Commit 942396b0 authored Oct 22, 2014 by Haiyang Zhang Committed by David S. Miller Oct 22, 2014

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>

parent f765678e

drivers/net/hyperv/netvsc_drv.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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]);