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authorEric W. Biederman <ebiederm@xmission.com>2007-09-17 22:53:39 +0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-11 03:49:08 +0400
commite730c15519d09ea528b4d2f1103681fa5937c0e6 (patch)
treec117294523f4d004fb1d740610b6403e5744cdfc /net/llc/llc_input.c
parent6d34b1c27a72d5d1c73c567b2f6b1fde316e0eae (diff)
downloadlinux-e730c15519d09ea528b4d2f1103681fa5937c0e6.tar.xz
[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/llc/llc_input.c')
-rw-r--r--net/llc/llc_input.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/llc/llc_input.c b/net/llc/llc_input.c
index 099ed8fec145..c40c9b2a345a 100644
--- a/net/llc/llc_input.c
+++ b/net/llc/llc_input.c
@@ -12,6 +12,7 @@
* See the GNU General Public License for more details.
*/
#include <linux/netdevice.h>
+#include <net/net_namespace.h>
#include <net/llc.h>
#include <net/llc_pdu.h>
#include <net/llc_sap.h>
@@ -145,6 +146,9 @@ int llc_rcv(struct sk_buff *skb, struct net_device *dev,
int (*rcv)(struct sk_buff *, struct net_device *,
struct packet_type *, struct net_device *);
+ if (dev->nd_net != &init_net)
+ goto drop;
+
/*
* When the interface is in promisc. mode, drop all the crap that it
* receives, do not try to analyse it.