Re: [PATCH -next v2] usbip: vudc: fix missing unlock on error in usbip_sockfd_store()

[Greg KH <gregkh@linuxfoundation.org>]

On Thu, Apr 08, 2021 at 07:23:05PM +0800, Ye Bin wrote:
> Add the missing unlock before return from function usbip_sockfd_store()
> in the error handling case.
> 
> Fixes: bd8b82042269 ("usbip: vudc synchronize sysfs code paths")
> Reported-by: Hulk Robot <hulkci@huawei.com>
> Signed-off-by: Ye Bin <yebin10@huawei.com>
> ---
>  drivers/usb/usbip/vudc_sysfs.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/usb/usbip/vudc_sysfs.c b/drivers/usb/usbip/vudc_sysfs.c
> index f7633ee655a1..d1cf6b51bf85 100644
> --- a/drivers/usb/usbip/vudc_sysfs.c
> +++ b/drivers/usb/usbip/vudc_sysfs.c
> @@ -156,12 +156,14 @@ static ssize_t usbip_sockfd_store(struct device *dev,
>  		tcp_rx = kthread_create(&v_rx_loop, &udc->ud, "vudc_rx");
>  		if (IS_ERR(tcp_rx)) {
>  			sockfd_put(socket);
> +			mutex_unlock(&udc->ud.sysfs_lock);
>  			return -EINVAL;
>  		}
>  		tcp_tx = kthread_create(&v_tx_loop, &udc->ud, "vudc_tx");
>  		if (IS_ERR(tcp_tx)) {
>  			kthread_stop(tcp_rx);
>  			sockfd_put(socket);
> +			mutex_unlock(&udc->ud.sysfs_lock);
>  			return -EINVAL;
>  		}
>  
> -- 
> 2.25.4
> 

This breaks the build, are you sure you tested it???