linux-kernel - Re: [PATCH 1/4] Drivers: hv: utils: fix memory leak on on

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Message-ID: <20151116155407.GK18797@mwanda>
Date:	Mon, 16 Nov 2015 18:54:07 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Vitaly Kuznetsov <vkuznets@...hat.com>
Cc:	devel@...uxdriverproject.org,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	Olaf Hering <olaf@...fle.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] Drivers: hv: utils: fix memory leak on on_msg()
 failure

On Thu, Nov 12, 2015 at 12:32:13PM +0100, Vitaly Kuznetsov wrote:
> @@ -85,10 +86,10 @@ static ssize_t hvt_op_write(struct file *file, const char __user *buf,
>  		return PTR_ERR(inmsg);
>  
>  	if (hvt->on_msg(inmsg, count))
> -		return -EFAULT;
> +		ret = -EFAULT;

You fix this leak and then re-introduce it again directly in patch 3/4.
Also it might be nice to preserve the error code.

	ret = hvt->on_msg(inmsg, count);

	kfree(inmsg);

	return ret ? ret : count;

regards,
dan carpenter
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