netdev - [Patch net-next] net_sched: fix suspicious RCU usage in cls_bpf

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Message-Id: <1410816110-10354-1-git-send-email-xiyou.wangcong@gmail.com>
Date:	Mon, 15 Sep 2014 14:21:50 -0700
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	netdev@...r.kernel.org
Cc:	john.fastabend@...il.com, "David S. Miller" <davem@...emloft.net>,
	Cong Wang <xiyou.wangcong@...il.com>
Subject: [Patch net-next] net_sched: fix suspicious RCU usage in cls_bpf_classify()

Fixes: commit 1f947bf151e90ec0baad2948 ("net: sched: rcu'ify cls_bpf")
Cc: John Fastabend <john.fastabend@...il.com>
Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>
---
 net/sched/cls_bpf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sched/cls_bpf.c b/net/sched/cls_bpf.c
index 6a7386e..4e3f5bf 100644
--- a/net/sched/cls_bpf.c
+++ b/net/sched/cls_bpf.c
@@ -52,7 +52,7 @@ static const struct nla_policy bpf_policy[TCA_BPF_MAX + 1] = {
 static int cls_bpf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 			    struct tcf_result *res)
 {
-	struct cls_bpf_head *head = rcu_dereference(tp->root);
+	struct cls_bpf_head *head = rcu_dereference_bh(tp->root);
 	struct cls_bpf_prog *prog;
 	int ret;
 
-- 
1.8.3.1

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