commit 80dcbd12fb30932bb001b913ffe36843e2a1fe3a
author WANG Cong <xiyou.wangcong@gmail.com> Mon Sep 15 14:21:50 2014 -0700
committer David S. Miller <davem@davemloft.net> Mon Sep 15 17:42:08 2014 -0400
tree 5cb32c8f55427995cdcbce622dbd8fce602e4c42
parent 0486b60a8c62d3a9470374601dbd2f5f03afb1dd

net_sched: fix suspicious RCU usage in cls_bpf_classify()

Fixes: commit 1f947bf151e90ec0baad2948 ("net: sched: rcu'ify cls_bpf")
Cc: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/cls_bpf.c

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 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;