[libvirt] [PATCH] Fix leak of iterator in nwfilter instantiate code

[Daniel P. Berrange]

The ebiptablesCreateRuleInstanceIterate creates a
virNWFilterVarCombIterPtr instance and iterates over
it. Unfortunately in doing so, it discards the original
pointer. At the end of the method it will thus effectively
do virNWFilterVarCombIterFree(NULL), which means it will
leak the iterator.

Signed-off-by: Daniel P. Berrange <berrange at redhat.com>
---
 src/nwfilter/nwfilter_ebiptables_driver.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/nwfilter/nwfilter_ebiptables_driver.c b/src/nwfilter/nwfilter_ebiptables_driver.c
index 57c0476..9dbd3ff 100644
--- a/src/nwfilter/nwfilter_ebiptables_driver.c
+++ b/src/nwfilter/nwfilter_ebiptables_driver.c
@@ -2865,14 +2865,14 @@ ebiptablesCreateRuleInstanceIterate(
                              virNWFilterRuleInstPtr res)
 {
     int rc = 0;
-    virNWFilterVarCombIterPtr vciter;
+    virNWFilterVarCombIterPtr vciter, tmp;
 
     /* rule->vars holds all the variables names that this rule will access.
      * iterate over all combinations of the variables' values and instantiate
      * the filtering rule with each combination.
      */
-    vciter = virNWFilterVarCombIterCreate(vars,
-                                          rule->varAccess, rule->nVarAccess);
+    tmp = vciter = virNWFilterVarCombIterCreate(vars,
+                                                rule->varAccess, rule->nVarAccess);
     if (!vciter)
         return -1;
 
@@ -2881,12 +2881,12 @@ ebiptablesCreateRuleInstanceIterate(
                                           nwfilter,
                                           rule,
                                           ifname,
-                                          vciter,
+                                          tmp,
                                           res);
         if (rc < 0)
             break;
-        vciter = virNWFilterVarCombIterNext(vciter);
-    } while (vciter != NULL);
+        tmp = virNWFilterVarCombIterNext(tmp);
+    } while (tmp != NULL);
 
     virNWFilterVarCombIterFree(vciter);
 
-- 
1.8.5.3