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Bug 857286

Summary: Return code of mcelog improperly handled in mcelog.cron
Product: Red Hat Enterprise Linux 6 Reporter: ben
Component: mcelogAssignee: Prarit Bhargava <prarit>
Status: CLOSED DUPLICATE QA Contact: Red Hat Kernel QE team <kernel-qe>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 6.3   
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-09-17 12:38:32 UTC Type: Bug
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
Reverse the 'mcelog supported' check none

Description ben 2012-09-14 03:04:07 UTC
Description of problem:
In '/etc/cron.hourly/mcelog.cron', it looks like the intent is to first check if mcelog is supported and only proceed if so. However, I do not believe the check is being done correctly. The check is:

  # is mcelog supported?
  /usr/sbin/mcelog --supported >& /dev/null
  if [ $? -eq 1 ]; then
         exit 1;
  fi

But according to mcelog(8), 'mcelog --supported' returns 1 if supported and 0 otherwise. So the script continues only if the system does not have processors which support MCE, which seems backwards.


Version-Release number of selected component (if applicable):
mcelog-1.0pre3_20110718-0.14.el6.x86_64


How reproducible:
On a system that does not support MCE, this issue should lead to hourly cron emails containing 'mcelog' errors.


Steps to Reproduce:
1. Verify that the system does not support MCE:
  mcelog --supported ; echo "Supported: $?"
2. Run 'mcelog.cron':
  /etc/cron.hourly/mcelog.cron


Actual results:
Supported: 0
mcelog: Cannot find SMBIOS DMI tables


Expected results:
Supported: 0

Comment 1 ben 2012-09-14 03:06:46 UTC
Created attachment 612709 [details]
Reverse the 'mcelog supported' check

Comment 3 Prarit Bhargava 2012-09-17 12:38:32 UTC

*** This bug has been marked as a duplicate of bug 851406 ***