CVE request Qemu: scsi: mptsas: OOB access when freeing MPTSASRequest object

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

  Hello,

Quick emulator(Qemu) built with the LSI SAS1068 Host Bus emulation support, is 
vulnerable to an invalid memory access issue. It could occur while processing 
scsi io requests in mptsas_process_scsi_io_request.

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

Upstream patch
--------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03604.html

Reference:
----------
  -> https://bugzilla.redhat.com/show_bug.cgi?id=1376776

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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