CVE-2016-4453 Qemu: display: vmsvga: infinite loop in vmsvga_fifo_run() routine

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

  Hello,

Quick Emulator(Qemu) built with the VMware-SVGA "chipset" emulation support is 
vulnerable to an infinite loop issue. It could occur while processing VGA 
commands via its FIFO buffer.

A privileged user inside guest could use this flaw to crash the Qemu process 
resulting in DoS.

Upstream patch
--------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg05270.html

Reference:
----------
  -> https://bugzilla.redhat.com/show_bug.cgi?id=1336650

This issue was discovered and reported by Li Qiang of 360.cn Inc. 
CVE-2016-4453 is assigned by Red Hat Inc.

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