The LXC controller itself needs to mknod the USB device node in /dev/bus/usb, so we can't block mknod permission from the cgroup. Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com&gt; --- src/lxc/lxc_cgroup.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/lxc/lxc_cgroup.c b/src/lxc/lxc_cgroup.c index 1ae3906..c641132 100644 --- a/src/lxc/lxc_cgroup.c +++ b/src/lxc/lxc_cgroup.c @@ -325,7 +325,7 @@ virLXCSetupHostUSBDeviceCgroup(virUSBDevicePtr dev ATTRIBUTE_UNUSED, VIR_DEBUG("Process path '%s' for USB device", path); if (virCgroupAllowDevicePath(cgroup, path, - VIR_CGROUP_DEVICE_RW) < 0) + VIR_CGROUP_DEVICE_RWM) < 0) return -1; return 0; @@ -341,7 +341,7 @@ virLXCTeardownHostUSBDeviceCgroup(virUSBDevicePtr dev ATTRIBUTE_UNUSED, VIR_DEBUG("Process path '%s' for USB device", path); if (virCgroupDenyDevicePath(cgroup, path, - VIR_CGROUP_DEVICE_RW) < 0) + VIR_CGROUP_DEVICE_RWM) < 0) return -1; return 0;