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Date: Mon, 18 May 2015 18:27:28 +0200
From: Alexander Aring <alex.aring@gmail.com>
Subject: Re: Kernel crash when using multiple interfaces
Message-ID: <20150518162727.GD749@omega>
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To: Simon Vincent <simon.vincent@xsilon.com>
Cc: linux-wpan@vger.kernel.org

On Mon, May 18, 2015 at 05:37:12PM +0200, Alexander Aring wrote:
> Hi,
> 
> On Mon, May 18, 2015 at 04:05:38PM +0100, Simon Vincent wrote:
> > With your patch I get either a "bad paging request" or a NULL pointer
> > dereference crash at startup. I have not had any problems with my patch.
> > 
> > Here are two stack traces I get.
> > 
> > [   12.223057] [<c04da1b8>] (ieee802154_stop_queue) from [<c04d6d64>]
> > 
> > or
> > 
> > [   12.548824] [<c04da1b8>] (ieee802154_stop_queue) from [<c04d6d64>]
> 
> Both crashes in ieee802154_stop_queue, but we don't changed anything
> which should affect the ieee802154_stop_queue in my or your fix.
>

Ah, it could be that it failed in ieee802154_tx after calling
ieee802154_stop_queue. Are you sure that you don't miss some & for
handling with pointers and then we have some invalid address?

- Alex