Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754126Ab3JVPOX (ORCPT ); Tue, 22 Oct 2013 11:14:23 -0400 Received: from services.gouders.net ([141.101.32.176]:48037 "EHLO services.gouders.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752735Ab3JVPOV (ORCPT ); Tue, 22 Oct 2013 11:14:21 -0400 From: Dirk Gouders To: Simon Wunderlich Cc: Simon Wunderlich , Mathias Kretschmer , Johannes Berg , Linux Kernel , sw@simonwunderlich.de Subject: Re: [BUG bisected] WARNING: CPU: 0 PID: 1550 at net/wireless/chan.c:373 cfg80211_chandef_usable+0x30/0x15f() In-Reply-To: <20131022132303.GA14762@pandem0nium> (Simon Wunderlich's message of "Tue, 22 Oct 2013 15:23:03 +0200") References: <20131022132303.GA14762@pandem0nium> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.4 (gnu/linux) Date: Tue, 22 Oct 2013 17:14:20 +0200 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 16539 Lines: 287 Sorry for the noise, Simon, here is the reply to _all_ recipients: Simon Wunderlich writes: > Hey Dirk, > > thanks a lot for your report. I have looked at your trace and the patch > again, but so far I'm not sure where the problem comes from. Could you > please help by providing: > > * your wpa_supplicant config (censor your passwords!) - I guess you have > some ad-hoc networks configured? Hi Simon, thanks for your quick response. No need for censorship, I did some quick tests and stripped down my wpa_supplicant.conf to a single entry. With this configuration I get a lot of traces: ctrl_interface=/var/run/wpa_supplicant eapol_version=1 ap_scan=1 fast_reauth=1 network={ frequency=2412 group=TKIP key_mgmt=NONE mode=1 pairwise=NONE ssid="Nokia_n9" } I will also attach a dmesg output of my tests. > * your wpa_supplicant command line parameters when running It is running with a wpa_cli like this: /usr/sbin/wpa_supplicant -c /etc/wpa_supplicant/wpa_supplicant.conf \ -W -B -i wlp4s0 -P /var/run/wpa_supplicant-wlp4s0.pid /usr/bin/wpa_cli -a /etc/wpa_supplicant/wpa_cli.sh \ -p /var/run/wpa_supplicant -i wlp4s0 -P /var/run/wpa_cli-wlp4s0.pid -B > * environment infos - are there IBSS networks next to your notebook? Here at home (where rabbit and hedgehog say good night to each other ;-) I get no scan results -- except when I am using WiFi Hotspot on my Nokia N9 what I use the entry in the above config for. In the office where we have Wi-Fi networks, I have to comment out matching config entries to get the traces. I hope that answers your question -- I am not very fluent in Wi-Fi terminology. > From what I've seen so far: > > * the following warning in cfg80211_chandef_usable() fails: > > if (WARN_ON(!cfg80211_chandef_valid(chandef))) > > * cfg80211_chandef_usable() is most probably called by > cfg80211_reg_can_beacon(), which is called from __ieee80211_sta_join_ibss() > * the worker appearently creates the IBSS network using ifibss->chandef, > which appearently turns out to be invalid. > * ifibss->chandef gets initialized from in ieee80211_ibss_join() from the upper > level parameters and is not changed later. > * at least nl80211 calls