[PATCH 4.9 60/90] batman-adv: Fix check of retrieved orig_gw in batadv_v_gw_is_eligible

[Greg Kroah-Hartman]

From: Sven Eckelmann <sven.eckelmann@xxxxxxxxxxxx>

commit 198a62ddffa4a4ffaeb741f642b7b52f2d91ae9b upstream.

The batadv_v_gw_is_eligible function already assumes that orig_node is not
NULL. But batadv_gw_node_get may have failed to find the originator. It
must therefore be checked whether the batadv_gw_node_get failed and not
whether orig_node is NULL to detect this error.

Fixes: 50164d8f500f ("batman-adv: B.A.T.M.A.N. V - implement GW selection logic")
Signed-off-by: Sven Eckelmann <sven.eckelmann@xxxxxxxxxxxx>
Acked-by: Antonio Quartulli <a@xxxxxxxxxxx>
Signed-off-by: Simon Wunderlich <sw@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/batman-adv/bat_v.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/batman-adv/bat_v.c
+++ b/net/batman-adv/bat_v.c
@@ -814,7 +814,7 @@ static bool batadv_v_gw_is_eligible(stru
 	}
 
 	orig_gw = batadv_gw_node_get(bat_priv, orig_node);
-	if (!orig_node)
+	if (!orig_gw)
 		goto out;
 
 	if (batadv_v_gw_throughput_get(orig_gw, &orig_throughput) < 0)