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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/packet
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/packet')
-rw-r--r--net/packet/af_packet.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index cae1ee4f2ad6..ad0052524e88 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1477,6 +1477,9 @@ static int packet_notifier(struct notifier_block *this, unsigned long msg, void
1477 struct hlist_node *node; 1477 struct hlist_node *node;
1478 struct net_device *dev = data; 1478 struct net_device *dev = data;
1479 1479
1480 if (dev->nd_net != &init_net)
1481 return NOTIFY_DONE;
1482
1480 read_lock(&packet_sklist_lock); 1483 read_lock(&packet_sklist_lock);
1481 sk_for_each(sk, node, &packet_sklist) { 1484 sk_for_each(sk, node, &packet_sklist) {
1482 struct packet_sock *po = pkt_sk(sk); 1485 struct packet_sock *po = pkt_sk(sk);