usb/156000: rum(4) Fatal trap 18: integer divide fault while in kernel mode

[PseudoCylon]

The following reply was made to PR usb/156000; it has been noted by GNATS.

From: PseudoCylon <moonlightakkiy at yahoo.ca>
To: Ruan Chunping <rcp at mipang.com>
Cc: bug-followup at freebsd.org
Subject: Re: usb/156000: rum(4) Fatal trap 18: integer divide fault while in kernel mode
Date: Fri, 1 Apr 2011 00:14:27 -0700 (PDT)

 >From: Ruan Chunping <rcp at mipang.com>
 >To: PseudoCylon <moonlightakkiy at yahoo.ca>
 >Cc: bug-followup at freebsd.org; Hans Petter Selasky <hselasky at c2i.net>
 >Sent: Tue, March 29, 2011 7:42:54 AM
 >Subject: Re: usb/156000: rum(4) Fatal trap 18: integer divide fault while in 
 >kernel mode
 >
 >Thanks a lot!
 >
 >
 >Maybe rum(4) has anthor ARP-Reply problem too.
 >
 
 No.
 
 The driver shouldn't panic just because it's received an odd packet, and need to 
 be fixed. Other than that, based on your tcpdump output, the driver is behaving 
 fine.
 
 When the driver is not receiving any arp packet, it isn't sending any, so 
 android phone doesn't work. No driver sends out a packet spontaneously.
 When the driver receives an arp packet, it sends out, so nokia phone works.
 There is nothing wrong from driver's point of view.
 
 It seems routing table hasn't properly been configured, so arp reply packets are 
 sent to default gateway (most likely to em0).
 
 Once the routing table is set up, every thing should work fine.
 http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/network-routing.html
 
 You can set up an AP without bridge. Since you are making subnet, rather not to. 
 But, if you need to use bridge, you need to add 2 or more NICs as I mentioned in 
 previous thread. That's what bridge is for.
 
 >bridge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
 >        ether 72:5f:7d:8a:55:34
 >        inet 192.168.77.1 netmask 0xffffff00 broadcast 192.168.77.255
 >        id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
 >        maxage 20 holdcnt 6 proto rstp maxaddr 100 timeout 1200
 >        root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
 >        member: wlan0 flags=143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
 >                ifmaxaddr 0 port 10 priority 128 path cost 370370
 >>>   member: em0 ..... << you need this
 
 
 AK