1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/wan/syncppp.c b/drivers/net/wan/syncppp.c
index 67fc67cfd452..5c71af6ea3a5 100644
--- a/drivers/net/wan/syncppp.c
+++ b/drivers/net/wan/syncppp.c
@@ -51,6 +51,7 @@
 #include <linux/spinlock.h>
 #include <linux/rcupdate.h>
 
+#include <net/net_namespace.h>
 #include <net/syncppp.h>
 
 #include <asm/byteorder.h>
@@ -1445,6 +1446,11 @@ static void sppp_print_bytes (u_char *p, u16 len)
 
 static int sppp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *p, struct net_device *orig_dev)
 {
+        if (dev->nd_net != &init_net) {
+                kfree_skb(skb);
+                return 0;
+        }
+
         if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
                 return NET_RX_DROP;
         sppp_input(dev,skb);