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 <redacted>
Signed-off-by: Maxime Coquelin <redacted>

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

thanks,

greg k-h
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