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authorEric W. Biederman <ebiederm@xmission.com>2007-09-12 13:02:17 +0200
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 16:49:09 -0700
commite9dc86534051b78e41e5b746cccc291b57a3a311 (patch)
tree1cd4a1dde4c51b6311749428a22cc8a8f5436825 /drivers/net
parente730c15519d09ea528b4d2f1103681fa5937c0e6 (diff)
downloadblackbird-op-linux-e9dc86534051b78e41e5b746cccc291b57a3a311.tar.gz
blackbird-op-linux-e9dc86534051b78e41e5b746cccc291b57a3a311.zip
[NET]: Make device event notification network namespace safe
Every user of the network device notifiers is either a protocol stack or a pseudo device. If a protocol stack that does not have support for multiple network namespaces receives an event for a device that is not in the initial network namespace it quite possibly can get confused and do the wrong thing. To avoid problems until all of the protocol stacks are converted this patch modifies all netdev event handlers to ignore events on devices that are not in the initial network namespace. As the rest of the code is made network namespace aware these checks can be removed. 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_main.c3
-rw-r--r--drivers/net/hamradio/bpqether.c3
-rw-r--r--drivers/net/pppoe.c3
-rw-r--r--drivers/net/wan/dlci.c3
-rw-r--r--drivers/net/wan/hdlc.c3
-rw-r--r--drivers/net/wan/lapbether.c3
6 files changed, 18 insertions, 0 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index e4e5fdc0430b..cf97d8a6326e 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -3299,6 +3299,9 @@ static int bond_netdev_event(struct notifier_block *this, unsigned long event, v
{
struct net_device *event_dev = (struct net_device *)ptr;
+ if (event_dev->nd_net != &init_net)
+ return NOTIFY_DONE;
+
dprintk("event_dev: %s, event: %lx\n",
(event_dev ? event_dev->name : "None"),
event);
diff --git a/drivers/net/hamradio/bpqether.c b/drivers/net/hamradio/bpqether.c
index 85fb8e7efacf..df09210f7351 100644
--- a/drivers/net/hamradio/bpqether.c
+++ b/drivers/net/hamradio/bpqether.c
@@ -563,6 +563,9 @@ static int bpq_device_event(struct notifier_block *this,unsigned long event, voi
{
struct net_device *dev = (struct net_device *)ptr;
+ if (dev->nd_net != &init_net)
+ return NOTIFY_DONE;
+
if (!dev_is_ethdev(dev))
return NOTIFY_DONE;
diff --git a/drivers/net/pppoe.c b/drivers/net/pppoe.c
index 60c0e4e17875..c5c70e4b1d36 100644
--- a/drivers/net/pppoe.c
+++ b/drivers/net/pppoe.c
@@ -301,6 +301,9 @@ static int pppoe_device_event(struct notifier_block *this,
{
struct net_device *dev = (struct net_device *) ptr;
+ if (dev->nd_net != &init_net)
+ return NOTIFY_DONE;
+
/* Only look at sockets that are using this specific device. */
switch (event) {
case NETDEV_CHANGEMTU:
diff --git a/drivers/net/wan/dlci.c b/drivers/net/wan/dlci.c
index 66be20c292b6..61041d5186ac 100644
--- a/drivers/net/wan/dlci.c
+++ b/drivers/net/wan/dlci.c
@@ -513,6 +513,9 @@ static int dlci_dev_event(struct notifier_block *unused,
{
struct net_device *dev = (struct net_device *) ptr;
+ if (dev->nd_net != &init_net)
+ return NOTIFY_DONE;
+
if (event == NETDEV_UNREGISTER) {
struct dlci_local *dlp;
diff --git a/drivers/net/wan/hdlc.c b/drivers/net/wan/hdlc.c
index 3b57350eacca..ee23b91f23d9 100644
--- a/drivers/net/wan/hdlc.c
+++ b/drivers/net/wan/hdlc.c
@@ -109,6 +109,9 @@ static int hdlc_device_event(struct notifier_block *this, unsigned long event,
unsigned long flags;
int on;
+ if (dev->nd_net != &init_net)
+ return NOTIFY_DONE;
+
if (dev->get_stats != hdlc_get_stats)
return NOTIFY_DONE; /* not an HDLC device */
diff --git a/drivers/net/wan/lapbether.c b/drivers/net/wan/lapbether.c
index ca8b3c3cb931..699b93406dfb 100644
--- a/drivers/net/wan/lapbether.c
+++ b/drivers/net/wan/lapbether.c
@@ -394,6 +394,9 @@ static int lapbeth_device_event(struct notifier_block *this,
struct lapbethdev *lapbeth;
struct net_device *dev = ptr;
+ if (dev->nd_net != &init_net)
+ return NOTIFY_DONE;
+
if (!dev_is_ethdev(dev))
return NOTIFY_DONE;
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