Re: [PATCH for-7.0] virtio-iommu: use-after-free fix

[Peter Maydell <peter.maydell@linaro.org>]

On Thu, 7 Apr 2022 at 15:50, Michael S. Tsirkin <mst@redhat.com> wrote:
>
> On Thu, Apr 07, 2022 at 11:03:16AM +0100, Peter Maydell wrote:
> > On Thu, 7 Apr 2022 at 10:52, Michael S. Tsirkin <mst@redhat.com> wrote:
> > >
> > > From: Wentao Liang <Wentao_Liang_g@163.com>
> > >
> > > A potential Use-after-free was reported in virtio_iommu_handle_command
> > > when using virtio-iommu:
> > >
> > > > I find a potential Use-after-free in QEMU 6.2.0, which is in
> > > > virtio_iommu_handle_command() (./hw/virtio/virtio-iommu.c).
> >
> > So, this isn't a regression. Do you think it's critically necessary
> > it goes in 7.0, or is it in the category "put it into 7.0 if we
> > need an rc4 for some other reason anyway" ?
> >
> > (I have a feeling we'll need an rc4, but we'll see.)
> >
> > thanks
> > -- PMM
>
> I am concerned it can be used to trigger a CVE but I could not
> find a way. So I would say if there's an rc4 pls include it
> but if not then we can pick it up in stable.

We needed an rc4 for a couple of other security fixes, so I've
applied this to master; thanks.

-- PMM