[libvirt] [PATCH] Clear/invalidate partially parsed UUIDs

[Stefan Berger <stefanb linux vnet ibm com>]

Getting paranoid now... Clear possibly partially parsed UUIDs. Question
is whether to do this in the parsing function itself.

Signed-off-by: Stefan Berger <stefanb us ibm com>

---
 src/util/uuid.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

Index: libvirt-acl/src/util/uuid.c
===================================================================
--- libvirt-acl.orig/src/util/uuid.c
+++ libvirt-acl/src/util/uuid.c
@@ -289,14 +289,19 @@ virSetHostUUIDStr(const char *uuid)
         if (!getDMISystemUUID(dmiuuid, sizeof(dmiuuid))) {
             if (!virUUIDParse(dmiuuid, host_uuid))
                 return 0;
+            // clear partially parsed UUID
+            memset(host_uuid, 0x0, sizeof(host_uuid));
         }
 
         if (!virUUIDIsValid(host_uuid))
             return virUUIDGenerate(host_uuid);
     } else {
         rc = virUUIDParse(uuid, host_uuid);
-        if (rc)
+        if (rc) {
+            // clear partially parsed UUID
+            memset(host_uuid, 0x0, sizeof(host_uuid));
             return rc;
+        }
         if (!virUUIDIsValid(host_uuid))
             return EINVAL;
     }