From nobody@FreeBSD.org  Mon Jul 20 21:10:45 2009
Return-Path: <nobody@FreeBSD.org>
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 175071065672
	for <freebsd-gnats-submit@FreeBSD.org>; Mon, 20 Jul 2009 21:10:45 +0000 (UTC)
	(envelope-from nobody@FreeBSD.org)
Received: from www.freebsd.org (www.freebsd.org [IPv6:2001:4f8:fff6::21])
	by mx1.freebsd.org (Postfix) with ESMTP id 06F098FC20
	for <freebsd-gnats-submit@FreeBSD.org>; Mon, 20 Jul 2009 21:10:45 +0000 (UTC)
	(envelope-from nobody@FreeBSD.org)
Received: from www.freebsd.org (localhost [127.0.0.1])
	by www.freebsd.org (8.14.3/8.14.3) with ESMTP id n6KLAiso085682
	for <freebsd-gnats-submit@FreeBSD.org>; Mon, 20 Jul 2009 21:10:44 GMT
	(envelope-from nobody@www.freebsd.org)
Received: (from nobody@localhost)
	by www.freebsd.org (8.14.3/8.14.3/Submit) id n6KLAiCT085681;
	Mon, 20 Jul 2009 21:10:44 GMT
	(envelope-from nobody)
Message-Id: <200907202110.n6KLAiCT085681@www.freebsd.org>
Date: Mon, 20 Jul 2009 21:10:44 GMT
From: Rene Ladan <rene@FreeBSD.org>
To: freebsd-gnats-submit@FreeBSD.org
Subject: [lor] wpi0_com_lock / wpi0
X-Send-Pr-Version: www-3.1
X-GNATS-Notify:

>Number:         136943
>Category:       kern
>Synopsis:       [wpi] [lor] wpi0_com_lock / wpi0
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-wireless
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jul 20 21:20:04 UTC 2009
>Closed-Date:    
>Last-Modified:  Mon Apr 11 22:48:03 UTC 2011
>Originator:     Rene Ladan
>Release:        8.0-BETA2 amd64
>Organization:
>Environment:
FreeBSD self.rene-ladan.nl 8.0-BETA2 FreeBSD 8.0-BETA2 #0: Wed Jul 15 21:48:41 UTC 2009     root@mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  amd64

>Description:
lock order reversal:
 1st 0xffffff80002dc018 wpi0_com_lock (wpi0_com_lock) @ /usr/src/sys/modules/wpi/../../dev/wpi/if_wpi.c:1291
 2nd 0xffffff00024c0010 wpi0 (network driver) @ /usr/src/sys/modules/wpi/../../dev/wpi/if_wpi.c:2068
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
_witness_debugger() at _witness_debugger+0x2e
witness_checkorder() at witness_checkorder+0x81e
_mtx_lock_flags() at _mtx_lock_flags+0x78
wpi_raw_xmit() at wpi_raw_xmit+0x7a
ieee80211_send_mgmt() at ieee80211_send_mgmt+0x4d5
sta_newstate() at sta_newstate+0x42e
wpi_newstate() at wpi_newstate+0xee
ieee80211_newstate_cb() at ieee80211_newstate_cb+0xac
taskqueue_run() at taskqueue_run+0x96
taskqueue_thread_loop() at taskqueue_thread_loop+0x3f
fork_exit() at fork_exit+0x12a
fork_trampoline() at fork_trampoline+0xe
--- trap 0, rip = 0, rsp = 0xffffff803c22bd30, rbp = 0 ---
>How-To-Repeat:
GENERIC + if_wpi + wpifw ( + other modules)
wlan0 with WPA2 authentication

>Fix:


>Release-Note:
>Audit-Trail:

From: Rene Ladan <rene@freebsd.org>
To: bug-followup@FreeBSD.org
Cc: bzeeb+freebsd+lor@zabbadoz.net
Subject: Re: kern/136943: [lor] wpi0_com_lock / wpi0
Date: Mon, 20 Jul 2009 23:31:57 +0200

 The same LOR with a different backtrace:
 
 lock order reversal:
  1st 0xffffff80002dc018 wpi0_com_lock (wpi0_com_lock) @
 /usr/src/sys/modules/wpi/../../dev/wpi/if_wpi.c:1291
  2nd 0xffffff00024c0010 wpi0 (network driver) @
 /usr/src/sys/modules/wpi/../../dev/wpi/if_wpi.c:2068
 KDB: stack backtrace:
 db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
 _witness_debugger() at _witness_debugger+0x2e
 witness_checkorder() at witness_checkorder+0x81e
 _mtx_lock_flags() at _mtx_lock_flags+0x78
 wpi_raw_xmit() at wpi_raw_xmit+0x7a
 ieee80211_send_mgmt() at ieee80211_send_mgmt+0x4d5
 sta_newstate() at sta_newstate+0x42e
 wpi_newstate() at wpi_newstate+0xee
 ieee80211_newstate_cb() at ieee80211_newstate_cb+0xac
 taskqueue_run() at taskqueue_run+0x96
 taskqueue_thread_loop() at taskqueue_thread_loop+0x3f
 fork_exit() at fork_exit+0x12a
 fork_trampoline() at fork_trampoline+0xe
 --- trap 0, rip = 0, rsp = 0xffffff803c22bd30, rbp = 0 ---
Responsible-Changed-From-To: freebsd-bugs->freebsd-net 
Responsible-Changed-By: linimon 
Responsible-Changed-When: Sat Jul 25 01:27:46 UTC 2009 
Responsible-Changed-Why:  
Over to maintainer(s). 

http://www.freebsd.org/cgi/query-pr.cgi?pr=136943 
Responsible-Changed-From-To: freebsd-net->freebsd-wireless 
Responsible-Changed-By: gavin 
Responsible-Changed-When: Mon Apr 11 22:46:18 UTC 2011 
Responsible-Changed-Why:  
Over to maintainer(s) 

http://www.freebsd.org/cgi/query-pr.cgi?pr=136943 
>Unformatted:
