netfilter: flowtable: Add FLOW_OFFLOAD_XMIT_UNSPEC xmit type

It could be xmit type was not set and would default to FLOW_OFFLOAD_XMIT_NEIGH
and in this type the gc expect to have a route info.
Fix that by adding FLOW_OFFLOAD_XMIT_UNSPEC which defaults to 0.

Fixes: 8b9229d15877 ("netfilter: flowtable: dst_check() from garbage collector path")
Signed-off-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/include/net/netfilter/nf_flow_table.h b/include/net/netfilter/nf_flow_table.h
index d46e422..51d8eb9 100644 (file)
--- a/include/net/netfilter/nf_flow_table.h
+++ b/include/net/netfilter/nf_flow_table.h
@@ -92,7 +92,8 @@ enum flow_offload_tuple_dir {
 #define FLOW_OFFLOAD_DIR_MAX   IP_CT_DIR_MAX
 
 enum flow_offload_xmit_type {
-       FLOW_OFFLOAD_XMIT_NEIGH         = 0,
+       FLOW_OFFLOAD_XMIT_UNSPEC        = 0,
+       FLOW_OFFLOAD_XMIT_NEIGH,
        FLOW_OFFLOAD_XMIT_XFRM,
        FLOW_OFFLOAD_XMIT_DIRECT,
 };

diff --git a/net/netfilter/nf_flow_table_core.c b/net/netfilter/nf_flow_table_core.c
index 76573ba..39c02d1 100644 (file)
--- a/net/netfilter/nf_flow_table_core.c
+++ b/net/netfilter/nf_flow_table_core.c
@@ -130,6 +130,9 @@ static int flow_offload_fill_route(struct flow_offload *flow,
                flow_tuple->dst_cache = dst;
                flow_tuple->dst_cookie = flow_offload_dst_cookie(flow_tuple);
                break;
+       default:
+               WARN_ON_ONCE(1);
+               break;
        }
        flow_tuple->xmit_type = route->tuple[dir].xmit_type;