tree f0900101542966e0655ca5f115b5b0bc409b1e74
parent 7aadf889e897155c45cda230d2a6701ad1fbff61
author Marek Lindner <lindner_marek@yahoo.de> 1298032090 +0000
committer Marek Lindner <lindner_marek@yahoo.de> 1299325921 +0100

batman-adv: Correct rcu refcounting for orig_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>