linux-kernel - Re: [patch v2] ipmi: info leak in compat_ipmi

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Date:	Fri, 31 May 2013 07:58:24 -0500
From:	Corey Minyard <tcminyard@...il.com>
To:	Dan Carpenter <dan.carpenter@...cle.com>
CC:	openipmi-developer@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [patch v2] ipmi: info leak in compat_ipmi_ioctl()

On 05/31/2013 07:46 AM, Dan Carpenter wrote:
> On x86_64 there is a 4 byte hole between ->recv_type and ->addr.

Got it, in my tree now.  Thanks.

>
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> ---
> v2: fixed the changelog a little.  Also added LKML because the
> openipmi is a moderated list (and the moderator thought my email was
> spam).

I apologize, the list gets a lot of spam, and I must have made a mistake.

-corey

>
> diff --git a/drivers/char/ipmi/ipmi_devintf.c b/drivers/char/ipmi/ipmi_devintf.c
> index 9eb360f..8e306ac 100644
> --- a/drivers/char/ipmi/ipmi_devintf.c
> +++ b/drivers/char/ipmi/ipmi_devintf.c
> @@ -810,6 +810,7 @@ static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd,
>   		struct ipmi_recv   __user *precv64;
>   		struct ipmi_recv   recv64;
>   
> +		memset(&recv64, 0, sizeof(recv64));
>   		if (get_compat_ipmi_recv(&recv64, compat_ptr(arg)))
>   			return -EFAULT;
>   

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