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| author | Eric W. Biederman <ebiederm@xmission.com> | 2007-09-17 11:53:39 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 16:49:08 -0700 |
| commit | e730c15519d09ea528b4d2f1103681fa5937c0e6 (patch) | |
| tree | c117294523f4d004fb1d740610b6403e5744cdfc /net/ipv4/ipconfig.c | |
| parent | 6d34b1c27a72d5d1c73c567b2f6b1fde316e0eae (diff) | |
| download | linux-e730c15519d09ea528b4d2f1103681fa5937c0e6.tar.gz linux-e730c15519d09ea528b4d2f1103681fa5937c0e6.tar.bz2 linux-e730c15519d09ea528b4d2f1103681fa5937c0e6.zip | |
[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/ipv4/ipconfig.c')
| -rw-r--r-- | net/ipv4/ipconfig.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c index 5ae4849878a3..08ff623371f0 100644 --- a/net/ipv4/ipconfig.c +++ b/net/ipv4/ipconfig.c @@ -426,6 +426,9 @@ ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt unsigned char *sha, *tha; /* s for "source", t for "target" */ struct ic_device *d; + if (dev->nd_net != &init_net) + goto drop; + if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) return NET_RX_DROP; @@ -835,6 +838,9 @@ static int __init ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, str struct ic_device *d; int len, ext_len; + if (dev->nd_net != &init_net) + goto drop; + /* Perform verifications before taking the lock. */ if (skb->pkt_type == PACKET_OTHERHOST) goto drop; |