[libvirt] [PATCH] openvz_conf.c: don't dereference NULL upon failure

[Jim Meyering]

"dom" is set to NULL within the while loop:

        virDomainObjUnlock(dom);
        dom = NULL;

If on a subsequent iteration something fails,
we goto "cleanup" or "no_memory", both of which
have us run this code:

    fclose(fp);
    virDomainObjUnref(dom);
    return -1;

And the virDomainObjUnref function would dereference "dom".


>From 3971ff17c7e9f1ddbc443d48b86fe6ba60a2d4a0 Mon Sep 17 00:00:00 2001
From: Jim Meyering <meyering at redhat.com>
Date: Tue, 15 Dec 2009 16:16:57 +0100
Subject: [PATCH] openvz_conf.c: don't dereference NULL upon failure

* src/openvz/openvz_conf.c (openvzLoadDomains): Avoid NULL deref
of "dom".
---
 src/openvz/openvz_conf.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/src/openvz/openvz_conf.c b/src/openvz/openvz_conf.c
index 7e9abbf..43bbaf2 100644
--- a/src/openvz/openvz_conf.c
+++ b/src/openvz/openvz_conf.c
@@ -535,7 +535,8 @@ int openvzLoadDomains(struct openvz_driver *driver) {

  cleanup:
     fclose(fp);
-    virDomainObjUnref(dom);
+    if (dom)
+        virDomainObjUnref(dom);
     return -1;
 }

--
1.6.6.rc2.275.g51e2d