linux-kernel - Re: Wireless-testing's b43 panics in b43_generate

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Message-Id: <200805312248.55551.mb@bu3sch.de>
Date:	Sat, 31 May 2008 22:48:55 +0200
From:	Michael Buesch <mb@...sch.de>
To:	"Stefanik Gábor" <netrolller.3d@...il.com>
Cc:	"Johannes Berg" <johannes@...solutions.net>,
	"Pavel Roskin" <proski@....org>,
	linux-wireless <linux-wireless@...r.kernel.org>,
	"bcm43xx-dev@...ts.berlios.de" <bcm43xx-dev@...ts.berlios.de>,
	linux-kernel@...r.kernel.org
Subject: Re: Wireless-testing's b43 panics in b43_generate_txhdr on packet transmit

On Saturday 31 May 2008 22:29:13 Stefanik Gábor wrote:
> On Sat, May 31, 2008 at 10:22 PM, Johannes Berg
> <johannes@...solutions.net> wrote:
> > On Sat, 2008-05-31 at 19:54 +0200, Michael Buesch wrote:
> >> On Saturday 31 May 2008 18:50:36 Pavel Roskin wrote:
> >> > On Sat, 2008-05-31 at 18:41 +0200, Michael Buesch wrote:
> >> > > On Saturday 31 May 2008 18:34:29 Stefanik Gábor wrote:
> >> > > > "BUG: unable to handle kernel NULL pointer dereference at 00000004
> >> > > > IP: [<f8dd3a99>] :b43:b43_generate_txhdr+0x6a9/0x790
> >> > >
> >> > > So can you put a few printks into the function to see where it dereferences
> >> > > a NULL pointer? (or use gdb to lookup the offset).
> >> >
> >> > u8 key_idx = info->control.hw_key->hw_key_idx;
> >> >
> >> > info->control.hw_key is NULL.
> >>
> >> Is a NULL pointer supposed to tell "do not encrypt", or is this a mac80211 bug?
> >
> > It's probably a bug.
> >
> > johannes
> >
> 
> Should we assume that it's the first key if it happens?

No. It looks like it should not happen at all.


-- 
Greetings Michael.
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