CVE request Qemu: net: inifinte loop in imx_fec_do_tx() function

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

  Hello,

Quick Emulator(Qemu) built with the i.MX Fast Ethernet Controller emulator 
support is vulnerable to an infinite loop issue. It could occur while 
processing packets on the transmit queue in 'imx_fec_do_tx'.

A privileged user/process inside guest could use this issue to crash the Qemu 
process on the host leading to DoS.

Upstream patch
--------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg05556.html

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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