kern/74930: pf crashes the system (unknown reasons)

[Hugo]

>Number:         74930
>Category:       kern
>Synopsis:       pf crashes the system (unknown reasons)
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Dec 10 21:40:19 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator:     Hugo
>Release:        5.3-STABLE
>Organization:
Celeritystorm
>Environment:
FreeBSD evilreborn 5.3-STABLE FreeBSD 5.3-STABLE #0: Wed Dec  1 20:07:36 WET 2004     klr at evilreborn:/usr/obj/usr/src/sys/evilreborn  i386
      
>Description:
I can't play NeverWinter Nights (internet) with my brother at the same time, or my FreeBSD gateway will freeze (numlock doesn't respond, no panic), needing a cold boot. NeverWinter Nights uses UDP 5120-5121 for communication.

I'm using pf, FreeBSD 5.3-STABLE, the box is a P200 MMX w/ 80MB ram.

>How-To-Repeat:
Play NeverWinter Nights on the internet , using two different hosts on the lan.

Possible causes I can think of:

- I use 'user unknown' directives, to separate nat'ed traffic from the gateway-generated traffic

- nat on $net inet from $lan_mask to any -> ($net) static-port (perhaps the static port directive has something to do with it?)

pass out quick on $net proto udp from ($net) to any port { 5120:5122 } user unknown keep state

(my rule to allow NWN traffic on the firewall)
>Fix:
      
>Release-Note:
>Audit-Trail:
>Unformatted: