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batman-adv: Correct rcu refcounting for softif_neigh
authorMarek Lindner <lindner_marek@yahoo.de>
Thu, 10 Feb 2011 14:33:50 +0000 (14:33 +0000)
committerMarek Lindner <lindner_marek@yahoo.de>
Sat, 5 Mar 2011 11:50:05 +0000 (12:50 +0100)
commit7d2b554826195372764910da2f0dcb0d9b869108
tree364a7b2cdca991b3c6c120e0a1e3bf2c261fb1a1tree | snapshot (tar.gz zip)
parent25b6d3c17eaa92ae9700eb8235bc79782613354acommit | diff
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>
net/batman-adv/soft-interface.c diff | blob | blame | history
net/batman-adv/types.h diff | blob | blame | history