[B.A.T.M.A.N.] [RFC PATCH] batman-adv: Add missing hardif_free_ref in forw_packet_free

[Sven Eckelmann <sven@narfation.org>]

add_bcast_packet_to_list increases the refcount for if_incoming but the
reference count is never decreased. This is an regression introduced by
89079aec4c0c2c60a3a2561afcce62538cebd71d.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
This patch is not ready to be applied - just a first note. And before
someone asks - no, it doesn't fix the problem.

 aggregation.c |   14 +++++++++++---
 send.c        |    2 ++
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/aggregation.c b/aggregation.c
index 9b94590..a8c3203 100644
--- a/aggregation.c
+++ b/aggregation.c
@@ -23,6 +23,7 @@
 #include "aggregation.h"
 #include "send.h"
 #include "routing.h"
+#include "hard-interface.h"
 
 /* calculate the size of the tt information for a given packet */
 static int tt_len(struct batman_packet *batman_packet)
@@ -105,12 +106,15 @@ static void new_aggregated_packet(unsigned char *packet_buff, int packet_len,
 	struct forw_packet *forw_packet_aggr;
 	unsigned char *skb_buff;
 
+	if (!atomic_inc_not_zero(&if_incoming->refcount))
+		return;
+
 	/* own packet should always be scheduled */
 	if (!own_packet) {
 		if (!atomic_dec_not_zero(&bat_priv->batman_queue_left)) {
 			bat_dbg(DBG_BATMAN, bat_priv,
 				"batman packet queue full\n");
-			return;
+			goto out;
 		}
 	}
 
@@ -118,7 +122,7 @@ static void new_aggregated_packet(unsigned char *packet_buff, int packet_len,
 	if (!forw_packet_aggr) {
 		if (!own_packet)
 			atomic_inc(&bat_priv->batman_queue_left);
-		return;
+		goto out;
 	}
 
 	if ((atomic_read(&bat_priv->aggregated_ogms)) &&
@@ -133,7 +137,7 @@ static void new_aggregated_packet(unsigned char *packet_buff, int packet_len,
 		if (!own_packet)
 			atomic_inc(&bat_priv->batman_queue_left);
 		kfree(forw_packet_aggr);
-		return;
+		goto out;
 	}
 	skb_reserve(forw_packet_aggr->skb, sizeof(struct ethhdr));
 
@@ -164,6 +168,10 @@ static void new_aggregated_packet(unsigned char *packet_buff, int packet_len,
 	queue_delayed_work(bat_event_workqueue,
 			   &forw_packet_aggr->delayed_work,
 			   send_time - jiffies);
+
+	return;
+out:
+	hardif_free_ref(if_incoming);
 }
 
 /* aggregate a new packet into the existing aggregation */
diff --git a/send.c b/send.c
index f30d0c6..6e83e23 100644
--- a/send.c
+++ b/send.c
@@ -377,6 +377,8 @@ static void forw_packet_free(struct forw_packet *forw_packet)
 {
 	if (forw_packet->skb)
 		kfree_skb(forw_packet->skb);
+	if (forw_packet->if_incoming)
+		hardif_free_ref(forw_packet->if_incoming);
 	kfree(forw_packet);
 }
 
-- 
1.7.5.1