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Bug 149557

Summary: panic when unmounting stale nfs mount during rhr2 network cert test
Product: Red Hat Enterprise Linux 4 Reporter: Christopher P Johnson <christopher.p.johnson>
Component: kernelAssignee: Steve Dickson <steved>
Status: CLOSED WONTFIX QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 4.0CC: davej, linux-bugs, riel
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-06-20 13:28:13 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: 154907    
Attachments:
Description Flags
test client console output none

Description Christopher P Johnson 2005-02-23 22:46:58 UTC 
Description of problem:

The rhr2 cert network tests perform an nfs mount on the /root/mnt on
the remote client during testing. In the case of bug 146510, failures
are experienced after the nfs test (e.g. connection reset during
ab test or prior to the ssh from the SUT which unmounts the
nfs mount).

The rhr2 network test scripts ifdown the interface under test,
with the outstanding mount still in place on the remote client.

When an attempt is made to force the unmount on the test client,
it sometimes panics (see attached oops).

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

This is vanilla rhel4 fcs with latest cert tests installed.

How reproducible:

Steps to Reproduce:
1. Run rhr2 network test
2. One of the intermediate network tests fail (e.g. ab)
3. Rerun the rhr2 network test (hangs trying to perform the mount)
4. Attempt to manually unmount the /root/mnt directory on the remote
client:

umount -f /root/mnt
umount /root/mnt

  
Actual results:

Panic'd.

Expected results:

Should unmount.

Additional info:
Comment 1 Christopher P Johnson 2005-02-23 22:48:06 UTC 
Created attachment 111358 [details]
test client console output
Comment 4 Jiri Pallich 2012-06-20 13:28:13 UTC 
Thank you for submitting this issue for consideration in Red Hat Enterprise Linux. The release for which you requested us to review is now End of Life. 
Please See https://access.redhat.com/support/policy/updates/errata/

If you would like Red Hat to re-consider your feature request for an active release, please re-open the request via appropriate support channels and provide additional supporting details about the importance of this issue.