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conf: report an error message for non-existing USB hubs

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If any of the devices referenced a USB hub that does not exist,
defining the domain would either fail with:
error: An error occurred, but the cause is unknown
(if only the last hub in the path is missing)
or crash.

Return a proper error instead of crashing.

https://bugzilla.redhat.com/show_bug.cgi?id=1367130
This commit is contained in:
Ján Tomko 2016-08-15 17:39:35 +02:00
parent d49f6853b3
commit ef66bd5df8
3 changed files with 30 additions and 0 deletions

8
src/conf/domain_addr.c

@ -1539,6 +1539,14 @@ virDomainUSBAddressFindPort(virDomainUSBAddressSetPtr addrs,
return NULL;
}
hub = hub->ports[portIdx];
if (!hub) {
virReportError(VIR_ERR_XML_ERROR,
_("there is no hub at port %u in USB address bus: %u port: %s"),
info->addr.usb.port[i],
info->addr.usb.bus,
portStr);
return NULL;
}
}
*targetIdx = info->addr.usb.port[lastIdx] - 1;

19
tests/qemuxml2argvdata/qemuxml2argv-usb-hub-nonexistent.xml Normal file

@ -0,0 +1,19 @@
<domain type='qemu'>
<name>QEMUGuest1</name>
<uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
<memory unit='KiB'>219136</memory>
<currentMemory unit='KiB'>219136</currentMemory>
<vcpu placement='static'>1</vcpu>
<os>
<type arch='i686' machine='pc'>hvm</type>
<boot dev='hd'/>
</os>
<devices>
<emulator>/usr/bin/qemu</emulator>
<controller type='usb' index='0'/>
<memballoon model='virtio'/>
<input type='mouse' bus='usb'>
<address type='usb' bus='0' port='1.2.3'/>
</input>
</devices>
</domain>

3
tests/qemuxml2argvtest.c

@ -1204,6 +1204,9 @@ mymain(void)
DO_TEST_PARSE_ERROR("usb-hub-conflict",
QEMU_CAPS_CHARDEV, QEMU_CAPS_USB_HUB,
QEMU_CAPS_NODEFCONFIG);
DO_TEST_PARSE_ERROR("usb-hub-nonexistent",
QEMU_CAPS_CHARDEV, QEMU_CAPS_USB_HUB,
QEMU_CAPS_NODEFCONFIG);
DO_TEST("usb-port-missing",
QEMU_CAPS_CHARDEV, QEMU_CAPS_USB_HUB,
QEMU_CAPS_NODEFCONFIG);