netdev - Re: [PATCH net] vhost: validate vhost_get_vq

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Date:	Fri, 28 Mar 2014 16:11:08 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	mst@...hat.com
Cc:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	virtio-dev@...ts.oasis-open.org,
	virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
	jasowang@...hat.com
Subject: Re: [PATCH net] vhost: validate vhost_get_vq_desc return value

From: "Michael S. Tsirkin" <mst@...hat.com>
Date: Thu, 27 Mar 2014 12:53:37 +0200

> vhost fails to validate negative error code
> from vhost_get_vq_desc causing
> a crash: we are using -EFAULT which is 0xfffffff2
> as vector size, which exceeds the allocated size.
> 
> The code in question was introduced in commit
> 8dd014adfea6f173c1ef6378f7e5e7924866c923
>     vhost-net: mergeable buffers support
> 
> CVE-2014-0055
> 
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> ---
> 
> This is needed in -stable.

Applied and queued up for -stable, thanks Michael.
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