Public bug reported:
Libvirt-aa-helper seems to have a bug when adding usb passthrough
devices statically.
On hotplug with:
$ cat sandisk-usb.xml
<hostdev mode='subsystem' type='usb' managed='yes'>
<source>
<!--
idVendor 0x0781 SanDisk Corp.
idProduct 0x5580 SDCZ80 Flash Drive
-->
<vendor id='0x0781'/>
<product id='0x5580'/>
</source>
</hostdev>
$ virsh attach-device z-test1 sandisk-usb.xml
It generates correctly:
"/dev/bus/usb/003/003" rw,
But if adding the same XML part to the guest xml itself it generates:
"/dev/bus/usb/000/000" rw,
And as a follow on issue the guest start fails with:
libusb: error [_get_usbfs_fd] libusb couldn't open USB device
/dev/bus/usb/003/003: Permission denied
Due to:
apparmor="DENIED" operation="open"
profile="libvirt-adc578cb-905f-41fc-9be2-9fb81f6a6073"
name="/dev/bus/usb/003/003" pid=22879 comm="qemu-system-x86"
requested_mask="wr" denied_mask="wr" fsuid=123 ouid=123
** Affects: libvirt (Ubuntu)
Importance: Medium
Status: Triaged
** Tags: server-next virt-aa-helper
** Changed in: libvirt (Ubuntu)
Status: New => Triaged
** Changed in: libvirt (Ubuntu)
Importance: Undecided => Medium
** Tags added: server-next
** Tags added: virt-aa-helper
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https://bugs.launchpad.net/bugs/1686324
Title:
usb hostdev passthrough generates the wrong apparmor rules
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