CVE request: Qemu: ui: vnc: avoid floating point exception

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

  Hello,

Qemu emulator built with the VNC display driver support is vulnerable to an 
arithmetic exception flaw. It occurs on the VNC server side while processing 
the 'SetPixleFormat' messages from a client.

A privileged remote client could use this flaw to crash the guest resulting in 
DoS.

Upstream patch:
---------------
  -> http://git.qemu.org/?p=qemu.git;a=commitdiff;h=4c65fed8bdf96780735dbdb92a8b

This issue was discovered by Mr Lian Yihan of 360 Inc.

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