batman-adv: Remove orig_node reference handling from send_skb_unicast

The function batadv_send_skb_unicast is not acquiring a reference for an
orig_node nor removing it from any datastructure. It still reduces the
reference counter for an object which is still in the hands of the caller.

This is confusing and can lead in the future to problems in the reference
handling of the caller function.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Acked-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>

diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index 33d8bd14140c746b173ecb259363a2280c9bfdd9..8d4e1f57857455ea5694ed7a8ef014a70cdee7b4 100644 (file)
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -315,8 +315,7 @@ out:
  *
  * Wrap the given skb into a batman-adv unicast or unicast-4addr header
  * depending on whether BATADV_UNICAST or BATADV_UNICAST_4ADDR was supplied
- * as packet_type. Then send this frame to the given orig_node and release a
- * reference to this orig_node.
+ * as packet_type. Then send this frame to the given orig_node.
  *
  * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise.
  */
@@ -370,8 +369,6 @@ int batadv_send_skb_unicast(struct batadv_priv *bat_priv,
                ret = NET_XMIT_SUCCESS;
 
 out:
-       if (orig_node)
-               batadv_orig_node_put(orig_node);
        if (ret == NET_XMIT_DROP)
                kfree_skb(skb);
        return ret;
@@ -403,6 +400,7 @@ int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv,
        struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
        struct batadv_orig_node *orig_node;
        u8 *src, *dst;
+       int ret;
 
        src = ethhdr->h_source;
        dst = ethhdr->h_dest;
@@ -414,8 +412,13 @@ int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv,
        }
        orig_node = batadv_transtable_search(bat_priv, src, dst, vid);
 
-       return batadv_send_skb_unicast(bat_priv, skb, packet_type,
-                                      packet_subtype, orig_node, vid);
+       ret = batadv_send_skb_unicast(bat_priv, skb, packet_type,
+                                     packet_subtype, orig_node, vid);
+
+       if (orig_node)
+               batadv_orig_node_put(orig_node);
+
+       return ret;
 }
 
 /**
@@ -433,10 +436,16 @@ int batadv_send_skb_via_gw(struct batadv_priv *bat_priv, struct sk_buff *skb,
                           unsigned short vid)
 {
        struct batadv_orig_node *orig_node;
+       int ret;
 
        orig_node = batadv_gw_get_selected_orig(bat_priv);
-       return batadv_send_skb_unicast(bat_priv, skb, BATADV_UNICAST_4ADDR,
-                                      BATADV_P_DATA, orig_node, vid);
+       ret = batadv_send_skb_unicast(bat_priv, skb, BATADV_UNICAST_4ADDR,
+                                     BATADV_P_DATA, orig_node, vid);
+
+       if (orig_node)
+               batadv_orig_node_put(orig_node);
+
+       return ret;
 }
 
 /**

diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 216ac03ab43231c88409cf023da3cf56b00ae497..e508bf5957b36a4c914c9d50862ed9ec957b16e6 100644 (file)
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -57,6 +57,7 @@
 #include "hard-interface.h"
 #include "multicast.h"
 #include "network-coding.h"
+#include "originator.h"
 #include "packet.h"
 #include "send.h"
 #include "sysfs.h"
@@ -377,6 +378,8 @@ dropped:
 dropped_freed:
        batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED);
 end:
+       if (mcast_single_orig)
+               batadv_orig_node_put(mcast_single_orig);
        if (primary_if)
                batadv_hardif_put(primary_if);
        return NETDEV_TX_OK;