NetBSD Problem Report #43268

From www@NetBSD.org  Thu May  6 11:18:58 2010
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Date: Thu,  6 May 2010 11:18:58 +0000 (UTC)
From: natarajsn@gmail.com
Reply-To: natarajsn@gmail.com
To: gnats-bugs@NetBSD.org
Subject: NetBSD 5.0.2 reboots automatically on  a  'umount /mnt'
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>Number:         43268
>Category:       kern
>Synopsis:       NetBSD 5.0.2 reboots automatically on  a  'umount /mnt'
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          feedback
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu May 06 11:20:00 +0000 2010
>Closed-Date:    
>Last-Modified:  Fri Jan 04 01:05:30 +0000 2013
>Originator:     Nataraj S Narayan
>Release:        5.0.2
>Organization:
Vaaraahi Embedded
>Environment:
NetBSD  5.0.2 NetBSD 5.0.2 (GENERIC) #0: Sat Feb  6 17:53:27 UTC 2010  builds@b7.netbsd.org:/home/builds/ab/netbsd-5-0-2-RELEASE/i386/201002061851Z-obj/home/builds/ab/netbsd-5-0-2-RELEASE/src/sys/arch/i386/compile/GENERIC i386

>Description:
I login as root

switch to bash shell

i mount a smbfs file system on to /mnt using command "mount -t smbfs //192.168.0.20/myshare /mnt

i get a password prompt, on which i enter password

system returns to # prompt

try a cd /mnt , get a 'permission denied'

try a "umount /mnt"

System immediately reboots without warning or wait.


 try to cd /mnt - gave permission denied
<nataraj> when umount /mnt, the system reboots 
<nataraj> shocking! never has it happened on Linux or Freebsd
>How-To-Repeat:

>Fix:

>Release-Note:

>Audit-Trail:
From: Antti Kantee <pooka@cs.hut.fi>
To: gnats-bugs@netbsd.org
Cc: 
Subject: Re: PR/43268
Date: Tue, 11 May 2010 15:22:26 +0300

 Can you apply rev 1.88 of src/sys/fs/smbfs/smbfs_vfsops.c and see if
 that helps?  Or simply try a NetBSD 5.1-RC1 kernel.
 (run "cvs up -j1.87 -j1.88 smbfs_vfsops.c" in src/sys/fs/smbfs)

 If not, please provide more information about what happens.  If necessary,
 "sysctl -w ddb.onpanic=1" and run the problematic commands directly
 from console.

Responsible-Changed-From-To: port-i386-maintainer->kern-bug-people
Responsible-Changed-By: dholland@NetBSD.org
Responsible-Changed-When: Fri, 04 Jan 2013 01:05:30 +0000
Responsible-Changed-Why:
smbfs issue -> kernel, not port-specific


State-Changed-From-To: open->feedback
State-Changed-By: dholland@NetBSD.org
State-Changed-When: Fri, 04 Jan 2013 01:05:30 +0000
State-Changed-Why:
A question was asked, back in 2010.


>Unformatted:

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