Subject: Re: iwl4965 oops in 2.6.26-rc5 x86_64
From: Dan Williams <dcbw@redhat.com>
To: Tomas Winkler <tomasw@gmail.com>
Cc: Thomas Backlund <tmb@mandriva.org>,
	Ian Schram <ischram@telenet.be>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
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Date: Fri, 06 Jun 2008 10:29:29 -0400
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On Fri, 2008-06-06 at 16:59 +0300, Tomas Winkler wrote:
> On Fri, Jun 6, 2008 at 3:33 PM, Thomas Backlund <tmb@mandriva.org> wrote:
> > Thomas Backlund skrev:
> >>
> >> Tomas Winkler skrev:
> >>>
> >>> On Fri, Jun 6, 2008 at 3:44 AM, Ian Schram <ischram@telenet.be> wrote:
> >>>>
> >>>> Isn't this the Oops Joonwoo Park wanted to patch with
> >>>>
> >>>> "[PATCH] iwlwifi: fix oops on wep key insertion" 27/5/2008
> >>>>
> >>>> invalid length of webkey that would/should be handled in mac80211?
> >>>>
> >>>> ian
> >>>
> >>> Yes, it looks like.
> >>
> >> Ummm, what has a wep key to do with me trying to access a WPA2-Personal
> >> encrypted net ?
> 
> Not sure yet, but mac is trying to assign default/static wep key.

The output of wpa_supplicant with "-dddt" would be quite useful in
figuring this out.

The supplicant does always _clear_ static WEP keys when it starts the
interface, when a connection drops, and when it quits.  Maybe that's
where it's coming from?  But it should just be setting the "disabled"
bit in the WEXT structure and sending a key of all zeros.

Dan

> :iwlcore:iwl_send_static_wepkey_cmd+0xcb/0xd5
> :iwlcore:iwl_set_default_wep_key+0xa2/0xbc
> 
> Try to set the encryption explicitly
> network={
>     psk="*************************"
>     scan_ssid=1
>     ssid="dlink"
>     pairwise=CCMP
>    group=CCMP
>  }
> 
> 
> >>
> >>> Thomas can you send out your wpa_supplicant config fiele
> >>>
> >>
> >> I could, but since I would have to remove any sensitive info such as the
> >> psk key, would it be of any use ?
> >
> > Anyway, here configs are:
> >
> > wpa_supplicant.conf
> > (I stripped all the comments from the file)
> > --- cut ---
> > ctrl_interface=/var/run/wpa_supplicant
> >
> > eapol_version=1
> >
> > ap_scan=1
> >
> > fast_reauth=1
> >
> > blob-base64-exampleblob={
> > SGVsbG8gV29ybGQhCg==
> > }
> >
> > network={
> >    psk="*************************"
> >    scan_ssid=1
> >    ssid="dlink"
> > }
> > --- cut ---
> >
> > ifcfg-wlan0
> > --- cut ---
> > DEVICE=wlan0
> > BOOTPROTO=dhcp
> > ONBOOT=yes
> > METRIC=35
> > MII_NOT_SUPPORTED=no
> > USERCTL=no
> > RESOLV_MODS=no
> > WIRELESS_MODE=Managed
> > WIRELESS_ESSID=dlink
> > WIRELESS_ENC_KEY='s:*************************'
> > WIRELESS_WPA_DRIVER=wext
> > IPV6INIT=no
> > IPV6TO4INIT=no
> > DHCP_CLIENT=dhclient
> > NEEDHOSTNAME=no
> > PEERDNS=yes
> > PEERYP=yes
> > PEERNTPD=no
> > --- cut ---
> >
> >>
> >>> I will provide a patch that disable hw encryption on long wep keys. It
> >>> get lost in my todo list.
> >>> Tomas
> >>>
> >>
> >
> > --
> > Thomas
> >
> >
> >
> --
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