https://lists.gnu.org/archive/html/qemu-devel/2016-11/msg05043.html
https://bugs.gentoo.org/602630

From:	Li Qiang
Subject:	[Qemu-devel] [PATCH] virtio-gpu: call cleanup mapping function in resource destroy
Date:	Mon, 28 Nov 2016 21:29:25 -0500
If the guest destroy the resource before detach banking, the 'iov'
and 'addrs' field in resource is not freed thus leading memory
leak issue. This patch avoid this.

Signed-off-by: Li Qiang <address@hidden>
---
 hw/display/virtio-gpu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index 60bce94..98dadf2 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -28,6 +28,8 @@
 static struct virtio_gpu_simple_resource*
 virtio_gpu_find_resource(VirtIOGPU *g, uint32_t resource_id);
 
+static void virtio_gpu_cleanup_mapping(struct virtio_gpu_simple_resource *res);
+
 #ifdef CONFIG_VIRGL
 #include <virglrenderer.h>
 #define VIRGL(_g, _virgl, _simple, ...)                     \
@@ -358,6 +360,7 @@ static void virtio_gpu_resource_destroy(VirtIOGPU *g,
                                         struct virtio_gpu_simple_resource *res)
 {
     pixman_image_unref(res->image);
+    virtio_gpu_cleanup_mapping(res);
     QTAILQ_REMOVE(&g->reslist, res, next);
     g_free(res);
 }
-- 
1.8.3.1