| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.17 015/319] hyperv: Fix the total_data_buflen in send path | Date | Wed, 12 Nov 2014 10:12:33 +0900 |
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3.17-stable review patch. If anyone has any objections, please let me know.
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From: Haiyang Zhang <haiyangz@microsoft.com>
[ Upstream commit 942396b01989d54977120f3625e5ba31afe7a75c ]
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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/net/hyperv/netvsc_drv.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -556,6 +556,7 @@ 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]);
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