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authorEric W. Biederman <ebiederm@xmission.com>2007-09-12 07:02:17 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 19:49:09 -0400
commite9dc86534051b78e41e5b746cccc291b57a3a311 (patch)
tree1cd4a1dde4c51b6311749428a22cc8a8f5436825 /net/appletalk/aarp.c
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 'net/appletalk/aarp.c')
-rw-r--r--net/appletalk/aarp.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/appletalk/aarp.c b/net/appletalk/aarp.c
index 9267f4818795..e9a51a69870e 100644
--- a/net/appletalk/aarp.c
+++ b/net/appletalk/aarp.c
@@ -333,6 +333,9 @@ static int aarp_device_event(struct notifier_block *this, unsigned long event,
333 struct net_device *dev = ptr; 333 struct net_device *dev = ptr;
334 int ct; 334 int ct;
335 335
336 if (dev->nd_net != &init_net)
337 return NOTIFY_DONE;
338
336 if (event == NETDEV_DOWN) { 339 if (event == NETDEV_DOWN) {
337 write_lock_bh(&aarp_lock); 340 write_lock_bh(&aarp_lock);
338 341