linux-kernel - Re: [PATCH 3/6] mfd: dm355evm_msp: Return directly after a failed platform_device_alloc() in add

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20160628150357.GK24982@dell>
Date:	Tue, 28 Jun 2016 16:03:57 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:	Tony Lindgren <tony@...mide.com>, linux-omap@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH 3/6] mfd: dm355evm_msp: Return directly after a failed
 platform_device_alloc() in add_child()

On Sun, 26 Jun 2016, SF Markus Elfring wrote:

> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Sun, 26 Jun 2016 13:40:35 +0200
> 
> The platform_device_put() function was called in one case by the
> add_child() function during error handling even if the passed
> variable "pdev" contained a null pointer.
> Return directly in this case.
> 
> This issue was detected by using the Coccinelle software.
> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  drivers/mfd/dm355evm_msp.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)

Applied, thanks.

> diff --git a/drivers/mfd/dm355evm_msp.c b/drivers/mfd/dm355evm_msp.c
> index 14661ec..270e19c 100644
> --- a/drivers/mfd/dm355evm_msp.c
> +++ b/drivers/mfd/dm355evm_msp.c
> @@ -199,11 +199,8 @@ static struct device *add_child(struct i2c_client *client, const char *name,
>  	int			status;
>  
>  	pdev = platform_device_alloc(name, -1);
> -	if (!pdev) {
> -		dev_dbg(&client->dev, "can't alloc dev\n");
> -		status = -ENOMEM;
> -		goto err;
> -	}
> +	if (!pdev)
> +		return ERR_PTR(-ENOMEM);
>  
>  	device_init_wakeup(&pdev->dev, can_wakeup);
>  	pdev->dev.parent = &client->dev;

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog