[IPSEC]: Use the correct family for input state lookup

When merging the input paths of IPsec I accidentally left a hard-coded
AF_INET for the state lookup call.  This broke IPv6 obviously.  This
patch fixes by getting the input callers to specify the family through
skb->cb.

Credit goes to Kazunori Miyazawa for diagnosing this and providing an
initial patch.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 1 deletions

diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index 96f42c1d2e8e..8b2b1b59133e 100644
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -102,6 +102,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
         __be32 seq;
         struct xfrm_state *x;
         xfrm_address_t *daddr;
+        unsigned int family;
         int decaps = 0;
         int async = 0;
 
@@ -127,6 +128,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
 
         daddr = (xfrm_address_t *)(skb_network_header(skb) +
                                    XFRM_SPI_SKB_CB(skb)->daddroff);
+        family = XFRM_SPI_SKB_CB(skb)->family;
 
         seq = 0;
         if (!spi && (err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) != 0)
@@ -136,7 +138,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
                 if (skb->sp->len == XFRM_MAX_DEPTH)
                         goto drop;
 
-                x = xfrm_state_lookup(daddr, spi, nexthdr, AF_INET);
+                x = xfrm_state_lookup(daddr, spi, nexthdr, family);
                 if (x == NULL)
                         goto drop;
 
@@ -198,6 +200,7 @@ resume:
                  * transport mode so the outer address is identical.
                  */
                 daddr = &x->id.daddr;
+                family = x->outer_mode->afinfo->family;
 
                 err = xfrm_parse_spi(skb, nexthdr, &spi, &seq);
                 if (err < 0)