From e9dc86534051b78e41e5b746cccc291b57a3a311 Mon Sep 17 00:00:00 2001 From: Eric W. Biederman Date: Wed, 12 Sep 2007 13:02:17 +0200 Subject: [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 Signed-off-by: David S. Miller --- net/netrom/af_netrom.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'net/netrom') diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c index e969d1bc765c..3a4d479ea64e 100644 --- a/net/netrom/af_netrom.c +++ b/net/netrom/af_netrom.c @@ -106,6 +106,9 @@ static int nr_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 (event != NETDEV_DOWN) return NOTIFY_DONE; -- cgit v1.2.3