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Bug 335061

Summary: crash mod command does not search the same directories as modutils do
Product: Red Hat Enterprise Linux 4 Reporter: Charlotte Richardson <charlotte.richardson>
Component: crashAssignee: Dave Anderson <anderson>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: 4.5   
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: RHBA-2008-0673 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2008-07-24 19:33:20 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:
Attachments:
Description Flags
patch file none

Description Charlotte Richardson 2007-10-16 18:49:16 UTC 
Description of problem:
Crash does not search for modules in the same order as the modutils (depmod,
modprobe, insmod) do. It should find /lib/modules/<kernel>/updates before
finding /lib/modules/<kernel> files.


Version-Release number of selected component (if applicable):
crash-4.0


How reproducible: every time
Place a loadable module into /lib/modules/<kernel>/updates/... that has the same
name as a standard module and modprobe it in. modinfo will then show it as
coming from the updates directory but mod -s <modulename> or mod -S in crash
will show the module in the standard directory. Crash is doing a "find" command
in /lib/modules/<kernel> and so finds the original file first.


Steps to Reproduce: (see above)
1.
2.
3.
  
Actual results:


Expected results:


Additional info:
See attached path file for fix to kernel.c.
Comment 1 Charlotte Richardson 2007-10-16 18:49:16 UTC 
Created attachment 229141 [details]
patch file
Comment 2 Dave Anderson 2007-10-16 19:12:00 UTC 
Hi Charlotte,

Thanks for carrying this to the patch-submission point, I appreciate
that.

I just spoke with Kimball Murray about this, without knowing that
you had already filed a bugzilla.  Anyway, I suggested to him that
you join the crash-utility mailing list, and that you
post your findings and the patch there.  Could you possibly do
that?  I'll send you an invite now -- you can always quit later.
But it's worth at least keeping it in "digest" mode.

BTW, can you also confirm that this also applies to RHEL5?
I would think it should, but I wasn't even aware of the
existence of the "updates" directory.
Comment 3 Charlotte Richardson 2007-10-16 19:33:13 UTC 
I told Kimball I would submit it when I had a patch ready. I haven't tried RHEL5
yet, but I need to build that soon. I'll update this Bug when I know more.

I joined the mailing list, thanks.

/Charlotte
Comment 4 Dave Anderson 2007-11-20 16:06:33 UTC 
The fix is included in upstream release 4.0-4.9.

From: http://people.redhat.com/anderson/crash.changelog.html

     - Fix for the "mod" command to search for module object files in the
       /lib/modules/<release>/updates directory tree before looking
       in /lib/modules/<release>.  (charlotte.richardson)
Comment 5 RHEL Program Management 2007-11-29 03:56:39 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 6 Dave Anderson 2008-02-01 19:58:43 UTC 
MODIFIED: CVS Tag: crash-4_0-5_0_0
Comment 11 errata-xmlrpc 2008-07-24 19:33:20 UTC 
An advisory 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 therefore 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.

http://rhn.redhat.com/errata/RHBA-2008-0673.html