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* [Qemu-devel] [PATCH v9 1/5] qxl/update_area_io: guest_bug on invalid parameters
@ 2012-08-20 13:26 Alon Levy
  2012-08-20 13:26 ` [Qemu-devel] [PATCH v9 2/5] qxl: disallow unknown revisions Alon Levy
                   ` (3 more replies)
  0 siblings, 4 replies; 8+ messages in thread
From: Alon Levy @ 2012-08-20 13:26 UTC (permalink / raw)
  To: qemu-devel, kraxel

Signed-off-by: Alon Levy <alevy@redhat.com>
---
v8->v9:
 * split guest_monitors_config to a subsection (Gerd Hoffman)
 - no change to other patches.

 hw/qxl.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/hw/qxl.c b/hw/qxl.c
index c2dd3b4..6c48eb9 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -1385,6 +1385,18 @@ async_common:
         QXLCookie *cookie = NULL;
         QXLRect update = d->ram->update_area;
 
+        if (d->ram->update_surface > NUM_SURFACES) {
+            qxl_set_guest_bug(d, "QXL_IO_UPDATE_AREA: invalid surface id %d\n",
+                              d->ram->update_surface);
+            return;
+        }
+        if (update.left >= update.right || update.top >= update.bottom) {
+            qxl_set_guest_bug(d,
+                    "QXL_IO_UPDATE_AREA: invalid area (%ux%u)x(%ux%u)\n",
+                    update.left, update.top, update.right, update.bottom);
+            return;
+        }
+
         if (async == QXL_ASYNC) {
             cookie = qxl_cookie_new(QXL_COOKIE_TYPE_IO,
                                     QXL_IO_UPDATE_AREA_ASYNC);
-- 
1.7.11.2

^ permalink raw reply related	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2012-08-21  9:43 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2012-08-20 13:26 [Qemu-devel] [PATCH v9 1/5] qxl/update_area_io: guest_bug on invalid parameters Alon Levy
2012-08-20 13:26 ` [Qemu-devel] [PATCH v9 2/5] qxl: disallow unknown revisions Alon Levy
2012-08-20 13:26 ` [Qemu-devel] [PATCH v9 3/5] qxl: add QXL_IO_MONITORS_CONFIG_ASYNC Alon Levy
2012-08-20 19:52   ` Blue Swirl
2012-08-20 13:26 ` [Qemu-devel] [PATCH v9 4/5] configure: print spice-protocol and spice-server versions Alon Levy
2012-08-20 13:26 ` [Qemu-devel] [PATCH v9 5/5] (temp) FORTIFY_SOURCES hack Alon Levy
2012-08-20 19:49   ` Blue Swirl
2012-08-21  9:43     ` Alon Levy

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