diff options
| author | Saurabh Mohan <saurabh.mohan@vyatta.com> | 2012-11-14 18:08:15 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-14 21:40:21 -0500 |
| commit | b2942004fb5c9f3304b77e187b8a1977b3626c9b (patch) | |
| tree | f9c26023e6d43019825e9c7386aa41b4e241bc92 /net | |
| parent | 1ba56fb45a927d083f655302e75a1911a75b5da6 (diff) | |
| download | lwn-b2942004fb5c9f3304b77e187b8a1977b3626c9b.tar.gz lwn-b2942004fb5c9f3304b77e187b8a1977b3626c9b.zip | |
ipv4/ip_vti.c: VTI fix post-decryption forwarding
With the latest kernel there are two things that must be done post decryption
so that the packet are forwarded.
1. Remove the mark from the packet. This will cause the packet to not match
the ipsec-policy again. However doing this causes the post-decryption check to
fail also and the packet will get dropped. (cat /proc/net/xfrm_stat).
2. Remove the sp association in the skbuff so that no policy check is done on
the packet for VTI tunnels.
Due to #2 above we must now do a security-policy check in the vti rcv path
prior to resetting the mark in the skbuff.
Signed-off-by: Saurabh Mohan <saurabh.mohan@vyatta.com>
Reported-by: Ruben Herold <ruben@puettmann.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/ip_vti.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/ipv4/ip_vti.c b/net/ipv4/ip_vti.c index 1831092f999f..858fddf6482a 100644 --- a/net/ipv4/ip_vti.c +++ b/net/ipv4/ip_vti.c @@ -338,12 +338,17 @@ static int vti_rcv(struct sk_buff *skb) if (tunnel != NULL) { struct pcpu_tstats *tstats; + if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) + return -1; + tstats = this_cpu_ptr(tunnel->dev->tstats); u64_stats_update_begin(&tstats->syncp); tstats->rx_packets++; tstats->rx_bytes += skb->len; u64_stats_update_end(&tstats->syncp); + skb->mark = 0; + secpath_reset(skb); skb->dev = tunnel->dev; return 1; } |