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

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Date:	Sat, 31 May 2008 22:29:13 +0200
From:	"Stefanik Gábor" <netrolller.3d@...il.com>
To:	"Johannes Berg" <johannes@...solutions.net>
Cc:	"Michael Buesch" <mb@...sch.de>, "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 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?
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