netdev - Re: [PATCH] USB: hso: Fix OOB memory access in hso_probe/hso_get_config

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Message-Id: <20181209.115429.682021500318327981.davem@davemloft.net>
Date:   Sun, 09 Dec 2018 11:54:29 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     gregkh@...uxfoundation.org
Cc:     netdev@...r.kernel.org, linux-usb@...r.kernel.org,
        bigeasy@...utronix.de, benquike@...il.com,
        mathias.payer@...elwelt.net
Subject: Re: [PATCH] USB: hso: Fix OOB memory access in
 hso_probe/hso_get_config_data

From: Greg KH <gregkh@...uxfoundation.org>
Date: Sun, 9 Dec 2018 17:32:45 +0100

> +	} else {
>  		port_spec = hso_get_config_data(interface);
> +		if (IS_ERR_VALUE((long)port_spec))
> +			goto exit;

'port_spec' is an 'int', it makes no sense to cast it 3 times all the
way back to 'int' to figure out if it is a negative error value or
not. (--> long --> void * --> int)