netdev - [PATCH net-next] bpf, skb_do_redirect: clear sender

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Message-Id: <ceae3b812d3e01f73efcfdff0a7817b3c61ae24e.1444205375.git.daniel@iogearbox.net>
Date:	Wed,  7 Oct 2015 10:16:09 +0200
From:	Daniel Borkmann <daniel@...earbox.net>
To:	davem@...emloft.net
Cc:	ast@...mgrid.com, edumazet@...gle.com, netdev@...r.kernel.org,
	Daniel Borkmann <daniel@...earbox.net>
Subject: [PATCH net-next] bpf, skb_do_redirect: clear sender_cpu before xmit

Similar to commit c29390c6dfee ("xps: must clear sender_cpu before
forwarding"), we also need to clear the skb->sender_cpu when moving
from RX to TX via skb_do_redirect() due to the shared location of
napi_id (used on RX) and sender_cpu (used on TX).

Fixes: 27b29f63058d ("bpf: add bpf_redirect() helper")
Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
---
 ( It's also needed here in the net-next commit 27b29f63058d. )

 net/core/filter.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/core/filter.c b/net/core/filter.c
index da3e535..8f4603c 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -1462,6 +1462,7 @@ int skb_do_redirect(struct sk_buff *skb)
 		return dev_forward_skb(dev, skb);
 
 	skb->dev = dev;
+	skb_sender_cpu_clear(skb);
 	return dev_queue_xmit(skb);
 }
 
-- 
1.9.3

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