[libvirt] [PATCH] Don't free an uninitalized pointer in update_driver_name()

[Matthias Bolte <matthias.bolte@xxxxxxxxxxxxxx>]

This invalid free results in heap corruption. Some symptoms I saw
because of this were libvirtd crashing and virt-manager hanging
while trying to enumerate devices.
---
 src/node_device/node_device_driver.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/node_device/node_device_driver.c b/src/node_device/node_device_driver.c
index ecbac0f..fbadfca 100644
--- a/src/node_device/node_device_driver.c
+++ b/src/node_device/node_device_driver.c
@@ -78,7 +78,7 @@ static int update_driver_name(virConnectPtr conn,
                               virNodeDeviceObjPtr dev)
 {
     char *driver_link = NULL;
-    char *devpath;
+    char *devpath = NULL;
     char *p;
     int ret = -1;
 
@@ -114,7 +114,7 @@ static int update_driver_name(virConnectPtr conn,
 
 cleanup:
     VIR_FREE(driver_link);
-    free(devpath);
+    VIR_FREE(devpath);
     return ret;
 }
 #else
-- 
1.6.0.4

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