net: sched: cls_matchall: fix null pointer dereference
authorJiri Pirko <jiri@mellanox.com>
Mon, 22 May 2017 14:46:13 +0000 (16:46 +0200)
committerDavid S. Miller <davem@davemloft.net>
Mon, 22 May 2017 18:54:16 +0000 (14:54 -0400)
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>
net/sched/cls_matchall.c

index dee469f..51859b8 100644 (file)
@@ -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: