[PATCH v4 03/14] vringh: reset kiov 'consumed' field in __vringh_iov()

From: Stefano Garzarella <sgarzare@redhat.com>
To: virtualization@lists.linux-foundation.org
Cc: netdev@vger.kernel.org, Xie Yongji <xieyongji@bytedance.com>,
	Laurent Vivier <lvivier@redhat.com>,
	Stefan Hajnoczi <stefanha@redhat.com>,
	linux-kernel@vger.kernel.org, Max Gurtovoy <mgurtovoy@nvidia.com>,
	Jason Wang <jasowang@redhat.com>, Parav Pandit <parav@nvidia.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	kvm@vger.kernel.org
Subject: [PATCH v4 03/14] vringh: reset kiov 'consumed' field in __vringh_iov()
Date: Mon, 15 Mar 2021 17:34:39 +0100	[thread overview]
Message-ID: <20210315163450.254396-4-sgarzare@redhat.com> (raw)
In-Reply-To: <20210315163450.254396-1-sgarzare@redhat.com>

__vringh_iov() overwrites the contents of riov and wiov, in fact it
resets the 'i' and 'used' fields, but also the 'consumed' field should
be reset to avoid an inconsistent state.

Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
 drivers/vhost/vringh.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c
index f68122705719..bee63d68201a 100644
--- a/drivers/vhost/vringh.c
+++ b/drivers/vhost/vringh.c
@@ -290,9 +290,9 @@ __vringh_iov(struct vringh *vrh, u16 i,
 		return -EINVAL;
 
 	if (riov)
-		riov->i = riov->used = 0;
+		riov->i = riov->used = riov->consumed = 0;
 	if (wiov)
-		wiov->i = wiov->used = 0;
+		wiov->i = wiov->used = wiov->consumed = 0;
 
 	for (;;) {
 		void *addr;
-- 
2.30.2

