CVE request Qemu: usb: integer overflow in emulated_apdu_from_guest

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

  Hello,

Quick Emulator(Qemu) built with the CCID Card device emulator support is 
vulnerable to an integer overflow flaw. It could occur while passing message 
via command/responses packets to and from the host.

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

Upstream patch:
---------------
  -> https://lists.nongnu.org/archive/html/qemu-devel/2017-02/msg01075.html

Reference:
----------
  -> https://bugzilla.redhat.com/show_bug.cgi?id=1419699

This issue was reported by Mr Li Qiang of 360.cn Inc.

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