[Qemu-devel] [PATCH 3/6] virtio-gpu: check max_outputs value

[marcandre . lureau]

From: Marc-André Lureau <address@hidden>

The value must be less than VIRTIO_GPU_MAX_SCANOUT.

Signed-off-by: Marc-André Lureau <address@hidden>
---
 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 1193838..77e542f 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);
@@ -928,6 +929,11 @@ 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,
-- 
2.7.4