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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/wan
parente730c15519d09ea528b4d2f1103681fa5937c0e6 (diff)
[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/wan')
-rw-r--r--drivers/net/wan/dlci.c3
-rw-r--r--drivers/net/wan/hdlc.c3
-rw-r--r--drivers/net/wan/lapbether.c3
3 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/wan/dlci.c b/drivers/net/wan/dlci.c
index 66be20c292b..61041d5186a 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 3b57350eacc..ee23b91f23d 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 ca8b3c3cb93..699b93406df 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;