kvm segmentation fault on pci-hotplug add/del/re-add

Hi,

running kvm 0.11.0 from http://www.corpit.ru/debian/tls/ on debian lenny host, guest also debian lenny (with virtio and pci_hotplug, 2.6.30)

Starting the guest with:
/usr/bin/kvm -name test -vnc :5 -net nic,vlan=0,model=virtio,macaddr=00:08:15:00:09:95 -net tap,vlan=0,ifname=tap05,script=no -m 256 -drive file=/vsimages/test/test.raw,if=virtio,boot=on -monitor tcp:127.0.0.1:33333,server,nowait -vga std -k de -tdf

1. Adding hdd

On qemu-console:
pci_add auto storage file=test2.raw,if=virtio
OK domain 0, bus 0, slot 6, function 0

In guest:
pci 0000:00:06.0: reg 10 io port: [0x00-0x3ff]
pci 0000:00:02.0: BAR 6: bogus alignment [0x0-0x0] flags 0x2
decode_hpp: Could not get hotplug parameters. Use defaults virtio-pci 0000:00:06.0: enabling device (0000 -> 0001)
ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 11
virtio-pci 0000:00:06.0: PCI INT A -> Link[LNKB] -> GSI 11 (level, high) -> IRQ 11
vdb: vdb1

2. Deleting hdd

On qemu-console: pci_del 0:6
In guest: virtio-pci 0000:00:06.0: PCI INT A disabled

3. Re-adding the same hdd fails

qemu-console: pci_add auto storage file=test2.raw,if=virtio
host: Segmentation fault

Running with gdb gives:
dbg:
Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fc15550a6e0 (LWP 9085)] virtio_blk_init (dev=0xcb2010)

    at /build/kvm/qemu-kvm-0.11.0/build/hw/virtio-blk.c:439
439     /build/kvm/qemu-kvm-0.11.0/build/hw/virtio-blk.c: No such file or
directory.
        in /build/kvm/qemu-kvm-0.11.0/build/hw/virtio-blk.c

Is this problem known?
Is pci-hotplug a qemu or kvm feature?
Where to file a bug?

Regards
Thomas