From chris@holly.dyndns.org Thu Mar 25 10:22:45 1999
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Date: Thu, 25 Mar 1999 12:18:37 -0600 (CST)
From: chris@holly.dyndns.org
Reply-To: chris@calldei.com
To: FreeBSD-gnats-submit@freebsd.org
Subject: [Panic] cat /dev/drum causes panic, even as nonroot user
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>Number:         10792
>Category:       kern
>Synopsis:       [Panic] cat /dev/drum causes panic, even as nonroot user
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Mar 25 10:30:00 PST 1999
>Closed-Date:    Sat May 1 12:10:05 PDT 1999
>Last-Modified:  Sat May  1 12:10:37 PDT 1999
>Originator:     Chris Costello
>Release:        FreeBSD 4.0-CURRENT i386
>Organization:
>Environment:

	FreeBSD 4.0-CURRENT, CVSupped March 20.

>Description:

	The operation 'cat /dev/drum' causes the following panic message
	(reproduced after having been written down):

	panic: pbreassignbuf() on non phys bp 0xc1c7b490
	syncing disks... 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30... giving up

>How-To-Repeat:

	As a nonroot user, type 'cat /dev/drum'

>Fix:
	
	A fix is being worked on, and a followup will be sent stating further
	progress.

>Release-Note:
>Audit-Trail:

From: Chris Costello <chris@holly.dyndns.org>
To: freebsd-gnats-submit@freebsd.org
Cc:  
Subject: Re: kern/10792
Date: Thu, 25 Mar 1999 12:32:36 -0600

    I forgot to mention this user must be in the kmem group.
 

From: Chris Costello <chris@holly.dyndns.org>
To: FreeBSD-gnats-submit@FreeBSD.ORG
Cc:  
Subject: Re: kern/10792: [Panic] cat /dev/drum causes panic, even as nonroot user
Date: Thu, 25 Mar 1999 13:10:04 -0600

 On Thu, Mar 25, 1999, chris@holly.dyndns.org wrote:
 > >Description:
 > 
 > 	The operation 'cat /dev/drum' causes the following panic message
 > 	(reproduced after having been written down):
 > 
 > 	panic: pbreassignbuf() on non phys bp 0xc1c7b490
 > 	syncing disks... 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30... giving up
 
    This is not a bug.  It behaves exactly as I would predict from the code.
 In my opinion, unless the nature of pbreassignbuf and/or /dev/drum are to
 be changed, this pr is fit to be closed.
 
State-Changed-From-To: open->closed 
State-Changed-By: steve 
State-Changed-When: Sat May 1 12:10:05 PDT 1999 
State-Changed-Why:  
Closed at originator's request. 
>Unformatted:
