From: KY Srinivasan <kys@microsoft.com>
Date: Mon, 29 Sep 2014 05:16:43 +0000 (-0700)
Subject: hyperv: Fix a bug in netvsc_start_xmit()
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=39a4693e995a8f66cb1a0828a97021c76e10ff89;p=people%2Fms%2Flinux.git

hyperv: Fix a bug in netvsc_start_xmit()

[ Upstream commit dedb845ded56ded1c62f5398a94ffa8615d4592d ]

After the packet is successfully sent, we should not touch the skb
as it may have been freed. This patch is based on the work done by
Long Li <longli@microsoft.com>.

In this version of the patch I have fixed issues pointed out by David.
David, please queue this up for stable.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Tested-by: Long Li <longli@microsoft.com>
Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index bd3b3acd04dc..994ace974742 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -388,6 +388,7 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net)
 	int  hdr_offset;
 	u32 net_trans_info;
 	u32 hash;
+	u32 skb_length = skb->len;
 
 
 	/* We will atmost need two pages to describe the rndis