CVE request Virglrenderer: host memory leakage when creating decode context

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

  Hello,

Virgil 3d project, used by Quick Emulator(Qemu) to implement 3D GPU support 
for the virtio GPU, is vulnerable to memory leakage issue. It could occur when 
a guest tries to create decode context via 'VIRTIO_GPU_CMD_CTX_CREATE' 
command.

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

Upstream patch:
---------------
  -> https://cgit.freedesktop.org/virglrenderer/commit/?id=747a293ff6055203e529f083896b823e22523fe7

Reference:
----------
  -> https://bugzilla.redhat.com/show_bug.cgi?id=1415944

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

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