Re: [REGRESSION] kernel NULL pointer dereference in xen-balloon with mem hotplug

["Marek Marczykowski-Górecki" <marmarek@invisiblethingslab.com>]

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On Fri, Sep 06, 2024 at 12:30:03PM +0200, Linux regression tracking (Thorsten Leemhuis) wrote:
> On 08.08.24 12:31, Marek Marczykowski-Górecki wrote:
> > 
> > When testing Linux 6.11-rc2, I've got the crash like below. It's a PVH
> > guest started with 400MB memory, and then extended via mem hotplug (I
> > don't know to what exact size it was at this time, but up to 4GB), it
> > was quite early in the domU boot process, I suspect it could be the
> > first mem hotplug even happening there.
> > Unfortunately I don't have reliable reproducer, it crashed only once
> > over several test runs. I don't remember seeing such crash before, so it
> > looks like a regression in 6.11. I'm not sure if that matters, but it's
> > on ADL, very similar to the qubes-hw2 gitlab runner.
> 
> Marek, did this happen again or do things appear to be resolved? Asking
> because I'm tracking this as a regression.

I haven't investigated it more, and also haven't ran any later tests on
6.11, so I don't know if it's still there, but I suspect it might be.

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab

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