CVE request Qemu: 9pfs: memory leakage via proxy/handle callbacks

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

  Hello,

Quick Emulator(Qemu) built with the VirtFS, host directory sharing via Plan 9 
File System(9pfs) support, is vulnerable to memory leakage issue. It could 
occur via its '9p-handle' or '9p-proxy' backend drivers as they do not free 
their respective allocated data objects.

A privileged user inside guest could use this flaw to leak host memory, thus 
affecting other services on the host and/or potentially crash the Qemu process 
on the host.

Upstream patches:
-----------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-11/msg03278.html

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