From f9aceca39d40c373f5f1a0866059f8347101a3d5 Mon Sep 17 00:00:00 2001 From: KY Srinivasan Date: Sun, 28 Sep 2014 22:16:43 -0700 Subject: [PATCH] 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 . 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 Tested-by: Long Li Tested-by: Sitsofe Wheeler Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/hyperv/netvsc_drv.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index aea78fc..59e9c56 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -138,6 +138,7 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) struct hv_netvsc_packet *packet; int ret; unsigned int i, num_pages, npg_data; + u32 skb_length = skb->len; /* Add multipages for skb->data and additional 2 for RNDIS */ npg_data = (((unsigned long)skb->data + skb_headlen(skb) - 1) @@ -208,7 +209,7 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) ret = rndis_filter_send(net_device_ctx->device_ctx, packet); if (ret == 0) { - net->stats.tx_bytes += skb->len; + net->stats.tx_bytes += skb_length; net->stats.tx_packets++; } else { kfree(packet); -- 2.7.4