CVE request Qemu: display: virtio-gpu-3d: host memory leakage in virgl_cmd_resource_unref

[P J P <ppandit () redhat com>]

  Hello,

Quick Emulator(Qemu) built with the Virtio GPU Device emulator support is 
vulnerable to a host memory leakage issue. It could occur while processing 
'VIRTIO_GPU_CMD_RESOURCE_UNREF' command.

A guest user/process could use this flaw to leak host memory resulting in DoS.

Upstream patch:
---------------
  -> https://lists.nongnu.org/archive/html/qemu-devel/2017-01/msg04615.html

Reference:
----------
  -> https://bugzilla.redhat.com/show_bug.cgi?id=1418382

This issue was reported by Mr Li Qiang of 360.cn Inc.

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
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