From e730c15519d09ea528b4d2f1103681fa5937c0e6 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Mon, 17 Sep 2007 11:53:39 -0700 Subject: [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 Signed-off-by: David S. Miller --- net/ipv4/arp.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'net/ipv4/arp.c') diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index 78dd3443016..bde129708e2 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -932,6 +932,9 @@ static int arp_rcv(struct sk_buff *skb, struct net_device *dev, { 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) + -- cgit v1.2.3