batman-adv: protect ogm counter arrays with spinlock
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index fcdb0b7..71dfc24 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -207,6 +207,7 @@
return NULL;
INIT_HLIST_HEAD(&orig_node->neigh_list);
+ spin_lock_init(&orig_node->ogm_cnt_lock);
spin_lock_init(&orig_node->neigh_list_lock);
kref_init(&orig_node->refcount);
@@ -517,7 +518,7 @@
struct hlist_head *head;
struct element_t *bucket;
struct orig_node *orig_node;
- int i;
+ int i, ret;
/* resize all orig nodes because orig_node->bcast_own(_sum) depend on
* if_num */
@@ -530,7 +531,11 @@
hlist_for_each_entry_rcu(bucket, walk, head, hlist) {
orig_node = bucket->data;
- if (orig_node_add_if(orig_node, max_if_num) == -1)
+ spin_lock_bh(&orig_node->ogm_cnt_lock);
+ ret = orig_node_add_if(orig_node, max_if_num);
+ spin_unlock_bh(&orig_node->ogm_cnt_lock);
+
+ if (ret == -1)
goto err;
}
rcu_read_unlock();
@@ -619,8 +624,10 @@
hlist_for_each_entry_rcu(bucket, walk, head, hlist) {
orig_node = bucket->data;
+ spin_lock_bh(&orig_node->ogm_cnt_lock);
ret = orig_node_del_if(orig_node, max_if_num,
batman_if->if_num);
+ spin_unlock_bh(&orig_node->ogm_cnt_lock);
if (ret == -1)
goto err;