CVE request: Qemu: 9pfs: host memory leakage in v9fs_read

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

  Hello,

Quick Emulator(Qemu) built with the virtio-9p back-end support is vulnerable 
to a memory leakage issue. It could occur while doing a I/O read operation in 
v9fs_read() routine.

A privileged user/process inside guest could use this flaw to crash the Qemu 
process instance resulting in Dos.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg07127.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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