CVE request Qemu: usb: redirector: memory leakage when destroying redirector

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

  Hello,

Quick Emulator(Qemu) built with the USB redirector usb-guest support is 
vulnerable to a memory leakage flaw. It could occur while destroying the USB 
redirector in 'usbredir_handle_destroy'.

A guest user/process could use this issue to leak host memory, resulting in 
DoS for a host.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-11/msg01379.html

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