tree 364a7b2cdca991b3c6c120e0a1e3bf2c261fb1a1
parent 25b6d3c17eaa92ae9700eb8235bc79782613354a
author Marek Lindner <lindner_marek@yahoo.de> 1297348430 +0000
committer Marek Lindner <lindner_marek@yahoo.de> 1299325805 +0100

batman-adv: Correct rcu refcounting for softif_neigh

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>