linux-kernel - Re: [PATCH 1/3 v4] drivers/bus: Added Freescale Management Complex APIs

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Date:	Thu, 27 Nov 2014 15:29:43 +0100
From:	Alexander Graf <agraf@...e.de>
To:	"J. German Rivera" <German.Rivera@...escale.com>,
	gregkh@...uxfoundation.org, arnd@...db.de,
	linux-kernel@...r.kernel.org
CC:	stuart.yoder@...escale.com, Kim.Phillips@...escale.com,
	scottwood@...escale.com, bhamciu1@...escale.com,
	R89243@...escale.com, Geoff.Thorpe@...escale.com,
	bhupesh.sharma@...escale.com, nir.erez@...escale.com,
	richard.schmitt@...escale.com
Subject: Re: [PATCH 1/3 v4] drivers/bus: Added Freescale Management Complex
 APIs



On 13.11.14 18:54, J. German Rivera wrote:
> APIs to access the Management Complex (MC) hardware
> module of Freescale LS2 SoCs. This patch includes
> APIs to check the MC firmware version and to manipulate
> DPRC objects in the MC.
> 
> Signed-off-by: J. German Rivera <German.Rivera@...escale.com>
> Signed-off-by: Stuart Yoder <stuart.yoder@...escale.com>

[...]

> +/*
> + * Object descriptor, returned from dprc_get_obj()
> + */
> +struct dprc_obj_desc {
> +	/* Type of object: NULL terminated string */
> +	char type[16];

I don't see where it actually gets NULL terminated - all 16 bytes come
directly from the device.

While it's probably ok to trust it, I think we'd still be safer off if
we just make this a char[17] array to always have our NULL terminating
string. That way we're guaranteed we'll never run over our memory
boundaries.

Also sorry for the slowly trickling in comments - I'm just noting things
as I dig through the whole interface :).


Alex
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