Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Mon, 29 Aug 2022 09:48:44 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Maxime Coquelin <maxime.coquelin@redhat.com>
Cc:     linux-kernel@vger.kernel.org,
        virtualization@lists.linux-foundation.org, elic@nvidia.com,
        guanjun@linux.alibaba.com, parav@nvidia.com,
        gautam.dawar@xilinx.com, dan.carpenter@oracle.com,
        xieyongji@bytedance.com, jasowang@redhat.com, mst@redhat.com,
        stable@vger.kernel.org
Subject: Re: [PATCH v2] vduse: prevent uninitialized memory accesses
Message-ID: <YwxvXFiuRqGxRgZH@kroah.com>
References: <20220829073424.5677-1-maxime.coquelin@redhat.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20220829073424.5677-1-maxime.coquelin@redhat.com>
Precedence: bulk

On Mon, Aug 29, 2022 at 09:34:24AM +0200, Maxime Coquelin wrote:
> If the VDUSE application provides a smaller config space
> than the driver expects, the driver may use uninitialized
> memory from the stack.
> 
> This patch prevents it by initializing the buffer passed by
> the driver to store the config value.
> 
> This fix addresses CVE-2022-2308.
> 
> Cc: xieyongji@bytedance.com
> Cc: stable@vger.kernel.org # v5.15+
> Fixes: c8a6153b6c59 ("vduse: Introduce VDUSE - vDPA Device in Userspace")
> 
> Acked-by: Jason Wang <jasowang@redhat.com>
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>

Please no blank line above the Acked-by: line here if possible.

thanks,

greg k-h