tree 3f4f844d2311e662b4c42e7a275188d1346ac77d
parent 7d2b554826195372764910da2f0dcb0d9b869108
author Marek Lindner <lindner_marek@yahoo.de> 1297348431 +0000
committer Marek Lindner <lindner_marek@yahoo.de> 1299325807 +0100

batman-adv: Correct rcu refcounting for batman_if

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>