From 43c70ad5ce5691cce24dae6610731694c0f3fcc8 Mon Sep 17 00:00:00 2001 From: Linus Lüssing Date: Sun, 13 Feb 2011 21:13:04 +0000 Subject: batman-adv: Increase orig_node refcount before releasing rcu read lock MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit When unicast_send_skb() is increasing the orig_node's refcount another thread might have been freeing this orig_node already. We need to increase the refcount in the rcu read lock protected area to avoid that. Signed-off-by: Linus Lüssing Signed-off-by: Marek Lindner --- net/batman-adv/unicast.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'net/batman-adv/unicast.c') diff --git a/net/batman-adv/unicast.c b/net/batman-adv/unicast.c index 7ca994ccac1d..0603ceaeef62 100644 --- a/net/batman-adv/unicast.c +++ b/net/batman-adv/unicast.c @@ -293,10 +293,9 @@ int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv) spin_lock_bh(&bat_priv->orig_hash_lock); /* get routing information */ - if (is_multicast_ether_addr(ethhdr->h_dest)) + if (is_multicast_ether_addr(ethhdr->h_dest)) { orig_node = (struct orig_node *)gw_get_selected(bat_priv); - if (orig_node) { - kref_get(&orig_node->refcount); + if (orig_node) goto find_router; } -- cgit v1.2.3-59-g8ed1b