batman-adv: protect each hash row with rcu locks

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/batman-adv/icmp_socket.c b/net/batman-adv/icmp_socket.c
index 319a7ccf6efa..8e0cd8a1bc02 100644
--- a/net/batman-adv/icmp_socket.c
+++ b/net/batman-adv/icmp_socket.c
@@ -220,9 +220,11 @@ static ssize_t bat_socket_write(struct file *file, const char __user *buff,
                 goto dst_unreach;
 
         spin_lock_bh(&bat_priv->orig_hash_lock);
+        rcu_read_lock();
         orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
                                                    compare_orig, choose_orig,
                                                    icmp_packet->dst));
+        rcu_read_unlock();
 
         if (!orig_node)
                 goto unlock;