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Bug 1373478 - (CVE-2016-7156) CVE-2016-7156 Qemu: scsi: pvscsi: infintie loop when building SG list
CVE-2016-7156 Qemu: scsi: pvscsi: infintie loop when building SG list
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20160903,reported=2...
: Security
Depends On: 1373480
Blocks: 1365912
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Reported: 2016-09-06 07:44 EDT by Prasad J Pandit
Modified: 2018-07-18 11:00 EDT (History)
36 users (show)

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Description Prasad J Pandit 2016-09-06 07:44:27 EDT 
Quick Emulator(Qemu) built with the VMWARE PVSCSI paravirtual SCSI bus
emulation support is vulnerable to an infinite loop issue. It could occur
while processing an IO request descriptor, building SG list.

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

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg00772.html
Comment 1 Prasad J Pandit 2016-09-06 07:44:33 EDT 
Acknowledgments:

Name: Li Qiang (360.cn Inc.)
Comment 2 Prasad J Pandit 2016-09-06 07:46:08 EDT 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1373480]
Comment 3 Cole Robinson 2016-10-15 19:48:58 EDT 
I think this ended up as

commit 49adc5d3f8c6bb75e55ebfeab109c5c37dea65e8
Author: Prasad J Pandit <pjp@fedoraproject.org>
Date:   Tue Sep 6 02:20:43 2016 +0530

    scsi: pvscsi: limit loop to fetch SG list
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