[Qemu-stable] [PATCH for v2.6.0 1/2] virtio-gpu: check max_outputs only

[P J P]

From: Marc-André Lureau <address@hidden>

The scanout id should not be above the configured num_scanouts.

Signed-off-by: Marc-André Lureau <address@hidden>
Message-id: address@hidden
Signed-off-by: Gerd Hoffmann <address@hidden>
(cherry picked from commit 2fe760554eb3769d70f608a158474f728ba45ba6)
Signed-off-by: Prasad J Pandit <address@hidden>
---
 hw/display/virtio-gpu-3d.c | 4 ++--
 hw/display/virtio-gpu.c    | 9 ++++++++-
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/hw/display/virtio-gpu-3d.c b/hw/display/virtio-gpu-3d.c
index fa19294..feb9ca7 100644
--- a/hw/display/virtio-gpu-3d.c
+++ b/hw/display/virtio-gpu-3d.c
@@ -127,7 +127,7 @@ static void virgl_cmd_resource_flush(VirtIOGPU *g,
     trace_virtio_gpu_cmd_res_flush(rf.resource_id,
                                    rf.r.width, rf.r.height, rf.r.x, rf.r.y);
 
-    for (i = 0; i < VIRTIO_GPU_MAX_SCANOUT; i++) {
+    for (i = 0; i < g->conf.max_outputs; i++) {
         if (g->scanout[i].resource_id != rf.resource_id) {
             continue;
         }
@@ -146,7 +146,7 @@ static void virgl_cmd_set_scanout(VirtIOGPU *g,
     trace_virtio_gpu_cmd_set_scanout(ss.scanout_id, ss.resource_id,
                                      ss.r.width, ss.r.height, ss.r.x, ss.r.y);
 
-    if (ss.scanout_id >= VIRTIO_GPU_MAX_SCANOUT) {
+    if (ss.scanout_id >= g->conf.max_outputs) {
         qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal scanout id specified %d",
                       __func__, ss.scanout_id);
         cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_SCANOUT_ID;
diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index c181fb3..e14ee78 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -464,7 +464,7 @@ static void virtio_gpu_resource_flush(VirtIOGPU *g,
 
     pixman_region_init_rect(&flush_region,
                             rf.r.x, rf.r.y, rf.r.width, rf.r.height);
-    for (i = 0; i < VIRTIO_GPU_MAX_SCANOUT; i++) {
+    for (i = 0; i < g->conf.max_outputs; i++) {
         struct virtio_gpu_scanout *scanout;
         pixman_region16_t region, finalregion;
         pixman_box16_t *extents;
@@ -507,6 +507,13 @@ static void virtio_gpu_set_scanout(VirtIOGPU *g,
     trace_virtio_gpu_cmd_set_scanout(ss.scanout_id, ss.resource_id,
                                      ss.r.width, ss.r.height, ss.r.x, ss.r.y);
 
+    if (ss.scanout_id >= g->conf.max_outputs) {
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: illegal scanout id specified %d",
+                      __func__, ss.scanout_id);
+        cmd->error = VIRTIO_GPU_RESP_ERR_INVALID_SCANOUT_ID;
+        return;
+    }
+
     g->enable = 1;
     if (ss.resource_id == 0) {
         scanout = &g->scanout[ss.scanout_id];
-- 
2.9.3