From owner-freebsd-current@FreeBSD.ORG  Thu Dec 16 08:06:04 2004
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 1BDE816A4CE
	for <current@freebsd.org>; Thu, 16 Dec 2004 08:06:04 +0000 (GMT)
Received: from www.mmlab.cse.yzu.edu.tw (www.mmlab.cse.yzu.edu.tw
	[140.138.150.166])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 97BE343D45
	for <current@freebsd.org>; Thu, 16 Dec 2004 08:06:03 +0000 (GMT)
	(envelope-from avatar@mmlab.cse.yzu.edu.tw)
Received: by www.mmlab.cse.yzu.edu.tw (qmail, from userid 1000)
	id 44BB44EFD45; Thu, 16 Dec 2004 16:06:01 +0800 (CST)
Received: from localhost (localhost [127.0.0.1])
	by www.mmlab.cse.yzu.edu.tw (qmail) with ESMTP id 42D3E4EFD18
	for <current@freebsd.org>; Thu, 16 Dec 2004 16:06:01 +0800 (CST)
Date: Thu, 16 Dec 2004 16:06:01 +0800 (CST)
From: Tai-hwa Liang <avatar@mmlab.cse.yzu.edu.tw>
To: current@freebsd.org
Message-ID: <0412161600456.50987@www.mmlab.cse.yzu.edu.tw>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Subject: [net80211] if_wi crashed in adhoc mode
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 16 Dec 2004 08:06:04 -0000

Thinkpad R40, builtin Prism2.5 WLAN mini PCI module. -CURRENT cvsup'ed
on Dec-14-2004. SCHED_4BSD, without PREEMPTION. The crash never happened
before recent net80211 update.

Steps to reproduce:

 	ifconfig wi0 10.0.0.1 ssid ibsstest channel 3 mediaopt adhoc up
 	#
 	# if the kernel does not panic, proceed with following steps
 	#
 	wicontrol -L	# disaply IBSS information, join the IBSS
 	ping 10.0.0.3	# send something to the IBSS creator
 	#
 	# the kernel should panic after a couple of sendings
 	#

Fatal trap 12: page fault while in kernel mode
fault virtual address	= 0x20
fault code		= supervisor write, page not present
instruction pointer	= 0x8:0xc04c9a22
stack pointer		= 0x10:0xcba8cc18
.
.
.
[thread pid 21 tid 100018 ]
Stopped at	_mtx_lock_flags+0x12:	cmpxchgl	%edx,0x1c(%ecx)
db> where
Tracing pid 21 tid 100018 td 0xc10fec00
_mtx_lock_flags(4,0,c0743a71,42b,c13e0430) at _mtx_lock_flags+0x12
ieee80211_find_rxnode(c120b24,c13e0430,c120b254,8001,c1102d80) at ieee80211_find_rxnode+0x43
wi_intr(c120b000,c10fec00,0,0,c1101dc8) at wi_intr+0xdae
ithread_loop
fork_exit
fork_trampoline
db> show reg
cs	0x8
ds	0x10
es	0xc05e0010	atpic_disable_source+0xb8
fs	0xcba80018
ss	0x10
eax	0xf
ecx	0x4
edx	0xc10fec00
ebx	0
esp	0xcba8cc18
ebp	0xcba8cc18
esi	0x4
edi	0xc13e0430
eip	0xc04c9a22	_mtx_lock_flags+0x12
efl	0x10246
dr0	0
dr1	0
dr2	0
dr3	0
dr4	0xffff0ff0
dr5	0x400
dr6	0xffff0ff0
dr7	0x400