff *skb;
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
         if (err < 0)
                 goto errout;
@@ -3555,11 +3582,15 @@ nla_put_failure:
 
 static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         int idx, err;
         int s_idx = cb->args[0];
         struct net_device *dev;
         struct inet6_dev *idev;
 
+        if (net != &init_net)
+                return 0;
+
         read_lock(&dev_base_lock);
         idx = 0;
         for_each_netdev(&init_net, dev) {
diff --git a/net/ipv6/addrlabel.c b/net/ipv6/addrlabel.c
index 204d4d66834c..b9b5d5707142 100644
--- a/net/ipv6/addrlabel.c
+++ b/net/ipv6/addrlabel.c
@@ -361,12 +361,16 @@ static const struct nla_policy ifal_policy[IFAL_MAX+1] = {
 static int ip6addrlbl_newdel(struct sk_buff *skb, struct nlmsghdr *nlh,
                              void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct ifaddrlblmsg *ifal;
         struct nlattr *tb[IFAL_MAX+1];
         struct in6_addr *pfx;
         u32 label;
         int err = 0;
 
+        if (net != &init_net)
+                return 0;
+
         err = nlmsg_parse(nlh, sizeof(*ifal), tb, IFAL_MAX, ifal_policy);
         if (err < 0)
                 return err;
@@ -445,11 +449,15 @@ static int ip6addrlbl_fill(struct sk_buff *skb,
 
 static int ip6addrlbl_dump(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         struct ip6addrlbl_entry *p;
         struct hlist_node *pos;
         int idx = 0, s_idx = cb->args[0];
         int err;
 
+        if (net != &init_net)
+                return 0;
+
         rcu_read_lock();
         hlist_for_each_entry_rcu(p, pos, &ip6addrlbl_table.head, list) {
                 if (idx >= s_idx) {
@@ -479,6 +487,7 @@ static inline int ip6addrlbl_msgsize(void)
 static int ip6addrlbl_get(struct sk_buff *in_skb, struct nlmsghdr* nlh,
                           void *arg)
 {
+        struct net *net = in_skb->sk->sk_net;
         struct ifaddrlblmsg *ifal;
         struct nlattr *tb[IFAL_MAX+1];
         struct in6_addr *addr;
@@ -487,6 +496,9 @@ static int ip6addrlbl_get(struct sk_buff *in_skb, struct nlmsghdr* nlh,
         struct ip6addrlbl_entry *p;
         struct sk_buff *skb;
 
+        if (net != &init_net)
+                return 0;
+
         err = nlmsg_parse(nlh, sizeof(*ifal), tb, IFAL_MAX, ifal_policy);
         if (err < 0)
                 return err;
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 946cf389ab95..31b60a02512a 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -361,6 +361,7 @@ end:
 
 static int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         unsigned int h, s_h;
         unsigned int e = 0, s_e;
         struct rt6_rtnl_dump_arg arg;
@@ -369,6 +370,9 @@ static int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
         struct hlist_node *node;
         int res = 0;
 
+        if (net != &init_net)
+                return 0;
+
         s_h = cb->args[0];
         s_e = cb->args[1];
 
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 4ef2cfaa3467..5e1c5796761b 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2003,9 +2003,13 @@ errout:
 
 static int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct fib6_config cfg;
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         err = rtm_to_fib6_config(skb, nlh, &cfg);
         if (err < 0)
                 return err;
@@ -2015,9 +2019,13 @@ static int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *a
 
 static int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct fib6_config cfg;
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         err = rtm_to_fib6_config(skb, nlh, &cfg);
         if (err < 0)
                 return err;
@@ -2152,6 +2160,7 @@ int rt6_dump_route(struct rt6_info *rt, void *p_arg)
 
 static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
 {
+        struct net *net = in_skb->sk->sk_net;
         struct nlattr *tb[RTA_MAX+1];
         struct rt6_info *rt;
         struct sk_buff *skb;
@@ -2159,6 +2168,9 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
         struct flowi fl;
         int err, iif = 0;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy);
         if (err < 0)
                 goto errout;
diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 72cdb0fade20..852829139c67 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -18,6 +18,8 @@
 #include <linux/skbuff.h>
 #include <linux/init.h>
 #include <linux/kmod.h>
+#include <net/net_namespace.h>
+#include <net/sock.h>
 #include <net/sch_generic.h>
 #include <net/act_api.h>
 #include <net/netlink.h>
@@ -924,10 +926,14 @@ done:
 
 static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct rtattr **tca = arg;
         u32 pid = skb ? NETLINK_CB(skb).pid : 0;
         int ret = 0, ovr = 0;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         if (tca[TCA_ACT_TAB-1] == NULL) {
                 printk("tc_ctl_action: received NO action attribs\n");
                 return -EINVAL;
@@ -997,6 +1003,7 @@ find_dump_kind(struct nlmsghdr *n)
 static int
 tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         struct nlmsghdr *nlh;
         unsigned char *b = skb_tail_pointer(skb);
         struct rtattr *x;
@@ -1006,6 +1013,9 @@ tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
         struct tcamsg *t = (struct tcamsg *) NLMSG_DATA(cb->nlh);
         struct rtattr *kind = find_dump_kind(cb->nlh);
 
