[libvirt] [PATCH 1/4] Set the number of elements to 0 in virNetwork*Clear

[Ján Tomko]

Leaving it at -1 causes invalid free in virNetworkDefUpdateDNSHost
if virNetworkDNSHostDefParseXML fails and virNetworkDNSHostDefClear
gets called twice.
---
 src/conf/network_conf.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/conf/network_conf.c b/src/conf/network_conf.c
index d616e12..e3e0e89 100644
--- a/src/conf/network_conf.c
+++ b/src/conf/network_conf.c
@@ -136,6 +136,7 @@ virNetworkIpDefClear(virNetworkIpDefPtr def)
 
     while (def->nhosts--)
         virNetworkDHCPHostDefClear(&def->hosts[def->nhosts]);
+    def->nhosts = 0;
 
     VIR_FREE(def->hosts);
     VIR_FREE(def->tftproot);
@@ -161,6 +162,7 @@ virNetworkDNSHostDefClear(virNetworkDNSHostDefPtr def)
     while (def->nnames--)
         VIR_FREE(def->names[def->nnames]);
     VIR_FREE(def->names);
+    def->nnames = 0;
 }
 
 static void
@@ -190,6 +192,7 @@ virNetworkDNSDefClear(virNetworkDNSDefPtr def)
             virNetworkDNSSrvDefClear(&def->srvs[def->nsrvs]);
         VIR_FREE(def->srvs);
     }
+    def->ntxts = def->nhosts = def->nsrvs = 0;
 }
 
 static void
@@ -206,6 +209,7 @@ virNetworkForwardDefClear(virNetworkForwardDefPtr def)
         virNetworkForwardIfDefClear(&def->ifs[i]);
     }
     VIR_FREE(def->ifs);
+    def->nifs = def->npfs = 0;
 }
 
 void
-- 
1.8.1.5