[NET]: Make packet reception network namespace safe
This patch modifies every packet receive function
registered with dev_add_pack() to drop packets if they
are not from the initial network namespace.
This should ensure that the various network stacks do
not receive packets in a anything but the initial network
namespace until the code has been converted and is ready
for them.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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;