Bug 214798

Summary: microcode size check prevents newer microcode from loading
Product: Red Hat Enterprise Linux 5 Reporter: Geoff Gustafson <grgustaf>
Component: kernelAssignee: Geoff Gustafson <grgustaf>
Status: CLOSED CURRENTRELEASE QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 5.0CC: dzickus, lwang
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: beta2 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2006-12-23 02:21:57 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 214807    
Attachments:
Description Flags
RHEL5 version of patch to remove microcode size check none

Description Geoff Gustafson 2006-11-09 15:45:01 UTC 
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:
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=bd8e39f9e4c0960541c8c69e1f7cb321574d7c90


Version of patch for RHEL5 attached.

Version-Release number of selected component (if applicable):
kernel-2.6.18-1.2745.el5

How reproducible:
100%

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 15:45:01 UTC 
Created attachment 140785 [details]
RHEL5 version of patch to remove microcode size check
Comment 2 Geoff Gustafson 2006-11-09 16:01:53 UTC 
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 16:05:20 UTC 
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 16:41:00 UTC 
patch posted on 11/09/06
Comment 6 RHEL Program Management 2006-11-17 16:44:50 UTC 
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
release.
Comment 7 Jay Turner 2006-11-20 19:43:59 UTC 
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 21:39:11 UTC 
*** Bug 217956 has been marked as a duplicate of this bug. ***
Comment 9 Don Zickus 2006-12-21 20:24:25 UTC 
in 2.6.18-1.2789.el5
Comment 10 RHEL Program Management 2006-12-23 02:21:57 UTC 
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.