qemu/0107-qxl-update_area_io-guest_bug-on-invalid-parameters.patch

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2012-10-28 18:05:07 +00:00
From 8a3d428e1e0f3e4793b1a1353c638e155a3a8a86 Mon Sep 17 00:00:00 2001
From: Alon Levy <alevy@redhat.com>
Date: Tue, 21 Aug 2012 13:51:31 +0300
2012-10-28 18:05:07 +00:00
Subject: [PATCH] qxl/update_area_io: guest_bug on invalid parameters
Signed-off-by: Alon Levy <alevy@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2012-10-28 18:05:07 +00:00
(cherry picked from commit 511b13e2c9b426b3c56060909693de5097f0b496)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
hw/qxl.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/hw/qxl.c b/hw/qxl.c
index 95bbc03..baf9bb4 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -1386,6 +1386,18 @@ 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);
--
1.8.0.2