kern/118897: Kernel Panic acquiring IP address from DHCP server on newly enabled netcard

[Kris Kennaway]

The following reply was made to PR kern/118897; it has been noted by GNATS.

From: Kris Kennaway <kris at FreeBSD.org>
To: Manolis Kiagias <sonicy at otenet.gr>
Cc: freebsd-gnats-submit at FreeBSD.org
Subject: Re: kern/118897: Kernel Panic acquiring IP address from DHCP server
 on	newly enabled netcard
Date: Sat, 29 Dec 2007 12:01:19 +0100

 Manolis Kiagias wrote:
 >> Number:         118897
 >> Category:       kern
 >> Synopsis:       Kernel Panic acquiring IP address from DHCP server on newly enabled netcard
 >> Confidential:   no
 >> Severity:       critical
 >> Priority:       medium
 >> Responsible:    freebsd-bugs
 >> State:          open
 >> Quarter:        
 >> Keywords:       
 >> Date-Required:
 >> Class:          sw-bug
 >> Submitter-Id:   current-users
 >> Arrival-Date:   Thu Dec 20 18:10:02 UTC 2007
 >> Closed-Date:
 >> Last-Modified:
 >> Originator:     Manolis Kiagias
 >> Release:        6.3-RC1
 >> Organization:
 >> Environment:
 > FreeBSD pegasus.dyndns.org 6.3-RC1-p1 FreeBSD 6.3-RC1-p1 #2: Sun Dec  2 19:48:21 EET 2007     root at pegasus.dyndns.org:/usr/obj/usr/src/sys/PEGASUS  i386
 > 
 >> Description:
 > Machine has a broadcom network card shown as bfe0.  At boot, the card is not enabled (commented out) in rc.conf 
 > Driver attaches normally. 
 > After editing rc.conf to enable the line:
 > 
 > ifconfig_bfe0="DHCP"
 > 
 > and running:
 > 
 > /etc/rc.d/netif restart
 > 
 > there is a kernel panic while getting an address from DHCP server (a linksys home router).
 > 
 > panic: page fault
 > fault virtual address = 0x104
 > fault code = supervisor read, page not present
 > instruction pointer = 0x20:0xc052417d
 > stack pointer = 0x28:0xe71ffbec
 > frame pointer = 0x28:0xe71ffbf8
 > code segment = base 0x0 limit 0xfffff type 0x1b
 > =DPL 0, pres 1, def32 1, gran 1
 > =resume, IOPL=0
 > =971 (ifconfig)
 > =12
 >> How-To-Repeat:
 > The symptom is repeatable every time. Use the procedure mentioned above. The symptom does not occur if you reboot after enabling the card in rc.conf. In this case the card is assigned an IP and subsequent runs of netif have no undesirable effects.
 >> Fix:
 > None that I know. Only workaround is to reboot after enabling the rc.conf entry.
 > 
 >> Release-Note:
 >> Audit-Trail:
 >> Unformatted:
 > _______________________________________________
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 > http://lists.freebsd.org/mailman/listinfo/freebsd-bugs
 > To unsubscribe, send any mail to "freebsd-bugs-unsubscribe at freebsd.org"
 > 
 > .
 > 
 
 Thanks for the report, but you need to do some additional work to 
 complete the submission.  Please see:
 
  
 http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html
 
 and obtain a crashdump and backtrace.
 
 Kris