diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 328759c..6644e8f 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -122,6 +122,11 @@
 	unsigned short vlan_TCI;
 	__be16 proto;
 
+	if (dev->nd_net != &init_net) {
+		kfree_skb(skb);
+		return -1;
+	}
+
 	if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
 		return -1;
 
diff --git a/net/appletalk/aarp.c b/net/appletalk/aarp.c
index 80b5414..9267f48 100644
--- a/net/appletalk/aarp.c
+++ b/net/appletalk/aarp.c
@@ -713,6 +713,9 @@
 	struct atalk_addr sa, *ma, da;
 	struct atalk_iface *ifa;
 
+	if (dev->nd_net != &init_net)
+		goto out0;
+
 	/* We only do Ethernet SNAP AARP. */
 	if (dev->type != ARPHRD_ETHER)
 		goto out0;
diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c
index fd1d52f..c1f1367 100644
--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -1403,6 +1403,9 @@
 	int origlen;
 	__u16 len_hops;
 
+	if (dev->nd_net != &init_net)
+		goto freeit;
+
 	/* Don't mangle buffer if shared */
 	if (!(skb = skb_share_check(skb, GFP_ATOMIC)))
 		goto out;
@@ -1488,6 +1491,9 @@
 static int ltalk_rcv(struct sk_buff *skb, struct net_device *dev,
 		     struct packet_type *pt, struct net_device *orig_dev)
 {
+	if (dev->nd_net != &init_net)
+		goto freeit;
+
 	/* Expand any short form frames */
 	if (skb_mac_header(skb)[2] == 1) {
 		struct ddpehdr *ddp;
diff --git a/net/ax25/ax25_in.c b/net/ax25/ax25_in.c
index 0ddaff0..3b7d172 100644
--- a/net/ax25/ax25_in.c
+++ b/net/ax25/ax25_in.c
@@ -451,6 +451,11 @@
 	skb->sk = NULL;		/* Initially we don't know who it's for */
 	skb->destructor = NULL;	/* Who initializes this, dammit?! */
 
+	if (dev->nd_net != &init_net) {
+		kfree_skb(skb);
+		return 0;
+	}
+
 	if ((*skb->data & 0x0F) != 0) {
 		kfree_skb(skb);	/* Not a KISS data frame */
 		return 0;
diff --git a/net/bridge/br_stp_bpdu.c b/net/bridge/br_stp_bpdu.c
index 14f0c88..0edbd2a 100644
--- a/net/bridge/br_stp_bpdu.c
+++ b/net/bridge/br_stp_bpdu.c
@@ -17,6 +17,7 @@
 #include <linux/netfilter_bridge.h>
 #include <linux/etherdevice.h>
 #include <linux/llc.h>
+#include <net/net_namespace.h>
 #include <net/llc.h>
 #include <net/llc_pdu.h>
 #include <asm/unaligned.h>
@@ -141,6 +142,9 @@
 	struct net_bridge *br;
 	const unsigned char *buf;
 
+	if (dev->nd_net != &init_net)
+		goto err;
+
 	if (!p)
 		goto err;
 
diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
index 4cfea95..580e786 100644
--- a/net/decnet/dn_route.c
+++ b/net/decnet/dn_route.c
@@ -584,6 +584,9 @@
 	struct dn_dev *dn = (struct dn_dev *)dev->dn_ptr;
 	unsigned char padlen = 0;
 
+	if (dev->nd_net != &init_net)
+		goto dump_it;
+
 	if (dn == NULL)
 		goto dump_it;
 
diff --git a/net/econet/af_econet.c b/net/econet/af_econet.c
index a2429db..7de3006 100644
--- a/net/econet/af_econet.c
+++ b/net/econet/af_econet.c
@@ -1065,6 +1065,9 @@
 	struct sock *sk;
 	struct ec_device *edev = dev->ec_ptr;
 
+	if (dev->nd_net != &init_net)
+		goto drop;
+
 	if (skb->pkt_type == PACKET_OTHERHOST)
 		goto drop;
 
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 78dd344..bde1297 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -932,6 +932,9 @@
 {
 	struct arphdr *arp;
 
+	if (dev->nd_net != &init_net)
+		goto freeskb;
+
 	/* ARP header, plus 2 device addresses, plus 2 IP addresses.  */
 	if (!pskb_may_pull(skb, (sizeof(struct arphdr) +
 				 (2 * dev->addr_len) +
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 9706939..41d8964 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -382,6 +382,9 @@
 	struct iphdr *iph;
 	u32 len;
 
+	if (dev->nd_net != &init_net)
+		goto drop;
+
 	/* When the interface is in promisc. mode, drop all the crap
 	 * that it receives, do not try to analyse it.
 	 */
diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c
index 5ae4849..08ff623 100644
--- a/net/ipv4/ipconfig.c
+++ b/net/ipv4/ipconfig.c
@@ -426,6 +426,9 @@
 	unsigned char *sha, *tha;		/* s for "source", t for "target" */
 	struct ic_device *d;
 
