Return-path: Received: from charlotte.tuxdriver.com ([70.61.120.58]:55677 "EHLO smtp.tuxdriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750868Ab2GaNPU (ORCPT ); Tue, 31 Jul 2012 09:15:20 -0400 Date: Tue, 31 Jul 2012 09:13:11 -0400 From: "John W. Linville" To: Pedro Francisco Cc: ML linux-wireless , johannes@sipsolutions.net Subject: Re: unloading WiFi modules is usually triggering kernel crash Message-ID: <20120731131311.GA19067@tuxdriver.com> (sfid-20120731_151525_010497_920AD533) References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: Sender: linux-wireless-owner@vger.kernel.org List-ID: On Tue, Jul 31, 2012 at 01:54:52PM +0100, Pedro Francisco wrote: > I've noticed in the past few days a pattern: sometimes nm-applet > starts showing empty bars for the signal strength. > > Running the script: > sudo ifconfig wlan0 down; sleep 1 > sudo rmmod hp_wmi; sudo rmmod iwl3945; sudo rmmod iwlegacy; sudo rmmod > mac80211; sudo rmmod cfg80211 > sleep 2; sudo rmmod rfkill; sync > sudo modprobe rfkill; sudo modprobe cfg80211; sudo modprobe mac80211; > sudo modprobe iwlegacy > sudo modprobe iwl3945; sudo modprobe hp_wmi; sleep 1; sudo ifconfig wlan0 up > > usually triggers a kernel crash. This has happened twice so far. I > tried it now for the third time but it didn't crash. > > Logs (running with slub_debug ): > https://dl.dropbox.com/u/1332655/WiFi-issues/notTainted-cfg80211_mlme_disassoc-WARNING.log > https://dl.dropbox.com/u/1332655/WiFi-issues/alreadyTainted-debug_print_object-WARNING.log > (debug_print_object-WARNING was caused by running the above script > rmmoding things) > https://dl.dropbox.com/u/1332655/WiFi-issues/iw_dev_scan.log > https://dl.dropbox.com/u/1332655/WiFi-issues/gshell-wifiBars_empty.png > > Any ideas on what is going on? Looking at other mails around here it > seems not to be driver specific, at least the cfg80211_mlme_disassoc > part. Looks the same as this one, FWIW... https://bugzilla.redhat.com/show_bug.cgi?id=834158 John -- John W. Linville Someday the world will need a hero, and you linville@tuxdriver.com might be all we have. Be ready.