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Re: [Qemu-devel] [Regression] hmp: QEMU crash on device_del auto-complet
From: |
Marcel Apfelbaum |
Subject: |
Re: [Qemu-devel] [Regression] hmp: QEMU crash on device_del auto-completion |
Date: |
Tue, 25 Nov 2014 16:23:24 +0200 |
On Tue, 2014-11-25 at 09:12 -0500, Luiz Capitulino wrote:
> On Tue, 25 Nov 2014 16:04:19 +0200
> Marcel Apfelbaum <address@hidden> wrote:
>
> > Hi,
> >
> > The commits:
> > - 6a1fa9f5 (monitor: add del completion for peripheral device)
> > - 66e56b13 (qdev: add qdev_build_hotpluggable_device_list helper)
> >
> > cause a QEMU crash when trying to use HMP device_del auto-completion.
> > It can be easily reproduced by:
> > <qemu-bin> -enable-kvm ~/images/fedora.qcow2 -monitor stdio -device
> > virtio-net-pci,id=vnet
> > (qemu) device_del
> > /home/mapfelba/git/upstream/qemu/hw/core/qdev.c:941:qdev_build_hotpluggable_device_list:
> > Object 0x7f6ce04e4fe0 is not an instance of type device
> > Aborted (core dumped)
> >
> > The root cause is qdev_build_hotpluggable_device_list going recursively over
> > all peripherals and their children assuming all are devices. It doesn't work
> > since PCI devices have at least on child which is a memory region (bus
> > master).
> >
> > Should we try to fix it for 2.2 or simply revert it?
>
> Do you think you can post a patch in the next few days? If you can then
> let's try to fix it, otherwise we better revert those commits.
I'll try, sure.
Thanks,
Marcel