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Bug 171715

Summary: nfsd: clear signals before exiting the nfsd() thread
Product: Red Hat Enterprise Linux 4 Reporter: Steve Dickson <steved>
Component: kernelAssignee: Steve Dickson <steved>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 4.0CC: jbaron
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: RHSA-2006-0132 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2006-03-07 20:33:11 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: 168429    
Attachments:
Description Flags
Proposed RHEL4 Patch none

Description Steve Dickson 2005-10-25 15:38:29 UTC 
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.3) Gecko/20041020

Description of problem:
tree f657d0dcc3f3d495fbe359cee2ea35868c10b128
parent d13df84ff7f3f3e26a9643c1d3cbf94cef9b5b59
author NeilBrown <neilb.edu.au> Sun, 17 Apr 2005 05:26:37 -0700
committer Linus Torvalds <torvalds.org> Sun, 17 Apr 2005 05:26:37 -0700

[PATCH] nfsd: clear signals before exiting the nfsd() thread

Fixes the error "RPC: failed to contact portmap (errno -512)." when the server
later tries to unregister from the portmapper.

Signed-off-by: Trond Myklebust <Trond.Myklebust>
Signed-off-by: J. Bruce Fields <bfields.edu>
Signed-off-by: Neil Brown <neilb.edu.au>
Signed-off-by: Andrew Morton <akpm>
Signed-off-by: Linus Torvalds <torvalds>

 nfsd/nfssvc.c |    2 ++
 1 files changed, 2 insertions(+)

Index: fs/nfsd/nfssvc.c
===================================================================
--- 9531a56973381aa48a10fbc7073d1109f380d550/fs/nfsd/nfssvc.c  (mode:100644 sha1:39551657e65659d6d25197beffd952c3715a879d)
+++ f657d0dcc3f3d495fbe359cee2ea35868c10b128/fs/nfsd/nfssvc.c  (mode:100644 sha1:02ded7cfbdcf1261d39c13ab0f01d27a79cc93fd)
@@ -258,6 +258,8 @@
 				break;
 		err = signo;
 	}
+	/* Clear signals before calling lockd_down() and svc_exit_thread() */
+	flush_signals(current);
 
 	lock_kernel();
 
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Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.bring a RHEL4 system down
2.
3.
  

Additional info:
Comment 1 Steve Dickson 2005-10-25 15:41:12 UTC 
Created attachment 120370 [details]
Proposed RHEL4 Patch

-------- Original Message --------
Subject: [RHEL4 Patch] nfsd: clear signals before exiting the nfsd() thread
Date: Mon, 25 Apr 2005 11:50:25 -0400
From: Steve Dickson <SteveD>
Reply-To: rhkernel-list
Organization: Red Hat Inc. Internal News
Newsgroups: rhat.general.rhkernel-list

Here is an upstream patch that was just committed which
causes nfsd to clear it's signal mask before
unregistering with the portmapper. Not doing this
cause the "RPC: failed to contact portmap (errno -512)"
message to be logged when a system is being brought
down.

I've seen this message number of times, but when it
came time to explicitly test this patch I was not able
consistently reproduce the problem. Although I have
not see this problem with the -mm kernel, which does
have this patch....


steved.
Comment 6 Red Hat Bugzilla 2006-03-07 20:33:12 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 the 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/RHSA-2006-0132.html