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

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Date:	Mon, 21 Jul 2008 08:24:19 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mingo@...e.hu
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-wireless@...r.kernel.org
Subject: Re: [crash] BUG: unable to handle kernel NULL pointer dereference
 at 0000000000000370

From: Ingo Molnar <mingo@...e.hu>
Date: Mon, 21 Jul 2008 17:04:48 +0200

[ Adding linux-wireless CC, again, Ingo please retain it for
  followups, thanks! ]

> * Ingo Molnar <mingo@...e.hu> wrote:
> 
> > > Pid: 1, comm: swapper Not tainted 2.6.26-tip-00013-g6de15c6-dirty #21290
> > 
> > some more information: find below the same crash with vanilla 
> > linus/master and no extra patches. The crash site is:
> 
> a 32-bit testbox just triggered the same crash too:
> 
>  calling  init_mac80211_hwsim+0x0/0x310
>  mac80211_hwsim: Initializing radio 0
>  phy0: Failed to select rate control algorithm
>  phy0: Failed to initialize rate control algorithm
>  mac80211_hwsim: ieee80211_register_hw failed (-2)
>  BUG: unable to handle kernel NULL pointer dereference at 00000298
>  IP: [<c06efb98>] rollback_registered+0x28/0x120
>  *pdpt = 0000000000bc9001 *pde = 0000000000000000
>  Oops: 0000 [#1] PREEMPT SMP
> 
> and that system has no wireless so i guess it's just some unregister 
> inbalance kind of init/deinit buglet.
> 
> 	Ingo
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