http://git.qemu.org/?p=qemu.git;a=patch;h=204f01b30975923c64006f8067f0937b91eea68b
this patch is from qemu-git.


From 204f01b30975923c64006f8067f0937b91eea68b Mon Sep 17 00:00:00 2001
From: Li Qiang <liq3ea@gmail.com>
Date: Thu, 29 Dec 2016 04:28:41 -0500
Subject: [PATCH] virtio-gpu: fix memory leak in resource attach backing

In the resource attach backing function, everytime it will
allocate 'res->iov' thus can leading a memory leak. This
patch avoid this.

Signed-off-by: Li Qiang <liq3ea@gmail.com>
Message-id: 1483003721-65360-1-git-send-email-liq3ea@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/display/virtio-gpu.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index 6a26258cac..ca88cf478d 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -714,6 +714,11 @@ virtio_gpu_resource_attach_backing(VirtIOGPU *g,
         return;
     }
 
+    if (res->iov) {
+        cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
+        return;
+    }
+
     ret = virtio_gpu_create_mapping_iov(&ab, cmd, &res->addrs, &res->iov);
     if (ret != 0) {
         cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC;
-- 
2.11.0

