[libvirt] [PATCH 3/3] qemu: Remove possible NULL deref in debug output

[John Ferlan]

Check for !dev->info.alias was done after a VIR_DEBUG() statement
that already tried to print - just flip sequence

Signed-off-by: John Ferlan <jferlan at redhat.com>
---
 src/qemu/qemu_hotplug.c | 24 ++++++++++--------------
 1 file changed, 10 insertions(+), 14 deletions(-)

diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index cf1e4dc..d158a73 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -1887,14 +1887,14 @@ int qemuDomainChangeNetLinkState(virQEMUDriverPtr driver,
     int ret = -1;
     qemuDomainObjPrivatePtr priv = vm->privateData;
 
-    VIR_DEBUG("dev: %s, state: %d", dev->info.alias, linkstate);
-
     if (!dev->info.alias) {
         virReportError(VIR_ERR_OPERATION_FAILED, "%s",
                        _("can't change link state: device alias not found"));
         return -1;
     }
 
+    VIR_DEBUG("dev: %s, state: %d", dev->info.alias, linkstate);
+
     qemuDomainObjEnterMonitor(driver, vm);
 
     ret = qemuMonitorSetLink(priv->mon, dev->info.alias, linkstate);
@@ -3323,8 +3323,7 @@ qemuDomainDetachHostUSBDevice(virQEMUDriverPtr driver,
 }
 
 static int
-qemuDomainDetachHostSCSIDevice(virConnectPtr conn ATTRIBUTE_UNUSED,
-                               virQEMUDriverPtr driver,
+qemuDomainDetachHostSCSIDevice(virQEMUDriverPtr driver,
                                virDomainObjPtr vm,
                                virDomainHostdevDefPtr detach)
 {
@@ -3358,8 +3357,7 @@ qemuDomainDetachHostSCSIDevice(virConnectPtr conn ATTRIBUTE_UNUSED,
 }
 
 static int
-qemuDomainDetachThisHostDevice(virConnectPtr conn,
-                               virQEMUDriverPtr driver,
+qemuDomainDetachThisHostDevice(virQEMUDriverPtr driver,
                                virDomainObjPtr vm,
                                virDomainHostdevDefPtr detach)
 {
@@ -3373,7 +3371,7 @@ qemuDomainDetachThisHostDevice(virConnectPtr conn,
         ret = qemuDomainDetachHostUSBDevice(driver, vm, detach);
         break;
     case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI:
-        ret = qemuDomainDetachHostSCSIDevice(conn, driver, vm, detach);
+        ret = qemuDomainDetachHostSCSIDevice(driver, vm, detach);
         break;
     default:
         virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
@@ -3396,8 +3394,7 @@ qemuDomainDetachThisHostDevice(virConnectPtr conn,
 }
 
 /* search for a hostdev matching dev and detach it */
-int qemuDomainDetachHostDevice(virConnectPtr conn,
-                               virQEMUDriverPtr driver,
+int qemuDomainDetachHostDevice(virQEMUDriverPtr driver,
                                virDomainObjPtr vm,
                                virDomainDeviceDefPtr dev)
 {
@@ -3466,14 +3463,13 @@ int qemuDomainDetachHostDevice(virConnectPtr conn,
      * function so that mac address / virtualport are reset
      */
     if (detach->parent.type == VIR_DOMAIN_DEVICE_NET)
-        return qemuDomainDetachNetDevice(conn, driver, vm, &detach->parent);
+        return qemuDomainDetachNetDevice(driver, vm, &detach->parent);
     else
-        return qemuDomainDetachThisHostDevice(conn, driver, vm, detach);
+        return qemuDomainDetachThisHostDevice(driver, vm, detach);
 }
 
 int
-qemuDomainDetachNetDevice(virConnectPtr conn,
-                          virQEMUDriverPtr driver,
+qemuDomainDetachNetDevice(virQEMUDriverPtr driver,
                           virDomainObjPtr vm,
                           virDomainDeviceDefPtr dev)
 {
@@ -3489,7 +3485,7 @@ qemuDomainDetachNetDevice(virConnectPtr conn,
 
     if (virDomainNetGetActualType(detach) == VIR_DOMAIN_NET_TYPE_HOSTDEV) {
         /* coverity[negative_returns] */
-        ret = qemuDomainDetachThisHostDevice(conn, driver, vm,
+        ret = qemuDomainDetachThisHostDevice(driver, vm,
                                              virDomainNetGetActualHostdev(detach));
         goto cleanup;
     }
-- 
1.9.3