linux-kernel - [PATCH 4.2 16/54] bpf: clear sender

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Message-Id: <20151023174519.584336392@linuxfoundation.org>
Date:	Fri, 23 Oct 2015 10:44:52 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Alexei Starovoitov <ast@...mgrid.com>,
	Daniel Borkmann <daniel@...earbox.net>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.2 16/54] bpf: clear sender_cpu before xmit

4.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alexei Starovoitov <ast@...mgrid.com>

[ Upstream commit 6bf0577374cfb6c2301dbf4934a4f23ad3d72763 ]

Similar to commit c29390c6dfee ("xps: must clear sender_cpu before forwarding")
the skb->sender_cpu needs to be cleared before xmit.

Fixes: 3896d655f4d4 ("bpf: introduce bpf_clone_redirect() helper")
Signed-off-by: Alexei Starovoitov <ast@...mgrid.com>
Acked-by: Daniel Borkmann <daniel@...earbox.net>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/core/filter.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -1412,6 +1412,7 @@ static u64 bpf_clone_redirect(u64 r1, u6
 		return dev_forward_skb(dev, skb2);
 
 	skb2->dev = dev;
+	skb_sender_cpu_clear(skb2);
 	return dev_queue_xmit(skb2);
 }
 


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