From 942396b01989d54977120f3625e5ba31afe7a75c Mon Sep 17 00:00:00 2001 From: Haiyang Zhang Date: Wed, 22 Oct 2014 13:47:18 -0700 Subject: [PATCH] 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 Reviewed-by: K. Y. Srinivasan Signed-off-by: David S. Miller --- drivers/net/hyperv/netvsc_drv.c | 1 + 1 file changed, 1 insertion(+) 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]); -- 2.20.1