xfrm: force a dst reference in __xfrm_route_forward()
Packets going through __xfrm_route_forward() have a not refcounted dst
entry, since we enabled a noref forwarding path.
xfrm_lookup() might incorrectly release this dst entry.
It's a bit late to make invasive changes in xfrm_lookup(), so lets force
a refcount in this path.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index d965a2b..4bf27d9 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -2153,6 +2153,7 @@
return 0;
}
+ skb_dst_force(skb);
dst = skb_dst(skb);
res = xfrm_lookup(net, &dst, &fl, NULL, 0) == 0;