File 0135-virtio-gpu-check-max_outputs-only.patch of Package qemu-linux-user.15026

From cf68435dc5bf625167f0eb9d945381a886033b6e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@redhat.com>
Date: Thu, 19 May 2016 12:25:58 +0200
Subject: [PATCH] virtio-gpu: check max_outputs only
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The scanout id should not be above the configured num_scanouts.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 1463653560-26958-5-git-send-email-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit 2fe760554eb3769d70f608a158474f728ba45ba6)
[BR: CVE-2016-10029 BSC#1017081 BSC#1016504]
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 hw/display/virtio-gpu-3d.c | 4 ++--
 hw/display/virtio-gpu.c    | 5 ++---
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/hw/display/virtio-gpu-3d.c b/hw/display/virtio-gpu-3d.c
index ec1782e37b..e08038f80e 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 1a3cdd7459..f4216bedfc 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -470,7 +470,7 @@ 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;
@@ -513,8 +513,7 @@ 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 >= VIRTIO_GPU_MAX_SCANOUT ||
-        ss.scanout_id >= g->conf.max_outputs) {
+    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;