net: sched: cls_matchall: fix null pointer dereference

Since the head is guaranteed by the check above to be null, the call_rcu
would explode. Remove the previously logically dead code that was made
logically very much alive and kicking.

Fixes: 985538eee06f ("net/sched: remove redundant null check on head")
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/cls_matchall.c b/net/sched/cls_matchall.c
index dee469fed9671d518dbeddd6bd48d96cc9158675..51859b8edd7eff3845ca3d5b5b0d900583736d4a 100644 (file)
--- a/net/sched/cls_matchall.c
+++ b/net/sched/cls_matchall.c
@@ -203,7 +203,6 @@ static int mall_change(struct net *net, struct sk_buff *in_skb,
 
        *arg = (unsigned long) head;
        rcu_assign_pointer(tp->root, new);
-       call_rcu(&head->rcu, mall_destroy_rcu);
        return 0;
 
 err_replace_hw_filter: