linux-kernel - Re: [PATCH] USB: usbip: remove useless call in usbip

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Date:   Tue, 2 Jan 2018 16:36:28 -0700
From:   Shuah Khan <shuah@...nel.org>
To:     "Gustavo A. R. Silva" <garsilva@...eddedor.com>,
        Valentina Manea <valentina.manea.m@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Shuah Khan <shuahkh@....samsung.com>,
        Shuah Khan <shuah@...nel.org>
Subject: Re: [PATCH] USB: usbip: remove useless call in usbip_recv

On 01/02/2018 07:02 AM, Gustavo A. R. Silva wrote:
> Calling msg_data_left(&msg) is only useful for its return value,
> which in this particular case is ignored.
> 
> Fix this by removing such call.
> 
> Addresses-Coverity-ID: 1427080
> Fixes: 90120d15f4c3 ("usbip: prevent leaking socket pointer address in messages")
> Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
> ---
>  drivers/usb/usbip/usbip_common.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/usb/usbip/usbip_common.c b/drivers/usb/usbip/usbip_common.c
> index 7b219d9..b5af6fc 100644
> --- a/drivers/usb/usbip/usbip_common.c
> +++ b/drivers/usb/usbip/usbip_common.c
> @@ -325,7 +325,6 @@ int usbip_recv(struct socket *sock, void *buf, int size)
>  	usbip_dbg_xmit("enter\n");
>  
>  	do {
> -		msg_data_left(&msg);
>  		sock->sk->sk_allocation = GFP_NOIO;
>  
>  		result = sock_recvmsg(sock, &msg, MSG_WAITALL);
> 

Thanks for the patch. Looks good to me.

Acked-by: Shuah Khan <shuahkh@....samsung.com>

Greg, please pick this patch up.

thanks,
-- Shuah