linux-kernel - Re: [PATCH 1/2] clk: s2mps11: Fix possible NULL pointer dereference

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Date:	Mon, 24 Mar 2014 17:07:05 -0700
From:	Mike Turquette <mturquette@...aro.org>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org
Cc:	"Tushar Behera" <tushar.behera@...aro.org>,
	"Kyungmin Park" <kyungmin.park@...sung.com>,
	"Marek Szyprowski" <m.szyprowski@...sung.com>,
	"Bartlomiej Zolnierkiewicz" <b.zolnierkie@...sung.com>,
	"Tomasz Figa" <t.figa@...sung.com>,
	"Krzysztof Kozlowski" <k.kozlowski@...sung.com>,
	stable@...r.kernel.org
Subject: Re: [PATCH 1/2] clk: s2mps11: Fix possible NULL pointer dereference

Quoting Krzysztof Kozlowski (2014-03-21 05:18:17)
> If parent device does not have of_node set the s2mps11_clk_parse_dt()
> returned NULL. This NULL was later passed to of_clk_add_provider() which
> dereferenced it in pr_debug() call.
> 
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>

I've taken both of these patches into clk-next.

Thanks!
Mike

> Cc: <stable@...r.kernel.org>
> ---
>  drivers/clk/clk-s2mps11.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/clk-s2mps11.c b/drivers/clk/clk-s2mps11.c
> index 00a3abe103a5..27c83e45eaed 100644
> --- a/drivers/clk/clk-s2mps11.c
> +++ b/drivers/clk/clk-s2mps11.c
> @@ -130,7 +130,7 @@ static struct device_node *s2mps11_clk_parse_dt(struct platform_device *pdev)
>         int i;
>  
>         if (!iodev->dev->of_node)
> -               return NULL;
> +               return ERR_PTR(-EINVAL);
>  
>         clk_np = of_find_node_by_name(iodev->dev->of_node, "clocks");
>         if (!clk_np) {
> -- 
> 1.7.9.5
> 
--
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