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[NET]: Make packet reception network namespace safe

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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>
This commit is contained in:
Eric W. Biederman 2007-09-17 11:53:39 -07:00 • committed by David S. Miller
parent 6d34b1c27a
commit e730c15519
26 changed files with 113 additions and 0 deletions
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5
net/ipv6/ip6_input.c
View file

@ -61,6 +61,11 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
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;