netdev - [Patch net] act_mirred: clear sender cpu before sending to tx

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Message-Id: <1444177427-5603-1-git-send-email-xiyou.wangcong@gmail.com>
Date:	Tue,  6 Oct 2015 17:23:47 -0700
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	netdev@...r.kernel.org
Cc:	Cong Wang <xiyou.wangcong@...il.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Jamal Hadi Salim <jhs@...atatu.com>,
	Cong Wang <cwang@...pensource.com>
Subject: [Patch net] act_mirred: clear sender cpu before sending to tx

Similar to commit c29390c6dfee ("xps: must clear sender_cpu before forwarding")
the skb->sender_cpu needs to be cleared when moving from Rx
Tx, otherwise kernel could crash.

Cc: Eric Dumazet <edumazet@...gle.com>
Cc: Jamal Hadi Salim <jhs@...atatu.com>
Signed-off-by: Cong Wang <cwang@...pensource.com>
Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>
---
 net/sched/act_mirred.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/sched/act_mirred.c b/net/sched/act_mirred.c
index 2efaf4e..32fcdec 100644
--- a/net/sched/act_mirred.c
+++ b/net/sched/act_mirred.c
@@ -179,6 +179,7 @@ static int tcf_mirred(struct sk_buff *skb, const struct tc_action *a,
 
 	skb2->skb_iif = skb->dev->ifindex;
 	skb2->dev = dev;
+	skb_sender_cpu_clear(skb2);
 	err = dev_queue_xmit(skb2);
 
 	if (err) {
-- 
1.8.3.1

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