reg_can_bacon() as well and checks the chandef before > proceeding. wext looks ok too. > > Therefore I'm not sure how the chandef gets broken ... I wished I could simply try to revert commit 3aede78aad2a7e to see if it indeed is responsible but a simple revert failed. If you want me to, I could try to do that manually or whatever you might think helps to ensure that we look at the proper commit. Thanks, Dirk [ 257.446207] brcmsmac bcma0:0: brcms_ops_bss_info_changed: qos enabled: false (implement) [ 257.446219] brcmsmac bcma0:0: brcms_ops_config: change power-save mode: false (implement) [ 257.446365] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready [ 325.100295] brcmsmac bcma0:0: brcms_ops_bss_info_changed: qos enabled: false (implement) [ 325.100308] brcmsmac bcma0:0: brcms_ops_config: change power-save mode: false (implement) [ 325.100452] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready [ 326.267812] brcmsmac bcma0:0: brcms_ops_bss_info_changed: qos enabled: true (implement) [ 326.267824] brcmsmac bcma0:0: brcms_ops_config: change power-save mode: false (implement) [ 326.268005] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready [ 326.268244] wlp4s0: Trigger new scan to find an IBSS to join [ 328.163335] brcmsmac bcma0:0: brcms_ops_bss_info_changed: Beacon enabled: false [ 328.163349] brcmsmac bcma0:0: brcms_ops_bss_info_changed: IBSS joined: false (implement) [ 330.778227] wlp4s0: Trigger new scan to find an IBSS to join [ 333.792921] wlp4s0: Trigger new scan to find an IBSS to join [ 336.791637] wlp4s0: Trigger new scan to find an IBSS to join [ 337.409105] wlp4s0: Creating new IBSS network, BSSID 9e:71:4a:12:ac:57 [ 337.409112] ------------[ cut here ]------------ [ 337.409124] WARNING: CPU: 0 PID: 1549 at net/wireless/chan.c:373 cfg80211_chandef_usable+0x30/0x15f() [ 337.409126] Modules linked in: option usb_wwan brcmsmac cordic brcmutil bcma [ 337.409143] CPU: 0 PID: 1549 Comm: kworker/u4:5 Not tainted 3.12.0-rc6+ #20 [ 337.409145] Hardware name: LENOVO 08946MG/MoutCook, BIOS 33CN14WW 05/10/2010 [ 337.409155] Workqueue: phy0 ieee80211_iface_work [ 337.409159] 0000000000000000 0000000000000009 ffffffff8161e3c7 0000000000000000 [ 337.409164] ffffffff81068b00 ffff88006dd607c0 ffffffff815e79e4 0000000000000000 [ 337.409168] 000000000000000f ffff88006fc63dc2 ffff88006fc63d50 ffff88006fe1e200 [ 337.409174] Call Trace: [ 337.409185] [] ? dump_stack+0x50/0x80 [ 337.409193] [] ? warn_slowpath_common+0x73/0x8b [ 337.409198] [] ? cfg80211_chandef_usable+0x30/0x15f [ 337.409202] [] ? cfg80211_chandef_usable+0x30/0x15f [ 337.409207] [] ? __ieee80211_sta_join_ibss+0x162/0x6e2 [ 337.409213] [] ? printk+0x4f/0x54 [ 337.409218] [] ? ieee80211_sta_create_ibss+0xc8/0xce [ 337.409223] [] ? ieee80211_ibss_work+0x255/0x3c5 [ 337.409230] [] ? process_one_work+0x1c7/0x2e6 [ 337.409236] [] ? pwq_activate_delayed_work+0x1e/0x28 [ 337.409241] [] ? worker_thread+0x1cb/0x2c4 [ 337.409246] [] ? rescuer_thread+0x25c/0x25c [ 337.409252] [] ? kthread+0xad/0xb5 [ 337.409264] [] ? kthread_create_on_node+0xc1/0x115 [ 337.409271] [] ? kthread_freezable_should_stop+0x3b/0x3b [ 337.409284] [] ? ret_from_fork+0x7c/0xb0 [ 337.409292] [] ? kthread_freezable_should_stop+0x3b/0x3b [ 337.409297] ---[ end trace 8c9c4e19c81db3fc ]--- [ 337.409301] wlp4s0: Failed to join IBSS, beacons forbidden [ 340.018245] brcmsmac bcma0:0: brcms_ops_bss_info_changed: Beacon enabled: false [ 340.018256] brcmsmac bcma0:0: brcms_ops_bss_info_changed: IBSS joined: false (implement) [ 342.773061] wlp4s0: Trigger new scan to find an IBSS to join [ 345.787767] wlp4s0: Trigger new scan to find an IBSS to join [ 348.786469] wlp4s0: Trigger new scan to find an IBSS to join [ 349.403920] wlp4s0: Creating new IBSS network, BSSID 3a:7b:c4:91:7f:7f [ 349.403927] ------------[ cut here ]------------ [ 349.403939] WARNING: CPU: 0 PID: 1550 at net/wireless/chan.c:373 cfg80211_chandef_usable+0x30/0x15f() [ 349.403941] Modules linked in: option usb_wwan brcmsmac cordic brcmutil bcma [ 349.403956] CPU: 0 PID: 1550 Comm: kworker/u4:6 Tainted: G W 3.12.0-rc6+ #20 [ 349.403958] Hardware name: LENOVO 08946MG/MoutCook, BIOS 33CN14WW 05/10/2010 [ 349.403965] Workqueue: phy0 ieee80211_iface_work [ 349.403968] 0000000000000000 0000000000000009 ffffffff8161e3c7 0000000000000000 [ 349.403973] ffffffff81068b00 ffff88006dd607c0 ffffffff815e79e4 0000000000000000 [ 349.403978] 000000000000000f ffff88006fc43dc2 ffff88006fc43d50 ffff88006fe1e200 [ 349.403983] Call Trace: [ 349.403995] [] ? dump_stack+0x50/0x80 [ 349.404003] [] ? warn_slowpath_common+0x73/0x8b [ 349.404007] [] ? cfg80211_chandef_usable+0x30/0x15f [ 349.404011] [] ? cfg80211_chandef_usable+0x30/0x15f [ 349.404016] [] ? __ieee80211_sta_join_ibss+0x162/0x6e2 [ 349.404022] [] ? printk+0x4f/0x54 [ 349.404027] [] ? ieee80211_sta_create_ibss+0xc8/0xce [ 349.404032] [] ? ieee80211_ibss_work+0x255/0x3c5 [ 349.404039] [] ? process_one_work+0x1c7/0x2e6 [ 349.404045] [] ? pwq_activate_delayed_work+0x1e/0x28 [ 349.404050] [] ? worker_thread+0x1cb/0x2c4 [ 349.404055] [] ? rescuer_thread+0x25c/0x25c [ 349.404060] [] ? kthread+0xad/0xb5 [ 349.404065] [] ? kthread_create_on_node+0xc1/0x115 [ 349.404070] [] ? kthread_freezable_should_stop+0x3b/0x3b [ 349.404076] [] ? ret_from_fork+0x7c/0xb0 [ 349.404081] [] ? kthread_freezable_should_stop+0x3b/0x3b [ 349.404084] ---[ end trace 8c9c4e19c81db3fd ]--- [ 349.404087] wlp4s0: Failed to join IBSS, beacons forbidden [ 351.877102] brcmsmac bcma0:0: brcms_ops_bss_info_changed: Beacon enabled: false [ 351.877112] brcmsmac bcma0:0: brcms_ops_bss_info_changed: IBSS joined: false (implement) [ 355.767433] wlp4s0: Trigger new scan to find an IBSS to join [ 358.782189] wlp4s0: Trigger new scan to find an IBSS to join [ 359.399618] wlp4s0: Creating new IBSS network, BSSID 66:8d:31:ac:40:2a [ 359.399626] ------------[ cut here ]------------ [ 359.399638] WARNING: CPU: 1 PID: 1549 at net/wireless/chan.c:373 cfg80211_chandef_usable+0x30/0x15f() [ 359.399640] Modules linked in: option usb_wwan brcmsmac cordic brcmutil bcma [ 359.399656] CPU: 1 PID: 1549 Comm: kworker/u4:5 Tainted: G W 3.12.0-rc6+ #20 [ 359.399658] Hardware name: LENOVO 08946MG/MoutCook, BIOS 33CN14WW 05/10/2010 [ 359.399664] Workqueue: phy0 ieee80211_iface_work [ 359.399667] 0000000000000000 0000000000000009 ffffffff8161e3c7 0000000000000000 [ 359.399672] ffffffff81068b00 ffff88006dd607c0 ffffffff815e79e4 0000000000000000 [ 359.399677] 000000000000000f ffff88006fc63dc2 ffff88006fc63d50 ffff88006fe1e200 [ 359.399683] Call Trace: [ 359.399694] [] ? dump_stack+0x50/0x80 [ 359.399702] [] ? warn_slowpath_common+0x73/0x8b [ 359.399706] [] ? cfg80211_chandef_usable+0x30/0x15f [ 359.399711] [] ? cfg80211_chandef_usable+0x30/0x15f [ 359.399716] [] ? __ieee80211_sta_join_ibss+0x162/0x6e2 [ 359.399721] [] ? printk+0x4f/0x54 [ 359.399727] [] ? ieee80211_sta_create_ibss+0xc8/0xce [ 359.399731] [] ? ieee80211_ibss_work+0x255/0x3c5 [ 359.399739] [] ? process_one_work+0x1c7/0x2e6 [ 359.399744] [] ? pwq_activate_delayed_work+0x1e/0x28 [ 359.399749] [] ? worker_thread+0x1cb/0x2c4 [ 359.399754] [] ? rescuer_thread+0x25c/0x25c [ 359.399760] [] ? kthread+0xad/0xb5 [ 359.399764] [] ? kthread_create_on_node+0xc1/0x115 [ 359.399769] [] ? kthread_freezable_should_stop+0x3b/0x3b [ 359.399776] [] ? ret_from_fork+0x7c/0xb0 [ 359.399780] [] ? kthread_freezable_should_stop+0x3b/0x3b [ 359.399784] ---[ end trace 8c9c4e19c81db3fe ]--- [ 359.399786] wlp4s0: Failed to join IBSS, beacons forbidden [ 361.764903] wlp4s0: Trigger new scan to find an IBSS to join [ 362.382331] wlp4s0: Creating new IBSS network, BSSID 42:b3:7c:d2:ed:eb [ 362.382337] ------------[ cut here ]------------ [ 362.382346] WARNING: CPU: 0 PID: 1550 at net/wireless/chan.c:373 cfg80211_chandef_usable+0x30/0x15f() [ 362.382348] Modules linked in: option usb_wwan brcmsmac cordic brcmutil bcma [ 362.382363] CPU: 0 PID: 1550 Comm: kworker/u4:6 Tainted: G W 3.12.0-rc6+ #20 [ 362.382365] Hardware name: LENOVO 08946MG/MoutCook, BIOS 33CN14WW 05/10/2010 [ 362.382371] Workqueue: phy0 ieee80211_iface_work [ 362.382373] 0000000000000000 0000000000000009 ffffffff8161e3c7 0000000000000000 [ 362.382378] ffffffff81068b00 ffff88006dd607c0 ffffffff815e79e4 0000000000000000 [ 362.382383] 000000000000000f ffff88006fc43dc2 ffff88006fc43d50 ffff88006fe1e200 [ 362.382388] Call Trace: [ 362.382397] [] ? dump_stack+0x50/0x80 [ 362.382403] [] ? warn_slowpath_common+0x73/0x8b [ 362.382408] [] ? cfg80211_chandef_usable+0x30/0x15f [ 362.382412] [] ? cfg80211_chandef_usable+0x30/0x15f [ 362.382417] [] ? __ieee80211_sta_join_ibss+0x162/0x6e2 [ 362.382422] [] ? printk+0x4f/0x54 [ 362.382427] [] ? ieee80211_sta_create_ibss+0xc8/0xce [ 362.382432] [] ? ieee80211_ibss_work+0x255/0x3c5 [ 362.382438] [] ? process_one_work+0x1c7/0x2e6 [ 362.382443] [] ? pwq_activate_delayed_work+0x1e/0x28 [ 362.382448] [] ? worker_thread+0x1cb/0x2c4 [ 362.382453] [] ? rescuer_thread+0x25c/0x25c [ 362.382458] [] ? kthread+0xad/0xb5 [ 362.382462] [] ? kthread_create_on_node+0xc1/0x115 [ 362.382467] [] ? kthread_freezable_should_stop+0x3b/0x3b [ 362.382479] [] ? ret_from_fork+0x7c/0xb0 [ 362.382486] [] ? kthread_freezable_should_stop+0x3b/0x3b [ 