Bug 214798 - microcode size check prevents newer microcode from loading
microcode size check prevents newer microcode from loading
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Geoff Gustafson
Brian Brock
: 217956 (view as bug list)
Depends On:
Blocks: 214807
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Reported: 2006-11-09 10:45 EST by Geoff Gustafson
Modified: 2007-11-30 17:07 EST (History)
2 users (show)

See Also:
Fixed In Version: beta2
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2006-12-22 21:21:57 EST
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RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
RHEL5 version of patch to remove microcode size check (1.29 KB, application/octet-stream)
2006-11-09 10:45 EST, Geoff Gustafson
no flags Details

  None (edit)
Description Geoff Gustafson 2006-11-09 10:45:01 EST
Description of problem:
There are a couple size checks in the kernel that require an Intel microcode
package to be at least a default size. A recent microcode update (1.15) is a
smaller size, so this check prevents it from loading.

The patch is upstream here:

Version of patch for RHEL5 attached.

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

How reproducible:

Steps to Reproduce:
1. Install microcode_ctl-1.15 package
2. Try to load microcode "service microcode_ctl start"
3. It fails to load, but works with larger 1.13 package
Comment 1 Geoff Gustafson 2006-11-09 10:45:01 EST
Created attachment 140785 [details]
RHEL5 version of patch to remove microcode size check
Comment 2 Geoff Gustafson 2006-11-09 11:01:53 EST
Without this patch, the updated microcode in 209455 can't be loaded so I'm
setting this as a blocker for that one.
Comment 3 Geoff Gustafson 2006-11-09 11:05:20 EST
Hmm, removing block because that bug was really about microcode_ctl being
started by default, not about updating the data file.
Comment 5 Linda Wang 2006-11-17 11:41:00 EST
patch posted on 11/09/06
Comment 6 RHEL Product and Program Management 2006-11-17 11:44:50 EST
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
Comment 7 Jay Turner 2006-11-20 14:43:59 EST
QE ack for RHEL5.  It does seem that we're losing some sanity checking there, as
I suspect there's still some "minimal" size, but I'm OK with ripping out the
bounds checking.
Comment 8 Linda Wang 2006-11-30 16:39:11 EST
*** Bug 217956 has been marked as a duplicate of this bug. ***
Comment 9 Don Zickus 2006-12-21 15:24:25 EST
in 2.6.18-1.2789.el5
Comment 10 RHEL Product and Program Management 2006-12-22 21:21:57 EST
A package has been built which should help the problem described in 
this bug report. This report is therefore being closed with a resolution 
of CURRENTRELEASE. You may reopen this bug report if the solution does 
not work for you.

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