[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>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 5de648f90a45..e4e5fdc0430b 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -2458,6 +2458,9 @@ static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct pack
         unsigned char *arp_ptr;
         u32 sip, tip;
 
+        if (dev->nd_net != &init_net)
+                goto out;
+
         if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
                 goto out;