File 0134-virtio-gpu-check-max_outputs-value.patch of Package qemu.19799

From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@redhat.com>
Date: Thu, 19 May 2016 12:25:57 +0200
Subject: virtio-gpu: check max_outputs value
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The value must be less than VIRTIO_GPU_MAX_SCANOUT.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 1463653560-26958-4-git-send-email-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/display/virtio-gpu.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index 10e3ae2fab2d611b5bdd679a82fc..1a3cdd74591b90a131026b611599 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -19,6 +19,7 @@
 #include "hw/virtio/virtio.h"
 #include "hw/virtio/virtio-gpu.h"
 #include "hw/virtio/virtio-bus.h"
+#include "qapi/error.h"
 
 static struct virtio_gpu_simple_resource*
 virtio_gpu_find_resource(VirtIOGPU *g, uint32_t resource_id);
@@ -933,6 +934,11 @@ static void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
     bool have_virgl;
     int i;
 
+    if (g->conf.max_outputs > VIRTIO_GPU_MAX_SCANOUT) {
+        error_setg(errp, "invalid max_outputs > %d", VIRTIO_GPU_MAX_SCANOUT);
+        return;
+    }
+
     g->config_size = sizeof(struct virtio_gpu_config);
     g->virtio_config.num_scanouts = g->conf.max_outputs;
     virtio_init(VIRTIO_DEVICE(g), "virtio-gpu", VIRTIO_ID_GPU,