synchronize_rcu respective synchronize_net only waits for the rcu grace period to elapse and we may fail to finish the calls which were made to call_rcu in that time. In result the module could be unloaded during the execution of the RCU callbacks.

rcu_barrier[1] will now wait for all outstanding RCU callbacks to finish before continuing.

[1] Documentation/RCU/rcubarrier.txt

Signed-off-by: Sven Eckelmann sven.eckelmann@gmx.de --- batman-adv/main.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/batman-adv/main.c b/batman-adv/main.c index e8acb46..a067f75 100644 --- a/batman-adv/main.c +++ b/batman-adv/main.c @@ -74,7 +74,7 @@ static void __exit batman_exit(void) destroy_workqueue(bat_event_workqueue); bat_event_workqueue = NULL;

- synchronize_net(); + rcu_barrier(); }

int mesh_init(struct net_device *soft_iface)