linux-kernel - Re: [PATCH v2] vduse: prevent uninitialized memory accesses

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Date:   Mon, 29 Aug 2022 09:48:44 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Maxime Coquelin <maxime.coquelin@...hat.com>
Cc:     linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, elic@...dia.com,
        guanjun@...ux.alibaba.com, parav@...dia.com,
        gautam.dawar@...inx.com, dan.carpenter@...cle.com,
        xieyongji@...edance.com, jasowang@...hat.com, mst@...hat.com,
        stable@...r.kernel.org
Subject: Re: [PATCH v2] vduse: prevent uninitialized memory accesses

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@...edance.com
> Cc: stable@...r.kernel.org # v5.15+
> Fixes: c8a6153b6c59 ("vduse: Introduce VDUSE - vDPA Device in Userspace")
> 
> Acked-by: Jason Wang <jasowang@...hat.com>
> Signed-off-by: Maxime Coquelin <maxime.coquelin@...hat.com>

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

thanks,

greg k-h