linux-kernel - Re: [PATCH][next] usbip: Fix incorrect double assignment to udc->ud.tcp

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Date:   Thu, 11 Mar 2021 11:55:30 -0700
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Colin King <colin.king@...onical.com>,
        Valentina Manea <valentina.manea.m@...il.com>,
        Shuah Khan <shuah@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, Shuah Khan <skhan@...uxfoundation.org>
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] usbip: Fix incorrect double assignment to
 udc->ud.tcp_rx

On 3/11/21 7:16 AM, Shuah Khan wrote:
> On 3/11/21 3:44 AM, Colin King wrote:
>> From: Colin Ian King <colin.king@...onical.com>
>>
>> Currently udc->ud.tcp_rx is being assigned twice, the second assignment
>> is incorrect, it should be to udc->ud.tcp_tx instead of rx. Fix this.
>>
>> Addresses-Coverity: ("Unused value")
>> Fixes: 46613c9dfa96 ("usbip: fix vudc usbip_sockfd_store races leading 
>> to gpf")
>> Signed-off-by: Colin Ian King <colin.king@...onical.com>
>> ---
>>   drivers/usb/usbip/vudc_sysfs.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/usb/usbip/vudc_sysfs.c 
>> b/drivers/usb/usbip/vudc_sysfs.c
>> index a3ec39fc6177..7383a543c6d1 100644
>> --- a/drivers/usb/usbip/vudc_sysfs.c
>> +++ b/drivers/usb/usbip/vudc_sysfs.c
>> @@ -174,7 +174,7 @@ static ssize_t usbip_sockfd_store(struct device *dev,
>>           udc->ud.tcp_socket = socket;
>>           udc->ud.tcp_rx = tcp_rx;
>> -        udc->ud.tcp_rx = tcp_tx;
>> +        udc->ud.tcp_tx = tcp_tx;
>>           udc->ud.status = SDEV_ST_USED;
>>           spin_unlock_irq(&udc->ud.lock);
>>
> 
> Thank you for finding and fixing this. This is my bad.
> 
> Acked-by: Shuah Khan <skhan@...uxfoundation.org>
> 

Applies to stables as well since the 46613c9dfa96 is marked for
stables.

thanks,
-- Shuah