+	if (dev->nd_net != &init_net)
+		goto drop;
+
 	if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
 		return NET_RX_DROP;
 
@@ -835,6 +838,9 @@
 	struct ic_device *d;
 	int len, ext_len;
 
+	if (dev->nd_net != &init_net)
+		goto drop;
+
 	/* Perform verifications before taking the lock.  */
 	if (skb->pkt_type == PACKET_OTHERHOST)
 		goto drop;
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index 30a5cb1..7d18cac 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -61,6 +61,11 @@
 	u32 		pkt_len;
 	struct inet6_dev *idev;
 
+	if (dev->nd_net != &init_net) {
+		kfree_skb(skb);
+		return 0;
+	}
+
 	if (skb->pkt_type == PACKET_OTHERHOST) {
 		kfree_skb(skb);
 		return 0;
diff --git a/net/ipx/af_ipx.c b/net/ipx/af_ipx.c
index ee28bab..f7b4d38 100644
--- a/net/ipx/af_ipx.c
+++ b/net/ipx/af_ipx.c
@@ -1647,6 +1647,9 @@
 	u16 ipx_pktsize;
 	int rc = 0;
 
+	if (dev->nd_net != &init_net)
+		goto drop;
+
 	/* Not ours */
 	if (skb->pkt_type == PACKET_OTHERHOST)
 		goto drop;
diff --git a/net/irda/irlap_frame.c b/net/irda/irlap_frame.c
index 25a3444..77ac27e 100644
--- a/net/irda/irlap_frame.c
+++ b/net/irda/irlap_frame.c
@@ -1326,6 +1326,9 @@
 	int command;
 	__u8 control;
 
+	if (dev->nd_net != &init_net)
+		goto out;
+
 	/* FIXME: should we get our own field? */
 	self = (struct irlap_cb *) dev->atalk_ptr;
 
diff --git a/net/llc/llc_input.c b/net/llc/llc_input.c
index 099ed8f..c40c9b2 100644
--- a/net/llc/llc_input.c
+++ b/net/llc/llc_input.c
@@ -12,6 +12,7 @@
  * See the GNU General Public License for more details.
  */
 #include <linux/netdevice.h>
+#include <net/net_namespace.h>
 #include <net/llc.h>
 #include <net/llc_pdu.h>
 #include <net/llc_sap.h>
@@ -145,6 +146,9 @@
 	int (*rcv)(struct sk_buff *, struct net_device *,
 		   struct packet_type *, struct net_device *);
 
+	if (dev->nd_net != &init_net)
+		goto drop;
+
 	/*
 	 * When the interface is in promisc. mode, drop all the crap that it
 	 * receives, do not try to analyse it.
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 766b5fa..cae1ee4 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -252,6 +252,9 @@
 	struct sock *sk;
 	struct sockaddr_pkt *spkt;
 
+	if (dev->nd_net != &init_net)
+		goto out;
+
 	/*
 	 *	When we registered the protocol we saved the socket in the data
 	 *	field for just this event.
@@ -452,6 +455,9 @@
 	int skb_len = skb->len;
 	unsigned int snaplen, res;
 
+	if (dev->nd_net != &init_net)
+		goto drop;
+
 	if (skb->pkt_type == PACKET_LOOPBACK)
 		goto drop;
 
@@ -568,6 +574,9 @@
 	struct sk_buff *copy_skb = NULL;
 	struct timeval tv;
 
+	if (dev->nd_net != &init_net)
+		goto drop;
+
 	if (skb->pkt_type == PACKET_LOOPBACK)
 		goto drop;
 
diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c
index 711ca4b..d2ed237 100644
--- a/net/tipc/eth_media.c
+++ b/net/tipc/eth_media.c
@@ -38,6 +38,7 @@
 #include <net/tipc/tipc_bearer.h>
 #include <net/tipc/tipc_msg.h>
 #include <linux/netdevice.h>
+#include <net/net_namespace.h>
 
 #define MAX_ETH_BEARERS		2
 #define ETH_LINK_PRIORITY	TIPC_DEF_LINK_PRI
@@ -100,6 +101,11 @@
 	struct eth_bearer *eb_ptr = (struct eth_bearer *)pt->af_packet_priv;
 	u32 size;
 
+	if (dev->nd_net != &init_net) {
+		kfree_skb(buf);
+		return 0;
+	}
+
 	if (likely(eb_ptr->bearer)) {
 		if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
 			size = msg_size((struct tipc_msg *)buf->data);
diff --git a/net/x25/x25_dev.c b/net/x25/x25_dev.c
index 848a6b6..f0679d2 100644
--- a/net/x25/x25_dev.c
+++ b/net/x25/x25_dev.c
@@ -95,6 +95,9 @@
 	struct sk_buff *nskb;
 	struct x25_neigh *nb;
 
+	if (dev->nd_net != &init_net)
+		goto drop;
+
 	nskb = skb_copy(skb, GFP_ATOMIC);
 	if (!nskb)
 		goto drop;