linux-kernel - Re: [crash] BUG: unable to handle kernel NULL pointer dereference at 0000000000000370

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Message-ID: <48850121.9090106@trash.net>
Date:	Mon, 21 Jul 2008 23:35:29 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	David Miller <davem@...emloft.net>
CC:	Larry.Finger@...inger.net, mingo@...e.hu, ischram@...enet.be,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-wireless@...r.kernel.org, j@...fi
Subject: Re: [crash] BUG: unable to handle kernel NULL pointer dereference
 at 0000000000000370

Patrick McHardy wrote:
> David Miller wrote:
>> Maybe something like the following should do it?
> 
> 
> It looks correct in any case. I'm not sure whether it fixes
> this lockdep warning though, according to the backtrace and
> module list its b43 and dev_mc_sync in net/mac80211/main.c
> that are causing the error, which don't seem to be included
> in your patch. I'm unable to find where it previously
> initialized the xmit_lock lockdep class though, so I must
> be missing something :)

This is what I was missing, we're setting a lockdep class
by default depending on dev->type. This patch combined
with yours should fix all addr_list_lock warnings.



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