[U-Boot] [PATCH] usb: gadget: composite: fix NULL pointer when a non standard request is received

[Patrice CHOTARD]

Thanks Lukasz ;-)

On 04/26/2018 03:17 PM, Lukasz Majewski wrote:
> Hi Patrice,
> 
>> Hi
>>
>> It's a gentle reminder as this patch is present on mailing list since
>> 5 weeks without any feedback.
> 
> Deepest apologizes for the delay.
> 
> I will test this patch - as some Samsung SoCs may use this feature and
> let you know.
> 
>>
>> Thanks
>>
>> On 03/15/2018 09:34 AM, patrice.chotard at st.com wrote:
>>> From: Christophe Kerello <christophe.kerello at st.com>
>>>
>>> In case usb configuration is unknown (cdev->config == NULL), non
>>> standard request should not be processed.
>>> Remove also the cdev->config check below which will never happen.
>>>
>>> This issue was seen using ums feature.
>>>
>>> Signed-off-by: Christophe Kerello <christophe.kerello at st.com>
>>> Signed-off-by: Patrice Chotard <patrice.chotard at st.com>
>>> ---
>>>    drivers/usb/gadget/composite.c | 5 ++++-
>>>    1 file changed, 4 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/usb/gadget/composite.c
>>> b/drivers/usb/gadget/composite.c index d0ee7847b98d..a87639def974
>>> 100644 --- a/drivers/usb/gadget/composite.c
>>> +++ b/drivers/usb/gadget/composite.c
>>> @@ -838,6 +838,9 @@ unknown:
>>>    			ctrl->bRequestType, ctrl->bRequest,
>>>    			w_value, w_index, w_length);
>>>    
>>> +		if (!cdev->config)
>>> +			goto done;
>>> +
>>>    		/*
>>>    		 * functions always handle their interfaces and
>>> endpoints...
>>>    		 * punt other recipients (other, WUSB, ...) to
>>> the current @@ -882,7 +885,7 @@ unknown:
>>>    			value = f->setup(f, ctrl);
>>>    		else {
>>>    			c = cdev->config;
>>> -			if (c && c->setup)
>>> +			if (c->setup)
>>>    				value = c->setup(c, ctrl);
>>>    		}
>>>    
>>>   
> 
> 
> 
> 
> Best regards,
> 
> Lukasz Majewski
> 
> --
> 
> DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
>