Re: [Qemu-devel] Reproducible crash on PCIe hotplug

[Stefan Hajnoczi]

On Mon, Dec 12, 2016 at 01:34:05PM +0800, Cao jin wrote:
> 
> 
> On 12/10/2016 04:39 AM, Eduardo Habkost wrote:
> > Using latest qemu.git master:
> > 
> >   $ qemu-system-x86_64 -machine q35 -readconfig docs/q35-chipset.cfg 
> > -monitor stdio
> >   QEMU 2.7.93 monitor - type 'help' for more information
> >   (qemu) device_add e1000e,bus=ich9-pcie-port-4,addr=00
> >   (qemu) device_add e1000e,bus=ich9-pcie-port-4,addr=08
> >   Segmentation fault (core dumped)
> > 
> > It crashes at:
> > 
> >   #7  0x000055555598d7dc in do_pci_register_device (errp=0x7fffffffbfd0, 
> > devfn=64, name=0x5555565df340 "e1000e", bus=0x555558487380, 
> > pci_dev=0x5555589cd000)
> >       at /home/ehabkost/rh/proj/virt/qemu/hw/pci/pci.c:983
> >   983             error_setg(errp, "PCI: slot %d function 0 already 
> > ocuppied by %s,"
> >   (gdb) l
> >   978                        PCI_SLOT(devfn), PCI_FUNC(devfn), name,
> >   979                        bus->devices[devfn]->name);
> >   980             return NULL;
> >   981         } else if (dev->hotplugged &&
> >   982                    pci_get_function_0(pci_dev)) {
> >   983             error_setg(errp, "PCI: slot %d function 0 already 
> > ocuppied by %s,"
> >   984                        " new func %s cannot be exposed to guest.",
> >   985                        PCI_SLOT(devfn),
> >   986                        bus->devices[PCI_DEVFN(PCI_SLOT(devfn), 
> > 0)]->name,
> >   987                        name);
> > 
> 
> Thanks for informing me. I am kind of busy for now, so I suppose I will
> investigate it after 2.8 release.

Please let me know if this should be considered a release blocker.

The proposed QEMU 2.8 release date is tomorrow (December 13th)!

Stefan

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