From: Kirill Tkhai <ktk...@virtuozzo.com> Date: Tue, 14 Nov 2017 16:51:56 +0300
> There is at least unlocked deletion of net->ipv4.fib_notifier_ops > from net::fib_notifier_ops: > > ip_fib_net_exit() > rtnl_unlock() > fib4_notifier_exit() > fib_notifier_ops_unregister(net->ipv4.notifier_ops) > list_del_rcu(&ops->list) > > So fib_seq_sum() can't use rtnl_lock() only for protection. > > The possible solution could be to use rtnl_lock() > in fib_notifier_ops_unregister(), but this adds > a possible delay during net namespace creation, > so we better use rcu_read_lock() till someone > really needs the mutex (if that happens). > > Signed-off-by: Kirill Tkhai <ktk...@virtuozzo.com> Applied.