362.382491] ---[ end trace 8c9c4e19c81db3ff ]--- [ 362.382494] wlp4s0: Failed to join IBSS, beacons forbidden [ 363.739997] brcmsmac bcma0:0: brcms_ops_bss_info_changed: Beacon enabled: false [ 363.740008] brcmsmac bcma0:0: brcms_ops_bss_info_changed: IBSS joined: false (implement) > Thanks, > Simon > > On Mon, Oct 21, 2013 at 02:09:40PM +0200, Dirk Gouders wrote: >> Hello Simon, all, >> >> Recently, I noticed many traces (find a sample attached) in situations >> when wpa_supplicant is running but no appropriate access-point available. >> >> I started a bisect and ended at commit 3aede78aad2a7e >> (mac80211: change IBSS channel state to chandef). >> >> Please let me know if you need more information to inspect this problem. >> >> Best regards, >> >> Dirk >> >> ------------------------------------------------------------------------ >> Oct 21 13:56:06 lena kernel: ------------[ cut here ]------------ >> Oct 21 13:56:06 lena kernel: WARNING: CPU: 0 PID: 1550 at net/wireless/chan.c:373 cfg80211_chandef_usable+0x30/0x15f() >> Oct 21 13:56:06 lena kernel: Modules linked in: brcmsmac cordic brcmutil bcma >> Oct 21 13:56:06 lena kernel: CPU: 0 PID: 1550 Comm: kworker/u4:5 Tainted: G W 3.12.0-rc6+ #20 >> Oct 21 13:56:06 lena kernel: Hardware name: LENOVO 08946MG/MoutCook, BIOS 33CN14WW 05/10/2010 >> Oct 21 13:56:06 lena kernel: Workqueue: phy0 ieee80211_iface_work >> Oct 21 13:56:06 lena kernel: 0000000000000000 0000000000000009 ffffffff8161e3c7 0000000000000000 >> Oct 21 13:56:06 lena kernel: ffffffff81068b00 ffff88006f8be7c0 ffffffff815e79e4 0000000000000000 >> Oct 21 13:56:06 lena kernel: 000000000000000f ffff8800703e5dc2 ffff8800703e5d50 ffff88006f8bc200 >> Oct 21 13:56:06 lena kernel: Call Trace: >> Oct 21 13:56:06 lena kernel: [] ? dump_stack+0x50/0x80 >> Oct 21 13:56:06 lena kernel: [] ? warn_slowpath_common+0x73/0x8b >> Oct 21 13:56:06 lena kernel: [] ? cfg80211_chandef_usable+0x30/0x15f >> Oct 21 13:56:06 lena kernel: [] ? cfg80211_chandef_usable+0x30/0x15f >> Oct 21 13:56:06 lena kernel: [] ? __ieee80211_sta_join_ibss+0x162/0x6e2 >> Oct 21 13:56:06 lena kernel: [] ? printk+0x4f/0x54 >> Oct 21 13:56:06 lena kernel: [] ? ieee80211_sta_create_ibss+0xc8/0xce >> Oct 21 13:56:06 lena kernel: [] ? ieee80211_ibss_work+0x255/0x3c5 >> Oct 21 13:56:06 lena kernel: [] ? process_one_work+0x1c7/0x2e6 >> Oct 21 13:56:06 lena kernel: [] ? pwq_activate_delayed_work+0x1e/0x28 >> Oct 21 13:56:06 lena kernel: [] ? worker_thread+0x1cb/0x2c4 >> Oct 21 13:56:06 lena kernel: [] ? rescuer_thread+0x25c/0x25c >> Oct 21 13:56:06 lena kernel: [] ? kthread+0xad/0xb5 >> Oct 21 13:56:06 lena kernel: [] ? kthread_create_on_node+0xc1/0x115 >> Oct 21 13:56:06 lena kernel: [] ? kthread_freezable_should_stop+0x3b/0x3b >> Oct 21 13:56:06 lena kernel: [] ? ret_from_fork+0x7c/0xb0 >> Oct 21 13:56:06 lena kernel: [] ? kthread_freezable_should_stop+0x3b/0x3b >> Oct 21 13:56:06 lena kernel: ---[ end trace ade89af8f1b5d90f ]--- >> ------------------------------------------------------------------------ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/