Bug 126127 - CAN-2004-0565 Information leak on Linux/ia64
CAN-2004-0565 Information leak on Linux/ia64
Product: Red Hat Enterprise Linux 2.1
Classification: Red Hat
Component: kernel (Show other bugs)
ia64 Linux
medium Severity medium
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Assigned To: Jim Paradis
Brian Brock
: Security
Depends On:
  Show dependency treegraph
Reported: 2004-06-16 08:41 EDT by Mark J. Cox
Modified: 2013-08-05 21:07 EDT (History)
2 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2004-12-13 15:17:15 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Mark J. Cox 2004-06-16 08:41:30 EDT
Linux ia64 kernels have a floating point leak because the context
switch code checks just the psr.mfh bit and doesn't look at who the
FPH owner is.  This allows a malicious program to set the MFH bit and
look at the 
registers of another possibly sensitive process.

Patch available and committed:


CAN-2004-0565 Affects: 2.1AS(ia64) 2.1AW
Comment 1 Jim Paradis 2004-11-29 16:54:31 EST
The referenced patch doesn't seem to exist (possibly merged out of bk or
somesuch).  Got another reference?
Comment 2 Mark J. Cox 2004-11-29 17:07:00 EST
I don't have the exact link to the 2.4 changeset, but here is the 2.6
changeset to help find it.
Comment 3 Jim Paradis 2004-11-29 17:18:45 EST
I found the 2.4 changeset, it's at 
Comment 4 John Flanagan 2004-12-13 15:17:15 EST
An errata has been issued which should help the problem 
described in this bug report. This report is therefore being 
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files, 
please follow the link below. You may reopen this bug report 
if the solution does not work for you.


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