+        if (net != &init_net)
+                return 0;
+
         if (kind == NULL) {
                 printk("tc_dump_action: action bad kind\n");
                 return 0;
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index bb98045d5508..fdab6a530bba 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -23,6 +23,8 @@
 #include <linux/init.h>
 #include <linux/kmod.h>
 #include <linux/netlink.h>
+#include <net/net_namespace.h>
+#include <net/sock.h>
 #include <net/netlink.h>
 #include <net/pkt_sched.h>
 #include <net/pkt_cls.h>
@@ -119,6 +121,7 @@ static __inline__ u32 tcf_auto_prio(struct tcf_proto *tp)
 
 static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct rtattr **tca;
         struct tcmsg *t;
         u32 protocol;
@@ -135,6 +138,9 @@ static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
         unsigned long fh;
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
 replay:
         tca = arg;
         t = NLMSG_DATA(n);
@@ -375,6 +381,7 @@ static int tcf_node_dump(struct tcf_proto *tp, unsigned long n, struct tcf_walke
 
 static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         int t;
         int s_t;
         struct net_device *dev;
@@ -385,6 +392,9 @@ static int tc_dump_tfilter(struct sk_buff *skb, struct netlink_callback *cb)
         const struct Qdisc_class_ops *cops;
         struct tcf_dump_args arg;
 
+        if (net != &init_net)
+                return 0;
+
         if (cb->nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*tcm)))
                 return skb->len;
         if ((dev = dev_get_by_index(&init_net, tcm->tcm_ifindex)) == NULL)
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 259321be1ad8..f30e3f7ad885 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -29,6 +29,7 @@
 #include <linux/hrtimer.h>
 
 #include <net/net_namespace.h>
+#include <net/sock.h>
 #include <net/netlink.h>
 #include <net/pkt_sched.h>
 
@@ -599,6 +600,7 @@ check_loop_fn(struct Qdisc *q, unsigned long cl, struct qdisc_walker *w)
 
 static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct tcmsg *tcm = NLMSG_DATA(n);
         struct rtattr **tca = arg;
         struct net_device *dev;
@@ -607,6 +609,9 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
         struct Qdisc *p = NULL;
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         if ((dev = __dev_get_by_index(&init_net, tcm->tcm_ifindex)) == NULL)
                 return -ENODEV;
 
@@ -660,6 +665,7 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 
 static int tc_modify_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct tcmsg *tcm;
         struct rtattr **tca;
         struct net_device *dev;
@@ -667,6 +673,9 @@ static int tc_modify_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
         struct Qdisc *q, *p;
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
 replay:
         /* Reinit, just in case something touches this. */
         tcm = NLMSG_DATA(n);
@@ -872,11 +881,15 @@ err_out:
 
 static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         int idx, q_idx;
         int s_idx, s_q_idx;
         struct net_device *dev;
         struct Qdisc *q;
 
+        if (net != &init_net)
+                return 0;
+
         s_idx = cb->args[0];
         s_q_idx = q_idx = cb->args[1];
         read_lock(&dev_base_lock);
@@ -920,6 +933,7 @@ done:
 
 static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 {
+        struct net *net = skb->sk->sk_net;
         struct tcmsg *tcm = NLMSG_DATA(n);
         struct rtattr **tca = arg;
         struct net_device *dev;
@@ -932,6 +946,9 @@ static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
         u32 qid = TC_H_MAJ(clid);
         int err;
 
+        if (net != &init_net)
+                return -EINVAL;
+
         if ((dev = __dev_get_by_index(&init_net, tcm->tcm_ifindex)) == NULL)
                 return -ENODEV;
 
@@ -1106,6 +1123,7 @@ static int qdisc_class_dump(struct Qdisc *q, unsigned long cl, struct qdisc_walk
 
 static int tc_dump_tclass(struct sk_buff *skb, struct netlink_callback *cb)
 {
+        struct net *net = skb->sk->sk_net;
         int t;
         int s_t;
         struct net_device *dev;
@@ -1113,6 +1131,9 @@ static int tc_dump_tclass(struct sk_buff *skb, struct netlink_callback *cb)
         struct tcmsg *tcm = (struct tcmsg*)NLMSG_DATA(cb->nlh);
         struct qdisc_dump_args arg;
 
+        if (net != &init_net)
+                return 0;
+
         if (cb->nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*tcm)))
                 return 0;
         if ((dev = dev_get_by_index(&init_net, tcm->tcm_ifindex)) == NULL)