i386/104349: Panic while uploading data via bfe network interface

[Constantin]

>Number:         104349
>Category:       i386
>Synopsis:       Panic while uploading data via bfe network interface
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Oct 12 14:40:27 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Constantin
>Release:        6.1-R-p7
>Organization:
>Environment:
FreeBSD c2.home 6.1-RELEASE-p7 FreeBSD 6.1-RELEASE-p7 #0: Mon Oct  9 17:13:03 MSD 2006     cache at c2.home:/usr/obj/usr/src/sys/CACHE  i386

>Description:
System going to reboot sometimes while I print some PDF from linux-acroread or xpdf to network printer (Ricoh Aficio 1515, 2016). Also panic was observed once or twice while uploading some files (not very big, 400-600kB or so) to remote internet server or trying to print pictures. When I print or upload the same file, panic repeated (I try 2-3 times). Almost always after panic a few files on / or /usr was damaged, fsck won't doing background preen.

System - Dell Inspiron 8600C.
1.25Gb memory, 120Gb hard (not full).
--- df output ---
/dev/ad0s1a    253678   181692   51692    78%    /
devfs               1        1       0   100%    /dev
/dev/ad0s1d  28186290 24846442 1084946    96%    /usr
/dev/ad0s2   10490444  6805460 3684984    65%    /mnt/win
/dev/ad0s3   75246176 70277216 4968960    93%    /mnt/data
linprocfs           4        4       0   100%    /usr/compat/linux/proc
--- end of output ---

Two network adapters, Intel 2100 (ipw0) and BCM4401 (bfe0).
Panic was observed only on BCM4401 yet.

I have no many skills on FreeBSD, but I ready to do anything, what help to determine problem.

>How-To-Repeat:

>Fix:

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