2 files changed, 11 insertions, 1 deletions
diff --git a/hw/display/qxl-render.c b/hw/display/qxl-render.c
index 84f1367716..cc2c2b1dbc 100644
--- a/hw/display/qxl-render.c
+++ b/hw/display/qxl-render.c
@@ -138,6 +138,12 @@ static void qxl_render_update_area_unlocked(PCIQXLDevice *qxl)
         if (qemu_spice_rect_is_empty(qxl->dirty+i)) {
             break;
         }
+        if (qxl->dirty[i].left > qxl->dirty[i].right ||
+            qxl->dirty[i].top > qxl->dirty[i].bottom ||
+            qxl->dirty[i].right > qxl->guest_primary.surface.width ||
+            qxl->dirty[i].bottom > qxl->guest_primary.surface.height) {
+            continue;
+        }
         qxl_blit(qxl, qxl->dirty+i);
         dpy_gfx_update(vga->con,
                        qxl->dirty[i].left, qxl->dirty[i].top,
diff --git a/hw/display/qxl.c b/hw/display/qxl.c
index 7fb83e4eaf..736fd3c4e2 100644
--- a/hw/display/qxl.c
+++ b/hw/display/qxl.c
@@ -710,7 +710,11 @@ static void interface_release_resource(QXLInstance *sin,
 
     if (ext.group_id == MEMSLOT_GROUP_HOST) {
         /* host group -> vga mode update request */
-        qemu_spice_destroy_update(&qxl->ssd, (void *)(intptr_t)ext.info->id);
+        QXLCommandExt *cmdext = (void *)(ext.info->id);
+        SimpleSpiceUpdate *update;
+        g_assert(cmdext->cmd.type == QXL_CMD_DRAW);
+        update = container_of(cmdext, SimpleSpiceUpdate, ext);
+        qemu_spice_destroy_update(&qxl->ssd, update);
         return;
     }