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authorEric W. Biederman <ebiederm@xmission.com>2007-09-17 11:53:39 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 16:49:08 -0700
commite730c15519d09ea528b4d2f1103681fa5937c0e6 (patch)
treec117294523f4d004fb1d740610b6403e5744cdfc /net/tipc
parent6d34b1c27a72d5d1c73c567b2f6b1fde316e0eae (diff)
downloadlinux-e730c15519d09ea528b4d2f1103681fa5937c0e6.tar.bz2
[NET]: Make packet reception network namespace safe
This patch modifies every packet receive function registered with dev_add_pack() to drop packets if they are not from the initial network namespace. This should ensure that the various network stacks do not receive packets in a anything but the initial network namespace until the code has been converted and is ready for them. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc')
-rw-r--r--net/tipc/eth_media.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c
index 711ca4b1f051..d2ed23704189 100644
--- a/net/tipc/eth_media.c
+++ b/net/tipc/eth_media.c
@@ -38,6 +38,7 @@
#include <net/tipc/tipc_bearer.h>
#include <net/tipc/tipc_msg.h>
#include <linux/netdevice.h>
+#include <net/net_namespace.h>
#define MAX_ETH_BEARERS 2
#define ETH_LINK_PRIORITY TIPC_DEF_LINK_PRI
@@ -100,6 +101,11 @@ static int recv_msg(struct sk_buff *buf, struct net_device *dev,
struct eth_bearer *eb_ptr = (struct eth_bearer *)pt->af_packet_priv;
u32 size;
+ if (dev->nd_net != &init_net) {
+ kfree_skb(buf);
+ return 0;
+ }
+
if (likely(eb_ptr->bearer)) {
if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
size = msg_size((struct tipc_msg *)buf->data);