From 80b077ee5ea0dd899b87d370f9fa892e727832f5 Mon Sep 17 00:00:00 2001
From: Roopa Prabhu <roprabhu@cisco.com>
Date: Fri, 14 Oct 2011 13:41:46 -0700
Subject: [PATCH] macvtap: avoid invalid free

Commit 0472f39 plugged a leak, but introduced another bug:

Actually looks like physfndev is conditionally allocated in getPhysfnDev
Its better to modify getPhysfnDev to allocate physfndev every time.
---
 src/util/macvtap.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/util/macvtap.c b/src/util/macvtap.c
index a020c9058b..7fd6eb54b9 100644
--- a/src/util/macvtap.c
+++ b/src/util/macvtap.c
@@ -964,7 +964,11 @@ getPhysfnDev(const char *linkdev,
          */
 
         *vf = PORT_SELF_VF;
-        *physfndev = (char *)linkdev;
+        *physfndev = strdup(linkdev);
+        if (!*physfndev) {
+            virReportOOMError();
+            rc = -1;
+        }
     }
 
     return rc;