[PATCH 69/77] libvhost-user: Report descriptor index on panic

[Michael Roth]

From: 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>
Message-Id: <20200723171935.18535-1-philmd@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Cc: qemu-stable@nongnu.org
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 8fe9805c73c277dc2feeaa83de73d6a58bf23f39)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.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 3bca996c62..301f6d68b3 100644
--- a/contrib/libvhost-user/libvhost-user.c
+++ b/contrib/libvhost-user/libvhost-user.c
@@ -1867,7 +1867,7 @@ 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;
     }
 
@@ -1926,7 +1926,7 @@ 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;
     }
 
-- 
2.17.1