Bug 221119 - Missing IOEMU physical address check
Missing IOEMU physical address check
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: xen (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Rik van Riel
Depends On:
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Reported: 2007-01-02 01:09 EST by Herbert Xu
Modified: 2007-11-30 17:07 EST (History)
1 user (show)

See Also:
Fixed In Version: 5.0.0
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2007-01-26 15:09:19 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Herbert Xu 2007-01-02 01:09:14 EST
It seems that we should pull the following changeset into RHEL5 as
otherwise any 32-bit HVM guest can supply an address like 0xffffffff
to write memory outside the mapped area.
Comment 1 Stephen Tweedie 2007-01-03 07:59:15 EST
The actual changeset:

# HG changeset patch
# User Tim Deegan <Tim.Deegan@xensource.com>
# Node ID 2041122e0c4a6df3cfce2691bf83d443dc2f698d
# Parent  66cdabe97205613ec9f3b0462961dbedceb68e27
[HVM] Fix qemu's test for whether physcal addresses are RAM.
HVM guests have a memory hole below 4GB, so can't just check whether
addresses are < the amount of RAM allocated.
Signed-off-by: Tim Deegan <Tim.Deegan@xensource.com>

Comment 3 RHEL Product and Program Management 2007-01-03 09:40:59 EST
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
Comment 4 Rik van Riel 2007-01-03 12:09:39 EST
Herbert posted this patch last night.

Subject: Missing HVM phys memory check
Comment 5 Jay Turner 2007-01-03 15:37:15 EST
QE ack for RHEL5.
Comment 6 Rik van Riel 2007-01-04 13:50:01 EST
in xen-3.0.3-19.el5
Comment 7 Jay Turner 2007-01-26 15:09:19 EST
xen-3.0.3-22.el5 included in 20070125.0.

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