From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 26 Jul 2001 11:42:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 26 Jul 2001 11:41:55 -0400 Received: from ppp0.ocs.com.au ([203.34.97.3]:14605 "HELO mail.ocs.com.au") by vger.kernel.org with SMTP id ; Thu, 26 Jul 2001 11:41:52 -0400 X-Mailer: exmh version 2.1.1 10/15/1999 From: Keith Owens To: "Gerald Walden" cc: linux-kernel@vger.kernel.org Subject: Re: debug of a kernel panic leading nowhere... In-Reply-To: Your message of "Wed, 25 Jul 2001 21:57:18 -0400." <20010726015721Z267509-720+6404@vger.kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Fri, 27 Jul 2001 01:41:38 +1000 Message-ID: <22993.996162098@ocs3.ocs-net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Original-Recipient: rfc822;linux-kernel-outgoing On Wed, 25 Jul 2001 21:57:18 -0400, "Gerald Walden" wrote: >During the rmmod of a fairly simple driver, I get a kernel >panic which crashes the system. I believe I have taken all >the proper steps to attempt to debug the problem to no >avail. >perhaps there is a more appropriate list that I should be >sending this to) would greatly be appreciated. >before <1>Unable to handle kernel paging request at virtual >address 5a5a5a5e That bit pattern indicates an attempt to access storage that has been freed and poisoned by the slab cache. >>>EIP; c482424a <__module_parm_watchdog+4fd2/????> <===== >Trace; c482777b >Trace; c482779d >Trace; c482190f <__module_parm_watchdog+2697/????> >Trace; c4854c20 At the time the oops occurred, the module symbols had already been removed. You need to run ksymoops against ksyms and lsmod data from *before* the rmmod. man insmod, see ksymoops assistance, in particular directory /var/log/ksymoops. Run ksymoops against the symbols saved after the module was loaded.