netns: restore ops before calling ops_exit_list

ops has been iterated to first element when call pre_exit, and
it needs to restore from save_ops, not save ops to save_ops

Fixes: d7d99872c144 ("netns: add pre_exit method to struct pernet_operations")
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 89dc99a..198ce50 100644 (file)
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -345,7 +345,7 @@ out_undo:
 
        synchronize_rcu();
 
-       saved_ops = ops;
+       ops = saved_ops;
        list_for_each_entry_continue_reverse(ops, &pernet_list, list)
                ops_exit_list(ops, &net_exit_list);