Re: [PATCH for-8.0 0/5] Xen emulation build/Coverity fixes

[Peter Maydell <peter.maydell@xxxxxxxxxx>]

On Wed, 12 Apr 2023 at 20:01, David Woodhouse <dwmw2@xxxxxxxxxxxxx> wrote:
>
> On Wed, 2023-04-12 at 19:55 +0100, Peter Maydell wrote:
> > On Wed, 12 Apr 2023 at 19:52, David Woodhouse <dwmw2@xxxxxxxxxxxxx> wrote:
> > >
> > > Some Coverity fixes and minor cleanups. And most notably, dropping
> > > support for Xen libraries older than 4.7.1.
> > >
> > > I believe there are two issues that remain to be fixed. The x32 build
> > > fails, and I've seen patches which attempt to detect x32 and disable
> > > the Xen emulation. Along with assertions that we just shouldn't care.
> > > I don't have a strong opinion either way but it seems to be in hand.
> > >
> > > The other is the question of what Xen *actually* does if you try to
> > > unmap an IRQ_MSI_EMU PIRQ. I don't think Linux guests try that, and
> > > I'm fairly sure Windows doesn't even use MSI→PIRQ mappings in the
> > > first place, and I doubt any other guests care either. I'd like to
> > > establish the 'correct' behaviour and implement it, ideally before
> > > the 8.0 release, but it's going to take me a few days more.
> > >
> > > David Woodhouse (5):
> > >       hw/xen: Simplify emulated Xen platform init
> > >       hw/xen: Fix memory leak in libxenstore_open() for Xen
> > >       xen: Drop support for Xen versions below 4.7.1
> > >       hw/xen: Fix double-free in xen_console store_con_info()
> > >       hw/xen: Fix broken check for invalid state in xs_be_open()
> > >
> >
> > This is highly unlikely to make 8.0 at this point, FYI.
> > If there's anything in this you think is super-critical we
> > might be able to sneak it in.
>
> Nothing is super-critical except maybe the double-free in
> store_con_info(). That could lead to a crash on startup if the QEMU Xen
> console is being used.

I've cherry-picked that double-free patch to apply for 8.0; thanks.

-- PMM