The following commit has been merged in the master branch: commit 1f155101646e6f6cda218534ff6e252ff625137b Author: Marek Lindner mareklindner@neomailbox.ch Date: Mon Jun 22 00:36:28 2015 +0800
batman-adv: protect tt request from double deletion
The list_del() calls were changed to list_del_init() to prevent an accidental double deletion in batadv_tt_req_node_new().
Signed-off-by: Marek Lindner mareklindner@neomailbox.ch Signed-off-by: Antonio Quartulli antonio@meshcoding.com
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index 1573489..cd35bb8 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -2196,7 +2196,7 @@ static void batadv_tt_req_list_free(struct batadv_priv *bat_priv) spin_lock_bh(&bat_priv->tt.req_list_lock);
list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { - list_del(&node->list); + list_del_init(&node->list); kfree(node); }
@@ -2232,7 +2232,7 @@ static void batadv_tt_req_purge(struct batadv_priv *bat_priv) list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { if (batadv_has_timed_out(node->issued_at, BATADV_TT_REQUEST_TIMEOUT)) { - list_del(&node->list); + list_del_init(&node->list); kfree(node); } } @@ -2514,7 +2514,8 @@ out: batadv_hardif_free_ref(primary_if); if (ret && tt_req_node) { spin_lock_bh(&bat_priv->tt.req_list_lock); - list_del(&tt_req_node->list); + /* list_del_init() verifies tt_req_node still is in the list */ + list_del_init(&tt_req_node->list); spin_unlock_bh(&bat_priv->tt.req_list_lock); kfree(tt_req_node); } @@ -2951,7 +2952,7 @@ static void batadv_handle_tt_response(struct batadv_priv *bat_priv, list_for_each_entry_safe(node, safe, &bat_priv->tt.req_list, list) { if (!batadv_compare_eth(node->addr, resp_src)) continue; - list_del(&node->list); + list_del_init(&node->list); kfree(node); }