CVE request Qemu: malicious PRDT flow from guest to host

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

  Hello,

Due to inconsistent error checking, Qemu emulator allows malicious PRDT data 
to flow from a guest to the host's IDE or AHCI controllers. This could result 
in infinite loop or memory leakage on the host leading to unbounded resource 
consumption.

A privileged user inside guest could use this flaw to crash the system,
resulting in DoS.

Upstream fix:
-------------
  -> http://git.qemu.org/?p=qemu.git;a=commitdiff;h=3251bdcf1c67427d964517053c3d185b46e618e8

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