[libvirt] [v0.9.12-maint 9/9] Fix crash in remoteDispatchDomainMemoryStats (CVE-2013-4296)

[Eric Blake]

From: "Daniel P. Berrange" <berrange at redhat.com>

The 'stats' variable was not initialized to NULL, so if some
early validation of the RPC call fails, it is possible to jump
to the 'cleanup' label and VIR_FREE an uninitialized pointer.
This is a security flaw, since the API can be called from a
readonly connection which can trigger the validation checks.

This was introduced in release v0.9.1 onwards by

  commit 158ba8730e44b7dd07a21ab90499996c5dec080a
  Author: Daniel P. Berrange <berrange at redhat.com>
  Date:   Wed Apr 13 16:21:35 2011 +0100

    Merge all returns paths from dispatcher into single path

Signed-off-by: Daniel P. Berrange <berrange at redhat.com>
(cherry picked from commit e7f400a110e2e3673b96518170bfea0855dd82c0)

Conflicts:
	daemon/remote.c - context
---
 daemon/remote.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/daemon/remote.c b/daemon/remote.c
index 2cdb079..f127eaa 100644
--- a/daemon/remote.c
+++ b/daemon/remote.c
@@ -1061,7 +1061,7 @@ remoteDispatchDomainMemoryStats(virNetServerPtr server ATTRIBUTE_UNUSED,
                                 remote_domain_memory_stats_ret *ret)
 {
     virDomainPtr dom = NULL;
-    struct _virDomainMemoryStat *stats;
+    struct _virDomainMemoryStat *stats = NULL;
     int nr_stats, i;
     int rv = -1;
     struct daemonClientPrivate *priv =
-- 
1.8.3.1