[PATCH-for-5.1] libvhost-user: Report descriptor index on panic

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

We want to report the index of the descriptor,
not its pointer.

Fixes: 7b2e5c65f4 ("contrib: add libvhost-user")
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 contrib/libvhost-user/libvhost-user.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/contrib/libvhost-user/libvhost-user.c b/contrib/libvhost-user/libvhost-user.c
index d315db1396..53f16bdf08 100644
--- a/contrib/libvhost-user/libvhost-user.c
+++ b/contrib/libvhost-user/libvhost-user.c
@@ -2074,7 +2074,7 @@ virtqueue_get_head(VuDev *dev, VuVirtq *vq,
 
     /* If their number is silly, that's a fatal mistake. */
     if (*head >= vq->vring.num) {
-        vu_panic(dev, "Guest says index %u is available", head);
+        vu_panic(dev, "Guest says index %u is available", *head);
         return false;
     }
 
@@ -2133,7 +2133,7 @@ virtqueue_read_next_desc(VuDev *dev, struct vring_desc *desc,
     smp_wmb();
 
     if (*next >= max) {
-        vu_panic(dev, "Desc next is %u", next);
+        vu_panic(dev, "Desc next is %u", *next);
         return VIRTQUEUE_READ_DESC_ERROR;
     }
 
-- 
2.21.3