Bug 66820

Summary: nfs stopped working; kernel NULL pointer dereference
Product: [Retired] Red Hat Linux Reporter: Jean-David Beyer <jdbeyer>
Component: kernelAssignee: Arjan van de Ven <arjanv>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.3CC: bcrl, gary.mansell
Target Milestone: ---   
Target Release: ---   
Hardware: i586   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2002-10-17 15:40:59 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
/var/log/messages data in support of this bug. none

Description Jean-David Beyer 2002-06-17 12:38:35 UTC 
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i586; en-US; rv:0.9.9) Gecko/20020513

Description of problem:
nfs no longer works. I bet if I restart it, it will work, but I have not yet
done this. I have data in /var/log/messages about this. I can ping the "failed"
machine from the other one on my LAN, but df does not see the failed machine.

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


How reproducible:
Didn't try

Steps to Reproduce:
1
2.
3.
	

Additional info:

Everyday at a little after 1AM, my other machine runs (under cron) a backup of
the two machines on my LAN. This morning, the backup failed to pick up anything
on this machine, complaining that it could not stat the files on this machine (I
run BRU).

The complaints are in /var/log/messages (to be attached).

I suppose it is remotely possible that this is a hardware problem, but I have
not seen one on this machine in several years, and that one was fixed by
replacing the cache in about 1998.
Comment 1 Jean-David Beyer 2002-06-17 12:39:58 UTC 
Created attachment 61165 [details]
/var/log/messages data in support of this bug.
Comment 2 Jean-David Beyer 2002-06-17 13:07:33 UTC 
kernel on this machine is: 
touchl:jdbeyer[~]$ rpm -q kernel
kernel-2.4.18-3
kernel-2.4.18-4
touchl:jdbeyer[~]$ uname -r
2.4.18-4

I tried to do /etc/rc.d/init.d/nfs restart and it did not work; trouble shutting
down the nfsd processes, it seemed. I could not get rid of them with kill -9
(they got into the D state), so I rebooted the machine.
Comment 3 Gary Mansell 2002-10-17 15:40:53 UTC 
I have found the same problem on a production Redhat Linux 7.3 server running
2.4.18e5 kernel

The messages file output is the same

It is imperative that this gets fixed as this is crashing my production server
which supports 100 various UNIX clients.

Gary Mansell
Comment 4 Arjan van de Ven 2002-10-17 15:47:05 UTC 
this is assumed to be fixed in the 2.4.18-17.7.x erratum kernel
Comment 5 Gary Mansell 2002-10-18 12:54:45 UTC 
I understand that the bug is fixed now.

In which case, how can I find more about what was wrong so that I can perhaps
minimise the impact of the bug on my system until I can upgrade the kernel?

Regards

Gary Mansell
Comment 6 Arjan van de Ven 2002-10-18 13:07:42 UTC 
Well there are quite a few code changes.
If you want those you end up with a new kernel anyway...