linux-kernel - Re: kernel BUG in iwl-agn-rs.c:2076, WAS: iwlagn + some accesspoint == hardlock

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1274138381.2091.4864.camel@rchatre-DESK>
Date:	Mon, 17 May 2010 16:19:41 -0700
From:	reinette chatre <reinette.chatre@...el.com>
To:	Nils Radtke <lkml@...nk-Future.de>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: kernel BUG in iwl-agn-rs.c:2076, WAS: iwlagn + some
 accesspoint == hardlock

Hi Nils,

On Thu, 2010-05-13 at 08:05 -0700, Nils Radtke wrote:
> Attached the output from the debug-enabled in-tree iwlwifi driver connects.

To keep track, this is 2.6.33.3.

> 
> The order of trial is: site A first, then site B. The sites have thus been visited 
> in the same order as last time and the commands executed have been equally the
> same. The failures evenly.. All the log entries that caught my eye last time
> can be found in the attached one also. I'm sending it bz2 compressed. My uplink
> is a poor man's volume limited UMTS one.

Thank you very much.

So from what I can tell (to summarize your previous emails) there are
three issues:

1) Error messages like: 
iwlagn 0000:03:00.0: expected_tpt should have been calculated by now

2) Frequent deaths with code like:
eth1: deauthenticated from 00:40:96:aa:aa:aa (Reason: 2)

3) Error as follows:
[ 4148.141064] iwlagn 0000:03:00.0: TX Power requested while scanning!
[ 4148.141070] iwlagn 0000:03:00.0: Error sending TX power (-11)

To address (1), could you please run with attached debug patch and also
enable rate scaling debugging. That will be "modprobe iwlagn
debug=0x143fff).

Regarding (2): This is a common issue in busy environments where AP
decides to deathenticate station after it does not receive an ack for
data sent after a few retries. Was this test done in busy environment?

Regarding (3): Seems like driver is getting a request to scan after a
request to remove interface. I am still inquiring about this.

Reinette

View attachment "debug.patch" of type "text/x-patch" (1673 bytes)