[libvirt] [PATCH] qemu: Check driver is initialized up front, to avoid segfault.

[Cole Robinson]

If the qemu_driver was not initialized (possibly due to an error on driver
startup), we can segfault if attempting to connect to the URI.

Signed-off-by: Cole Robinson <crobinso at redhat.com>
---
 src/qemu_driver.c |   14 ++++++--------
 1 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/src/qemu_driver.c b/src/qemu_driver.c
index 95ea882..a9b4850 100644
--- a/src/qemu_driver.c
+++ b/src/qemu_driver.c
@@ -1779,6 +1779,12 @@ static virDrvOpenStatus qemudOpen(virConnectPtr conn,
         if (conn->uri->server != NULL)
             return VIR_DRV_OPEN_DECLINED;
 
+        if (qemu_driver == NULL) {
+            qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s",
+                             _("qemu state driver is not active"));
+            return VIR_DRV_OPEN_ERROR;
+        }
+
         if (qemu_driver->privileged) {
             if (STRNEQ (conn->uri->path, "/system") &&
                 STRNEQ (conn->uri->path, "/session")) {
@@ -1795,14 +1801,6 @@ static virDrvOpenStatus qemudOpen(virConnectPtr conn,
                 return VIR_DRV_OPEN_ERROR;
             }
         }
-
-        /* URI was good, but driver isn't active */
-        if (qemu_driver == NULL) {
-            qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s",
-                             _("qemu state driver is not active"));
-            return VIR_DRV_OPEN_ERROR;
-        }
-
     }
     conn->privateData = qemu_driver;
 
-- 
1.6.0.6