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authorHaiyang Zhang <haiyangz@microsoft.com>2014-10-22 13:47:18 -0700
committerDavid S. Miller <davem@davemloft.net>2014-10-22 17:58:50 -0400
commit942396b01989d54977120f3625e5ba31afe7a75c (patch)
treeac54257c97a519c78793b5207bb61562bf4c8963 /drivers/net/hyperv
parentf765678e325b4ae3e2fbdb304fc2d5ee018aa860 (diff)
hyperv: Fix the total_data_buflen in send path
total_data_buflen is used by netvsc_send() to decide if a packet can be put into send buffer. It should also include the size of RNDIS message before the Ethernet frame. Otherwise, a messge with total size bigger than send_section_size may be copied into the send buffer, and cause data corruption. [Request to include this patch to the Stable branches] Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/hyperv')
-rw-r--r--drivers/net/hyperv/netvsc_drv.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 9e17d1a91e71..78ec33f5100b 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -550,6 +550,7 @@ do_lso:
do_send:
/* Start filling in the page buffers with the rndis hdr */
rndis_msg->msg_len += rndis_msg_size;
+ packet->total_data_buflen = rndis_msg->msg_len;
packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size,
skb, &packet->page_buf[0]);