[PATCH net 8/8] batman-adv: bla: put backbone reference on failed claim hash insert

[Simon Wunderlich <sw@simonwunderlich.de>]

From: Sven Eckelmann <sven@narfation.org>

When batadv_bla_add_claim() fails to insert a new claim into the hash, it
leaked a reference to the backbone_gw for which the claim was intended.
Call batadv_backbone_gw_put() on the error path to release the reference
and avoid leaking the backbone_gw object.

Cc: stable@kernel.org
Fixes: 3db0decf1185 ("batman-adv: Fix non-atomic bla_claim::backbone_gw access")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
---
 net/batman-adv/bridge_loop_avoidance.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
index 879ab043d57a9..cec11f1251d66 100644
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -723,6 +723,7 @@ static void batadv_bla_add_claim(struct batadv_priv *bat_priv,
 
 		if (unlikely(hash_added != 0)) {
 			/* only local changes happened. */
+			batadv_backbone_gw_put(backbone_gw);
 			kfree(claim);
 			return;
 		}
-- 
2.47.3