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Bug 1181267 - vfio-pci: Fix BAR size overflow
Summary: vfio-pci: Fix BAR size overflow
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm
Version: 7.0
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Alex Williamson
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2015-01-12 18:21 UTC by Alex Williamson
Modified: 2015-11-19 04:51 UTC (History)
8 users (show)

Fixed In Version: qemu-kvm-1.5.3-88.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-11-19 04:51:06 UTC
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2015:2213 0 normal SHIPPED_LIVE qemu-kvm bug fix and enhancement update 2015-11-19 08:16:10 UTC

Description Alex Williamson 2015-01-12 18:21:21 UTC
Description of problem:

vfio-pci uses unsigned int for BAR size when mapping them.  These will overflow if the BAR is >= 4GB.

Version-Release number of selected component (if applicable):


How reproducible:
Requires a device with a 4GB or bigger PCI BAR.  Then 100%, I assume.

Steps to Reproduce:
1. Find such a device
2. Attempt to assign it to a guest
3.

Actual results:
Probably doesn't work

Expected results:
Should work


Additional info:
29c6e6df492d81b1843e5dd999171bb84c6effea

Suggest QE does regression testing unless such a card can be procured.

Comment 1 Miroslav Rezanina 2015-05-06 09:07:51 UTC
Fix included in qemu-kvm-1.5.3-88.el7

Comment 4 juzhang 2015-08-03 04:00:16 UTC
According to comment3, set this issue as verified.

Comment 6 errata-xmlrpc 2015-11-19 04:51:06 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-2213.html


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