[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/drivers/block/aoe/aoenet.c b/drivers/block/aoe/aoenet.c
index f9ddfda..4dc0fb7 100644
--- a/drivers/block/aoe/aoenet.c
+++ b/drivers/block/aoe/aoenet.c
@@ -8,6 +8,7 @@
#include <linux/blkdev.h>
#include <linux/netdevice.h>
#include <linux/moduleparam.h>
+#include <net/net_namespace.h>
#include <asm/unaligned.h>
#include "aoe.h"
@@ -114,6 +115,9 @@
struct aoe_hdr *h;
u32 n;
+ if (ifp->nd_net != &init_net)
+ goto exit;
+
skb = skb_share_check(skb, GFP_ATOMIC);
if (skb == NULL)
return 0;
diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index f829e4a..94bd739 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -29,6 +29,7 @@
#include <linux/ethtool.h>
#include <linux/if_bonding.h>
#include <linux/pkt_sched.h>
+#include <net/net_namespace.h>
#include "bonding.h"
#include "bond_3ad.h"
@@ -2448,6 +2449,9 @@
struct slave *slave = NULL;
int ret = NET_RX_DROP;
+ if (dev->nd_net != &init_net)
+ goto out;
+
if (!(dev->flags & IFF_MASTER))
goto out;
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index 92c3b6f..419a9f8 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -345,6 +345,9 @@
struct arp_pkt *arp = (struct arp_pkt *)skb->data;
int res = NET_RX_DROP;
+ if (bond_dev->nd_net != &init_net)
+ goto out;
+
if (!(bond_dev->flags & IFF_MASTER))
goto out;
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 5de648f..e4e5fdc 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -2458,6 +2458,9 @@
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;
diff --git a/drivers/net/hamradio/bpqether.c b/drivers/net/hamradio/bpqether.c
index 1699d42..85fb8e7 100644
--- a/drivers/net/hamradio/bpqether.c
+++ b/drivers/net/hamradio/bpqether.c
@@ -173,6 +173,9 @@
struct ethhdr *eth;
struct bpqdev *bpq;
+ if (dev->nd_net != &init_net)
+ goto drop;
+
if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
return NET_RX_DROP;
diff --git a/drivers/net/pppoe.c b/drivers/net/pppoe.c
index 53fcee2..60c0e4e 100644
--- a/drivers/net/pppoe.c
+++ b/drivers/net/pppoe.c
@@ -389,6 +389,9 @@
if (!(skb = skb_share_check(skb, GFP_ATOMIC)))
goto out;
+ if (dev->nd_net != &init_net)
+ goto drop;
+
if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr)))
goto drop;
@@ -418,6 +421,9 @@
struct pppoe_hdr *ph;
struct pppox_sock *po;
+ if (dev->nd_net != &init_net)
+ goto abort;
+
if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr)))
goto abort;
diff --git a/drivers/net/wan/hdlc.c b/drivers/net/wan/hdlc.c
index 65ad2e2..3b57350 100644
--- a/drivers/net/wan/hdlc.c
+++ b/drivers/net/wan/hdlc.c
@@ -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 @@
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);
diff --git a/drivers/net/wan/lapbether.c b/drivers/net/wan/lapbether.c
index 6c302e9..ca8b3c3 100644
--- a/drivers/net/wan/lapbether.c
+++ b/drivers/net/wan/lapbether.c
@@ -91,6 +91,9 @@
int len, err;
struct lapbethdev *lapbeth;
+ if (dev->nd_net != &init_net)
+ goto drop;
+
if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
return NET_RX_DROP;
diff --git a/drivers/net/wan/syncppp.c b/drivers/net/wan/syncppp.c
index 67fc67c..5c71af6 100644
--- a/drivers/net/wan/syncppp.c
+++ b/drivers/net/wan/syncppp.c
@@ -51,6 +51,7 @@
#include <linux/spinlock.h>
#include <linux/rcupdate.h>
+#include <net/net_namespace.h>
#include <net/syncppp.h>
#include <asm/byteorder.h>
@@ -1445,6 +1446,11 @@
static int sppp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *p, struct net_device *orig_dev)
{
+ if (dev->nd_net != &init_net) {
+ kfree_skb(skb);
+ return 0;
+ }
+
if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
return NET_RX_DROP;
sppp_input(dev,skb);