CVE request Qemu: dma: rc4030 divide by zero error in set_next_tick

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

  Hello,

Quick Emulator(Qemu) built with the JAZZ RC4030 chipset emulation support is 
vulnerable to a divide by zero issue. It could occur while computing its 
periodic timer's next tick value.

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

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg02577.html

This issue was reported by Huawei Product Security Incident Response Team 
(PSIRT), Huawei Inc.

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