vringh: reset kiov 'consumed' field in __vringh_iov()

__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>
Link: https://lore.kernel.org/r/20210315163450.254396-4-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c
index f681227..bee63d6 100644 (file)
--- 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;