[patch net-next] net: sched: cls_matchall: fix null pointer dereference

[Jiri Pirko]

From: Jiri Pirko <j...@mellanox.com>

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 <j...@mellanox.com>
---
 net/sched/cls_matchall.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/net/sched/cls_matchall.c b/net/sched/cls_matchall.c
index dee469f..51859b8 100644
--- 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:
-- 
2.9.3