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[PULL v2 4/6] libvhost-user: Report descriptor index on panic

From: Michael S. Tsirkin
Subject: [PULL v2 4/6] libvhost-user: Report descriptor index on panic
Date: Mon, 27 Jul 2020 10:32:14 -0400

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>
 contrib/libvhost-user/libvhost-user.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/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 
     if (*next >= max) {
-        vu_panic(dev, "Desc next is %u", next);
+        vu_panic(dev, "Desc next is %u", *next);

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