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authorEric W. Biederman <ebiederm@xmission.com>2007-09-17 11:53:39 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 16:49:08 -0700
commite730c15519d09ea528b4d2f1103681fa5937c0e6 (patch)
treec117294523f4d004fb1d740610b6403e5744cdfc /drivers/net
parent6d34b1c27a72d5d1c73c567b2f6b1fde316e0eae (diff)
[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>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/bonding/bond_3ad.c4
-rw-r--r--drivers/net/bonding/bond_alb.c3
-rw-r--r--drivers/net/bonding/bond_main.c3
-rw-r--r--drivers/net/hamradio/bpqether.c3
-rw-r--r--drivers/net/pppoe.c6
-rw-r--r--drivers/net/wan/hdlc.c7
-rw-r--r--drivers/net/wan/lapbether.c3
-rw-r--r--drivers/net/wan/syncppp.c6
8 files changed, 35 insertions, 0 deletions
diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index f829e4ad8b4..94bd7394145 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 @@ int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct pac
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 92c3b6f6a8e..419a9f8fdd5 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -345,6 +345,9 @@ static int rlb_arp_recv(struct sk_buff *skb, struct net_device *bond_dev, struct
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 5de648f90a4..e4e5fdc0430 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;
diff --git a/drivers/net/hamradio/bpqether.c b/drivers/net/hamradio/bpqether.c
index 1699d42d13c..85fb8e7efac 100644
--- a/drivers/net/hamradio/bpqether.c
+++ b/drivers/net/hamradio/bpqether.c
@@ -173,6 +173,9 @@ static int bpq_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_ty
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 53fcee26d6a..60c0e4e1787 100644
--- a/drivers/net/pppoe.c
+++ b/drivers/net/pppoe.c
@@ -389,6 +389,9 @@ static int pppoe_rcv(struct sk_buff *skb,
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 @@ static int pppoe_disc_rcv(struct sk_buff *skb,
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 65ad2e24caf..3b57350eacc 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 @@ 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);
diff --git a/drivers/net/wan/lapbether.c b/drivers/net/wan/lapbether.c
index 6c302e9dbca..ca8b3c3cb93 100644
--- a/drivers/net/wan/lapbether.c
+++ b/drivers/net/wan/lapbether.c
@@ -91,6 +91,9 @@ static int lapbeth_rcv(struct sk_buff *skb, struct net_device *dev, struct packe
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 67fc67cfd45..5c71af6ea3a 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 void sppp_print_bytes (u_char *p, u16 len)
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);