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authorSteffen Klassert <steffen.klassert@secunet.com>2014-02-21 08:41:09 +0100
committerSteffen Klassert <steffen.klassert@secunet.com>2014-02-25 07:04:17 +0100
commit70be6c91c86596ad2b60c73587880b47df170a41 (patch)
treef1728dd87ed10e66916277f89caef5a261b5a70f /net/xfrm
parentd099160e029391de857464d987b141f30434052b (diff)
xfrm: Add xfrm_tunnel_skb_cb to the skb common buffer
IPsec vti_rcv needs to remind the tunnel pointer to check it later at the vti_rcv_cb callback. So add this pointer to the IPsec common buffer, initialize it and check it to avoid transport state matching of a tunneled packet. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/xfrm')
-rw-r--r--net/xfrm/xfrm_input.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index 99e3a9e5285e..4218164f4f5e 100644
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -163,6 +163,11 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
skb->sp->xvec[skb->sp->len++] = x;
+ if (xfrm_tunnel_check(skb, x, family)) {
+ XFRM_INC_STATS(net, LINUX_MIB_XFRMINSTATEMODEERROR);
+ goto drop;
+ }
+
spin_lock(&x->lock);
if (unlikely(x->km.state == XFRM_STATE_ACQ)) {
XFRM_INC_STATS(net, LINUX_MIB_XFRMACQUIREERROR);

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