CVE Request Qemu: virtio: infinite loop in virtqueue_pop

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

  Hello,

Quick emulator(Qemu) built with the virtio framework is vulnerable to an 
infinite loop issue. It could occur if the guest was to set the I/O descriptor 
buffer length to be zero. A privileged user inside guest could use this flaw 
to potentially crash the Qemu instance on the host resulting in DoS.

Upstream fix:
-------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-07/msg06246.html

This issue was discovered by Li Qiang of 360.cn Inc.

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