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From: Marek Lindner <mareklindner@neomailbox.ch>
Date: Fri, 7 Sep 2018 05:45:55 +0800
Subject: [PATCH] batman-adv: fix hardif_neigh refcount on queue_work() failure
The hardif_neigh refcounter is to be decreased by the queued work and
currently is never decreased if the queue_work() call fails.
Fix by checking the queue_work() return value and decrease refcount
if necessary.
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/85100b602c127cecf1bcfd620d20eb867d685df2
---
net/batman-adv/bat_v_elp.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/net/batman-adv/bat_v_elp.c b/net/batman-adv/bat_v_elp.c
index e988a14f3eb01de1f52fe6dcaa91af898060140e..2ec0ecab0493ff88fdc01e55c8557de5b772e8bf 100644
--- a/net/batman-adv/bat_v_elp.c
+++ b/net/batman-adv/bat_v_elp.c
@@ -254,6 +254,7 @@ static void batadv_v_elp_periodic_work(struct work_struct *work)
struct batadv_priv *bat_priv;
struct sk_buff *skb;
u32 elp_interval;
+ bool ret;
bat_v = container_of(work, struct batadv_hard_iface_bat_v, elp_wq.work);
hard_iface = container_of(bat_v, struct batadv_hard_iface, bat_v);
@@ -315,8 +316,11 @@ static void batadv_v_elp_periodic_work(struct work_struct *work)
* may sleep and that is not allowed in an rcu protected
* context. Therefore schedule a task for that.
*/
- queue_work(batadv_event_workqueue,
- &hardif_neigh->bat_v.metric_work);
+ ret = queue_work(batadv_event_workqueue,
+ &hardif_neigh->bat_v.metric_work);
+
+ if (!ret)
+ batadv_hardif_neigh_put(hardif_neigh);
}
rcu_read_unlock();
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