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Date: Wed, 23 Oct 2013 07:41:54 +0200 From: Dirk Gouders <dirk@...ders.net> To: Simon Wunderlich <sw@...onwunderlich.de> Cc: Simon Wunderlich <simon.wunderlich@...03.tu-chemnitz.de>, Simon Wunderlich <siwu@....tu-chemnitz.de>, Mathias Kretschmer <mathias.kretschmer@...us.fraunhofer.de>, Johannes Berg <johannes.berg@...el.com>, Linux Kernel <linux-kernel@...r.kernel.org> Subject: Re: [BUG bisected] WARNING: CPU: 0 PID: 1550 at net/wireless/chan.c:373 cfg80211_chandef_usable+0x30/0x15f() Hi Simon, Simon Wunderlich <sw@...onwunderlich.de> writes: > Hey Dirk, > >> 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 >> > > Thanks a lot for this, I could reproduce the issue and fix it, will send the fix > in a minute - please try and report back. thanks a lot, will send my test result immediately. > Just two notes on your setup in case you are interested: Yes, I am interested - I was just afraid to ask, because I didn't want to cause too much noise with probably trivial problems ;-) > * Your wpa-supplicant setup looks a little like an old WPA-NONE setup, but > this is not supported anymore and will not encrypt your messages. Please have > a look at IBSS/RSN if you want encryption. Yes, I very rarely use that connection and always have in mind that it is unencrypted. I will have a look at this but expect the mobile phone side to be the hard one to get it to offer reliable encryption. > * Your wpa_supplicant uses the old wext interface to the kernel. This is > deprecated, it would better to use the (not so) new nl80211 interface instead. > You will also get goodies such as 802.11n rates in ad-hoc mode if your > hardware supports it. :) Thats good to know, I will change my setup accordingly. Thanks again for your help, Dirk > Thanks again for reporting, > Simon -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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