Bug 729133

Summary: Kernel panic (divide error) when calling clock_gettime
Product: Red Hat Enterprise Linux 5 Reporter: Charlie Brady <charlieb-fedora-bugzilla>
Component: kernelAssignee: Vivek Goyal <vgoyal>
Status: CLOSED WONTFIX QA Contact: Red Hat Kernel QE team <kernel-qe>
Severity: high Docs Contact:
Priority: unspecified    
Version: 5.5CC: a.salwa, charlieb-fedora-bugzilla, dziekon, eteo, jarod, pmatouse, redhat.com, vgoyal, wtogami, yozone
Target Milestone: rcFlags: charlieb-fedora-bugzilla: needinfo-
Target Release: ---   
Hardware: i686   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: 172907 Environment:
Last Closed: 2014-06-02 13:19:57 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
Kernel panic screenshot none

Description Charlie Brady 2011-08-08 19:40:32 UTC 
Created attachment 517292 [details]
Kernel panic screenshot

+++ This bug was initially created as a clone of Bug #172907 +++

Description of problem:
When calling the function clock_gettime() with parameter CLOCK_MONOTONIC, the kernel sometimes crashes, producing the following error
Comment 1 Charlie Brady 2011-08-08 19:44:16 UTC 
Problem appears to have been reported against upstream around 2.6.21:

https://lkml.org/lkml/2007/3/2/20

with a simple patch fixed and committed:

http://marc.info/?l=linux-kernel&m=117210430112543&w=2

Was previsouly reported against Fedora 4 (2.6.14-1.1637_FC4), but was assumed to have been fixed (apparently it just became harder to reproduce):

https://bugzilla.redhat.com/show_bug.cgi?id=172907
Comment 2 Vivek Goyal 2011-08-16 13:47:50 UTC 
Charlie, How reproducible this problem is for you? How do I reproduce it?
Comment 3 Charlie Brady 2011-08-16 15:08:36 UTC 
(In reply to comment #2)

> Charlie, How reproducible this problem is for you? How do I reproduce it?

From our application engineer:

 [our program] calls clock_gettime() every couple of milliseconds and we've 
 seen the bug twice so far this year. Good luck reproducing it.

As you can see in bug 172907, Dave Jones had trouble reproducing it, and therefore thought the problem had been fixed, when in fact it hadn't.

I've tried to reproduce using the program attached to bug 172907 without success. If I find a reproduction scenario I'll let you know.

The patch is simple, has been signed off upstream, and I'm confident it fixes the problem.
Comment 4 RHEL Program Management 2014-03-07 12:50:22 UTC 
This bug/component is not included in scope for RHEL-5.11.0 which is the last RHEL5 minor release. This Bugzilla will soon be CLOSED as WONTFIX (at the end of RHEL5.11 development phase (Apr 22, 2014)). Please contact your account manager or support representative in case you need to escalate this bug.
Comment 5 RHEL Program Management 2014-06-02 13:19:57 UTC 
Thank you for submitting this request for inclusion in Red Hat Enterprise Linux 5. We've carefully evaluated the request, but are unable to include it in RHEL5 stream. If the issue is critical for your business, please provide additional business justification through the appropriate support channels (https://access.redhat.com/site/support).