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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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7
drivers/net/wan/hdlc.c
View file

@ -36,6 +36,7 @@
#include <linux/rtnetlink.h>
#include <linux/notifier.h>
#include <linux/hdlc.h>
#include <net/net_namespace.h>
static const char* version = "HDLC support module revision 1.21";
@ -66,6 +67,12 @@ static int hdlc_rcv(struct sk_buff *skb, struct net_device *dev,
struct packet_type *p, struct net_device *orig_dev)
{
struct hdlc_device_desc *desc = dev_to_desc(dev);
if (dev->nd_net != &init_net) {
kfree_skb(skb);
return 0;
}
if (desc->netif_rx)
return desc->netif_rx(skb);