diff options
| author | Marek Lindner <mareklindner@neomailbox.ch> | 2015-06-21 18:36:28 +0200 |
|---|---|---|
| committer | Antonio Quartulli <antonio@meshcoding.com> | 2015-08-14 22:52:09 +0200 |
| commit | 1f155101646e6f6cda218534ff6e252ff625137b (patch) | |
| tree | 5a2186c2125657c96fa4a682ecf24080d9696395 /net/batman-adv | |
| parent | batman-adv: Fix potential synchronization issues in mcast tvlv handler (diff) | |
| download | linux-1f155101646e6f6cda218534ff6e252ff625137b.tar.xz linux-1f155101646e6f6cda218534ff6e252ff625137b.zip | |
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>
Diffstat (limited to 'net/batman-adv')
| -rw-r--r-- | net/batman-adv/translation-table.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index 1573489c1f8a..cd35bb846582 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); } |