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

[Cao jin]

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.
-- 
Sincerely,
Cao jin