From: Stephen Hemminger <stephen@networkplumber.org>
Date: Thu, 5 Oct 2017 17:35:05 -0700
Patch-mainline: v4.15-rc1
Subject: vmbus: initialize reserved fields in messages
Git-commit: 33d426a957dfc9bea13c4e05d0319b1d0a854586
References: fate#323887

Make sure and initialize reserved fields in messages to host,
rather than passing stack junk.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Olaf Hering <ohering@suse.de>
---
 drivers/hv/channel.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -745,6 +745,7 @@ int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel,
 	desc.dataoffset8 = descsize >> 3; /* in 8-bytes granularity */
 	desc.length8 = (u16)(packetlen_aligned >> 3);
 	desc.transactionid = requestid;
+	desc.reserved = 0;
 	desc.rangecount = pagecount;
 
 	for (i = 0; i < pagecount; i++) {
@@ -788,6 +789,7 @@ int vmbus_sendpacket_mpb_desc(struct vmbus_channel *channel,
 	desc->dataoffset8 = desc_size >> 3; /* in 8-bytes granularity */
 	desc->length8 = (u16)(packetlen_aligned >> 3);
 	desc->transactionid = requestid;
+	desc->reserved = 0;
 	desc->rangecount = 1;
 
 	bufferlist[0].iov_base = desc;