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Date: Wed, 12 Apr 2000 15:42:46 -0700 (PDT)
From: jacobsm@gate.net
To: freebsd-gnats-submit@FreeBSD.org
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Subject: kern/17961: Fatal Trap 12. Page fault while in kernel mode
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>Number:         17961
>Category:       kern
>Synopsis:       Fatal Trap 12. Page fault while in kernel mode
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Apr 12 15:50:01 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     Mark Jacobs
>Release:        4.0 Stable
>Organization:
NA
>Environment:
FreeBSD primary.jacobs.org 4.0-STABLE FreeBSD 4.0-STABLE #0 Wed Apr 12 17:20:32
EDT 2000          root@primary.jacobsm.org;/usr/src/sys/compile/MAIN   i386

>Description:
Running coldsync 1.1.7 with Handspring Visor causes Fatal Trap 12 and
system reboots.
 
Kernel debug shows pagefault in /dev/usb/ugen.c:1216
   switch (sce->edesc->bmAttributes & US_XFERTYPE) {

print s
$1 = 0
print sce
$2 = (struct ugen_endpoint *) 0x4008c840
print sce->edesc
Cannot access memory at address 0x4008c844


>How-To-Repeat:
Attach Visor Cradle to USB port, press hotsync button.
Run coldsync -p /dev/ugen0
Press hotsync button again
kernel panic, reboot
>Fix:


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


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