linux-kernel - Re: [PATCH] USB: gadget: f

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Message-ID: <xa1thad6xsvk.fsf@mina86.com>
Date:	Fri, 27 Sep 2013 16:05:03 +0200
From:	Michal Nazarewicz <mina86@...a86.com>
To:	Robert Baldyga <r.baldyga@...sung.com>, balbi@...com
Cc:	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, b.zolnierkie@...sung.com,
	m.szyprowski@...sung.com, andrzej.p@...sung.com,
	Robert Baldyga <r.baldyga@...sung.com>
Subject: Re: [PATCH] USB: gadget: f_fs: fix error handling

On Fri, Sep 27 2013, Robert Baldyga wrote:
> This patch add missing error check in ffs_func_bind() function, after
> ffs_do_descs() funcion call for hs descriptors. Without this check it's
> possible that the module will try dereference incorrect pointer.
>
> Signed-off-by: Robert Baldyga <r.baldyga@...sung.com>

Acked-by: Michal Nazarewicz <mina86@...a86.com>

> ---
>  drivers/usb/gadget/f_fs.c |    3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
> index 1a66c5b..fe7d532 100644
> --- a/drivers/usb/gadget/f_fs.c
> +++ b/drivers/usb/gadget/f_fs.c
> @@ -2264,7 +2264,10 @@ static int ffs_func_bind(struct usb_configuration *c,
>  				   data->raw_descs + ret,
>  				   (sizeof data->raw_descs) - ret,
>  				   __ffs_func_bind_do_descs, func);
> +		if (unlikely(ret < 0))
> +			goto error;
>  	}
> +	

This new line with only a tab in it is not needed here though.

>  
>  	/*
>  	 * Now handle interface numbers allocation and interface and

-- 
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.o. | Liege of Serenely Enlightened Majesty of      o' \,=./ `o
..o | Computer Science,  Michał “mina86” Nazarewicz    (o o)
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