tree 297c76f80d68d56e3c65a23c70de645a1c93df47
parent a4c135c561106c397bae33455acfca4aa8065a30
author Marek Lindner <lindner_marek@yahoo.de> 1297348433 +0000
committer Marek Lindner <lindner_marek@yahoo.de> 1299325803 +0100

batman-adv: Correct rcu refcounting for neigh_node

It might be possible that 2 threads access the same data in the same
rcu grace period. The first thread calls call_rcu() to decrement the
refcount and free the data while the second thread increases the
refcount to use the data. To avoid this race condition all refcount
operations have to be atomic.

Reported-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>