diff options
| author |   Martin Willi <martin@strongswan.org> | 2019-03-26 13:20:43 +0100 |
|---|---|---|
| committer |   Steffen Klassert <steffen.klassert@secunet.com> | 2019-03-27 16:14:05 +0100 |
| commit | 025c65e119bf58b610549ca359c9ecc5dee6a8d2 (patch) | |
| tree | b8a060c8237b6b965b327946043a11e40eae07bc /net/xfrm/xfrm_interface.c | |
| parent | esp4: add length check for UDP encapsulation (diff) | |
| download | linux-dev-025c65e119bf58b610549ca359c9ecc5dee6a8d2.tar.xz linux-dev-025c65e119bf58b610549ca359c9ecc5dee6a8d2.zip | |
xfrm: Honor original L3 slave device in xfrmi policy lookup
If an xfrmi is associated to a vrf layer 3 master device,
xfrm_policy_check() fails after traffic decapsulation. The input
interface is replaced by the layer 3 master device, and hence
xfrmi_decode_session() can't match the xfrmi anymore to satisfy
policy checking.
Extend ingress xfrmi lookup to honor the original layer 3 slave
device, allowing xfrm interfaces to operate within a vrf domain.
Fixes: f203b76d7809 ("xfrm: Add virtual xfrm interfaces")
Signed-off-by: Martin Willi <martin@strongswan.org>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/xfrm/xfrm_interface.c')
| -rw-r--r-- | net/xfrm/xfrm_interface.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/net/xfrm/xfrm_interface.c b/net/xfrm/xfrm_interface.c index dbb3c1945b5c..85fec98676d3 100644 --- a/net/xfrm/xfrm_interface.c +++ b/net/xfrm/xfrm_interface.c @@ -70,17 +70,28 @@ static struct xfrm_if *xfrmi_lookup(struct net *net, struct xfrm_state *x) return NULL; } -static struct xfrm_if *xfrmi_decode_session(struct sk_buff *skb) +static struct xfrm_if *xfrmi_decode_session(struct sk_buff *skb, + unsigned short family) { struct xfrmi_net *xfrmn; - int ifindex; struct xfrm_if *xi; + int ifindex = 0; if (!secpath_exists(skb) || !skb->dev) return NULL; + switch (family) { + case AF_INET6: + ifindex = inet6_sdif(skb); + break; + case AF_INET: + ifindex = inet_sdif(skb); + break; + } + if (!ifindex) + ifindex = skb->dev->ifindex; + xfrmn = net_generic(xs_net(xfrm_input_state(skb)), xfrmi_net_id); - ifindex = skb->dev->ifindex; for_each_xfrmi_rcu(xfrmn->xfrmi[0], xi) { if (ifindex == xi->dev->ifindex && |