CVE request Qemu: serial: host memory leakage in 16550A UART emulation

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

  Hello,

Quick Emulator(Qemu) built with the 16550A UART serial device emulation 
support is vulnerable to a memory leakage issue. It could occur while doing a 
device unplug operation; Doing so repeatedly would result in leaking host 
memory, affecting other services on the host.

A privileged user inside guest could use this flaw to cause a DoS and/or 
potentially crash the Qemu process on the host.

Upstream patch:
---------------
  -> https://lists.nongnu.org/archive/html/qemu-devel/2017-01/msg01945.html

Reference:
----------
  -> https://bugzilla.redhat.com/show_bug.cgi?id=1416157

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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