netdev - Re: [PATCH] wext: handle NULL exta data in iwe_stream_add

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Date:   Thu, 12 Jan 2017 10:16:00 +0100
From:   Johannes Berg <johannes@...solutions.net>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     linux-wireless@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Networking <netdev@...r.kernel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] wext: handle NULL exta data in iwe_stream_add_point
 better

On Wed, 2017-01-11 at 21:39 +0100, Arnd Bergmann wrote:
> On Wednesday, January 11, 2017 4:06:17 PM CET Johannes Berg wrote:
> > 
> > Applied. Also fixed the typo in the subject :)
> 
> Thanks! Unfortunately I now got another warning for the same
> function, and though I would have expected the patch to fix it, that
> did not work:
> 
> In file included from /git/arm-
> soc/drivers/net/wireless/intersil/prism54/islpci_dev.h:27:0,
>                  from /git/arm-
> soc/drivers/net/wireless/intersil/prism54/isl_ioctl.h:24,
>                  from /git/arm-
> soc/drivers/net/wireless/intersil/prism54/isl_ioctl.c:32:
> /git/arm-soc/drivers/net/wireless/intersil/prism54/isl_ioctl.c: In
> function 'prism54_get_scan':
> /git/arm-soc/include/net/iw_handler.h:560:4: error: argument 2 null
> where non-null expected [-Werror=nonnull]
>     memcpy(stream + point_len, extra, iwe->u.data.length);

And I realized only now that this was a different place ...

I've just added the check you suggested - spent way too much time
already on this old crap :)

johannes