kern/126980: ipfw hangs system

[kerbzo at gmail.com]

>Number:         126980
>Category:       kern
>Synopsis:       ipfw hangs system
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Aug 30 18:00:04 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     tinotom
>Release:        FreeBSD 7.1-PRERELEASE i386
>Organization:
none
>Environment:
System: FreeBSD stone.it 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE #0: Sat Aug 30 17:43:32 CEST 2008 tinotom at stone.it:/usr/src/sys/i386/compile/STONE i386


>Description:

This line hangs system:

                ipfw add deny all from any to any not via tun1 uid muva

                where: muva is a valid account username and tun1 is the device created by ppp

                the system hangs even if tun1 doesn't exist

                The same line worked perfectly until my last build of 7-STABLE on early July 2008

>How-To-Repeat:
just run as root:
		ipfw add deny all from any to any not via tun1 uid muva
>Fix:
	none
>Release-Note:
>Audit-Trail:
>Unformatted: