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authorSaurabh Mohan <saurabh.mohan@vyatta.com>2012-11-14 18:08:15 -0800
committerDavid S. Miller <davem@davemloft.net>2012-11-14 21:40:21 -0500
commitb2942004fb5c9f3304b77e187b8a1977b3626c9b (patch)
treef9c26023e6d43019825e9c7386aa41b4e241bc92 /net
parent1ba56fb45a927d083f655302e75a1911a75b5da6 (diff)
downloadvexpress-lsk-b2942004fb5c9f3304b77e187b8a1977b3626c9b.tar.gz
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.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/net/ipv4/ip_vti.c b/net/ipv4/ip_vti.c
index 1831092f999..858fddf6482 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;
}