batman-adv: avoid double free when orig_node initialization fails
In the failure path of the orig_node initialization routine
the orig_node->bat_iv.bcast_own field is free'd twice: first
in batadv_iv_ogm_orig_get() and then later in
batadv_orig_node_free_rcu().
Fix it by removing the kfree in batadv_iv_ogm_orig_get().
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 42cbc0a..8323bce 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -241,18 +241,16 @@
size = bat_priv->num_ifaces * sizeof(uint8_t);
orig_node->bat_iv.bcast_own_sum = kzalloc(size, GFP_ATOMIC);
if (!orig_node->bat_iv.bcast_own_sum)
- goto free_bcast_own;
+ goto free_orig_node;
hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig,
batadv_choose_orig, orig_node,
&orig_node->hash_entry);
if (hash_added != 0)
- goto free_bcast_own;
+ goto free_orig_node;
return orig_node;
-free_bcast_own:
- kfree(orig_node->bat_iv.bcast_own);
free_orig_node:
/* free twice, as batadv_orig_node_new sets refcount to 2 */
batadv_orig_node_free_ref(orig_node);