[PATCH 1/6] qemuBuildHostNetProps: Report proper errors for unhandled interface types

VIR_DOMAIN_NET_TYPE_NULL and VIR_DOMAIN_NET_TYPE_VDS are not implemented for the qemu driver but the formatter code in 'qemuBuildHostNetProps' didn't report an error for them and didn't even return from the function when they were encountered. This caused a crash in 'virJSONValueObjectAppendStringPrintf' which does not tolerate NULL JSON object to append to when the unsupported devices were used. Properly report error when unhandled devices are encountered. This also includes the case for VIR_DOMAIN_NET_TYPE_HOSTDEV, but that code path should never be reached. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2175582 Fixes: 6457619d186 Fixes: 0225483adce Signed-off-by: Peter Krempa <pkrempa(a)redhat.com&gt; --- src/qemu/qemu_command.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 4839d45a34..589ec3e639 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -3995,8 +3995,14 @@ qemuBuildHostNetProps(virDomainObj *vm, /* Should have been handled earlier via PCI/USB hotplug code. */ case VIR_DOMAIN_NET_TYPE_NULL: case VIR_DOMAIN_NET_TYPE_VDS: + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("network device type '%s' is not supported by this hypervisor"), + virDomainNetTypeToString(netType)); + return NULL; + case VIR_DOMAIN_NET_TYPE_LAST: - break; + virReportEnumRangeError(virDomainNetType, netType); + return NULL; } if (virJSONValueObjectAppendStringPrintf(netprops, "id", "host%s", net->info.alias) < 0) -- 2.39.2