i386/160296: 802.11 usb device reboots system on 'ifconfig wlan0 up scan'

[Bob Schafer]

>Number:         160296
>Category:       i386
>Synopsis:       802.11 usb device reboots system on 'ifconfig wlan0 up scan'
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Aug 29 19:50:07 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Bob Schafer
>Release:        8.2-RELEASE-p2
>Organization:
>Environment:
FreeBSD jasintha.sonicpond.com 8.2-RELEASE-p2 FreeBSD 8.2-RELEASE-p2 #0: Sat Aug 27 16:29:00 EDT 2011     root at jasintha.sonicpond.com:/usr/src/sys/i386/compile/JASINTHA  i386
>Description:
Belkin F5D7050 is a usb device with 802.11g capability and is referenced in the FreeBSD hardware notes as an acceptable wireless device which uses the zyd device driver.

dmesg shows:

zyd0: <Belkin USB2.0 WLAN, rev 2.00/48.10, addr 2> on usbus2

upon insertion, device is recognized as zyd0

"ifconfig wlan0 create wlandev zyd0" creates wlan0 as expected

"ifconfig wlan0 up scan" causes system to immediately reboot. no panic message seen. no entry in /var/log/messages.
>How-To-Repeat:
1. plug in Belkin F5D7050
2. ifconfig wlan0 create wlandev zyd0
3. ifconfig wlan0 up scan
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: