From ee591240c2074ab905a4f9bf0db2bb40fc10bc85 Mon Sep 17 00:00:00 2001
From: Peter Krempa <pkrempa@redhat.com>
Date: Tue, 14 Apr 2015 15:26:36 +0200
Subject: [PATCH] qemu: monitor: Ensure that qemuMonitorSetLink is called with
 non-null name

---
 src/qemu/qemu_monitor.c | 6 +++---
 src/qemu/qemu_monitor.h | 3 ++-
 src/qemu/qemu_process.c | 6 ++++++
 3 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 6a6ccf932c..b49ed3da26 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -1672,11 +1672,11 @@ qemuMonitorSetLink(qemuMonitorPtr mon,
                    virDomainNetInterfaceLinkState state)
 {
     int ret;
-    VIR_DEBUG("mon=%p, name=%p:%s, state=%u", mon, name, name, state);
+    VIR_DEBUG("mon=%p, name=%s, state=%u", mon, name, state);
 
-    if (!mon || !name) {
+    if (!mon) {
         virReportError(VIR_ERR_INVALID_ARG, "%s",
-                       _("monitor || name must not be NULL"));
+                       _("monitor must not be NULL"));
         return -1;
     }
 
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index d673154f82..999af10d5e 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -233,7 +233,8 @@ int qemuMonitorSetCapabilities(qemuMonitorPtr mon);
 
 int qemuMonitorSetLink(qemuMonitorPtr mon,
                        const char *name,
-                       virDomainNetInterfaceLinkState state);
+                       virDomainNetInterfaceLinkState state)
+    ATTRIBUTE_NONNULL(2);
 
 /* These APIs are for use by the internal Text/JSON monitor impl code only */
 char *qemuMonitorNextCommandID(qemuMonitorPtr mon);
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index d9611c9ac7..276837e505 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -2355,6 +2355,12 @@ qemuProcessSetLinkStates(virDomainObjPtr vm)
 
     for (i = 0; i < def->nnets; i++) {
         if (def->nets[i]->linkstate == VIR_DOMAIN_NET_INTERFACE_LINK_STATE_DOWN) {
+            if (!def->nets[i]->info.alias) {
+                virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                               _("missing alias for network device"));
+                return -1;
+            }
+
             VIR_DEBUG("Setting link state: %s", def->nets[i]->info.alias);
 
             if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_NETDEV)) {
-- 
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