Bug 25029

Summary: mpd-netgraph crashes when using netmeeting across pptp
Product: Ports & Packages Reporter: Charlie Root <root>
Component: Individual Port(s)Assignee: Archie Cobbs <archie>
Status: Closed FIXED    
Severity: Affects Only Me    
Priority: Normal    
Version: Latest   
Hardware: Any   
OS: Any   

Description Charlie Root 2001-02-12 07:30:01 UTC 
	mpd-netgraph (or something else?) causes the system to reboot when
	a pptp session is used with netmeeting; mpd works 100% during other
	uses, but as soon as it is in a netmeeting session it will reboot 
	the machine within 5 minutes of session start.

Fix: 

Unknown
How-To-Repeat: 
	No other box to test with, but install mpd-netgraph, initiate a vpn
	session and start a netmeeting session. Reboots this machine
	everytime
Comment 1 jeh freebsd_committer freebsd_triage 2001-02-13 03:12:49 UTC 
Responsible Changed
From-To: freebsd-ports->archie

Over to MAINTAINER
Comment 2 tom 2001-04-05 04:58:30 UTC 
    I've seen the same problem on two freebsd 4.2 boxes.  In both cases mpd-netgraph was installed on a clean box.  Bringing up mpd-netgraph was fine, but as soon at a PPTP connection from a Windows98 box was established the box would crash, wait for user input for 15 seconds and then reboot.  Both boxes I used has two network interfaces and were using ipfilter and natd.
Comment 3 Archie Cobbs 2001-04-09 21:03:41 UTC 
Hello,

Can you get a kernel core dump and generate a backtrace?

  http://www.freebsd.org/handbook/kerneldebug.html

Thanks,
-Archie

__________________________________________________________________________
Archie Cobbs     *     Packet Design     *     http://www.packetdesign.com
Comment 4 Archie Cobbs 2001-09-13 06:26:23 UTC 
Hello,

I'm trying to resolve this bug. Does it still happen?

Thanks,
-Archie

__________________________________________________________________________
Archie Cobbs     *     Packet Design     *     http://www.packetdesign.com
Comment 5 Archie Cobbs freebsd_committer freebsd_triage 2001-09-13 21:10:05 UTC 
State Changed
From-To: open->closed

Bug was a result of a misconfiguration. If the kernel routing table 
says that the route to the remote PPTP machine is via the PPTP link, 
then we get an infinite loop and the kernel panics. 

There should probably be infinite loop detection support in netgraph, 
or maybe mpd could try to watch for this condition, etc.