Re: [PATCH v2] vduse: prevent uninitialized memory accesses

[Maxime Coquelin]

On 8/31/22 17:46, Michael S. Tsirkin wrote:
> On Wed, Aug 31, 2022 at 05:01:11PM +0200, Maxime Coquelin wrote:
> > On 8/29/22 09:48, Greg KH wrote:
> > > 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@xxxxxxxxxxxxx
> > > > Cc: stable@xxxxxxxxxxxxxxx # v5.15+
> > > > Fixes: c8a6153b6c59 ("vduse: Introduce VDUSE - vDPA Device in Userspace")
> > > >
> > > > Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
> > > > Signed-off-by: Maxime Coquelin <maxime.coquelin@xxxxxxxxxx>
> > >
> > > Please no blank line above the Acked-by: line here if possible.
> >
> > Sure.
> >
> > Jason, do you prefer I post a new revision with this single change or
> > you will handle it while applying? Either way is fine to me.
> >
> > Thanks,
> > Maxime
>
> I queue these normally.

Ok, I'm preparing the V2.

Thanks,
Maxime

> > > thanks,
> > >
> > > greg k-h