[libvirt] [PATCH] lxc_container: Don't dereference NULL upon failure (x2)

[Jim Meyering]

Spotted these while skimming through all VIR_FREE uses.

>From af9e606d97e8321683ba765ba0a4af4c065d3b4b Mon Sep 17 00:00:00 2001
From: Jim Meyering <meyering at redhat.com>
Date: Wed, 4 Feb 2009 18:44:34 +0100
Subject: [PATCH] lxc_container: Don't dereference NULL upon failure

* src/lxc_container.c (lxcContainerPivotRoot): Free and zero
oldroot *after* printing the diagnostic, both for virFileMakePath
and pivot_root failure.
---
 src/lxc_container.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/lxc_container.c b/src/lxc_container.c
index ea52eed..90c70d5 100644
--- a/src/lxc_container.c
+++ b/src/lxc_container.c
@@ -284,20 +284,20 @@ static int lxcContainerPivotRoot(virDomainFSDefPtr root)
     }

     if ((rc = virFileMakePath(oldroot)) < 0) {
-        VIR_FREE(oldroot);
         virReportSystemError(NULL, rc,
                              _("failed to create %s"),
                              oldroot);
+        VIR_FREE(oldroot);
         return -1;
     }

     /* The old root directory will live at /.oldroot after
      * this and will soon be unmounted completely */
     if (pivot_root(root->src, oldroot) < 0) {
-        VIR_FREE(oldroot);
         virReportSystemError(NULL, errno,
                              _("failed to pivot root %s to %s"),
                              oldroot, root->src);
+        VIR_FREE(oldroot);
         return -1;
     }
     VIR_FREE(oldroot);
@@ -677,4 +677,3 @@ int lxcContainerAvailable(int features)

     return 0;
 }
-
--
1.6.1.2.467.g081e7