[libvirt] [PATCH 4/6] domain_conf: Check errors from virSocketAddrFormat

[John Ferlan]

Commit id's 'c9a641f1e' and 'aa2cc721' added calls to virSocketAddrFormat
but did not check for a NULL (error) return which could lead to bad output
in the XML file.  Need to check for NULL return and cause failure.

Signed-off-by: John Ferlan <jferlan at redhat.com>
---
 src/conf/domain_conf.c | 29 +++++++++++++++++++++--------
 1 file changed, 21 insertions(+), 8 deletions(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index b53cb8d..ef517b4 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -17254,7 +17254,7 @@ virDomainFSDefFormat(virBufferPtr buf,
     return 0;
 }
 
-static void
+static int
 virDomainNetIpsFormat(virBufferPtr buf, virDomainNetIpDefPtr *ips, size_t nips)
 {
     size_t i;
@@ -17264,6 +17264,9 @@ virDomainNetIpsFormat(virBufferPtr buf, virDomainNetIpDefPtr *ips, size_t nips)
         virSocketAddrPtr address = &ips[i]->address;
         char *ipStr = virSocketAddrFormat(address);
         const char *familyStr = NULL;
+
+        if (!ipStr)
+            return -1;
         if (VIR_SOCKET_ADDR_IS_FAMILY(address, AF_INET6))
             familyStr = "ipv6";
         else if (VIR_SOCKET_ADDR_IS_FAMILY(address, AF_INET))
@@ -17277,9 +17280,10 @@ virDomainNetIpsFormat(virBufferPtr buf, virDomainNetIpDefPtr *ips, size_t nips)
             virBufferAsprintf(buf, " prefix='%u'", ips[i]->prefix);
         virBufferAddLit(buf, "/>\n");
     }
+    return 0;
 }
 
-static void
+static int
 virDomainNetRoutesFormat(virBufferPtr buf,
                          virDomainNetRouteDefPtr *routes,
                          size_t nroutes)
@@ -17292,6 +17296,8 @@ virDomainNetRoutesFormat(virBufferPtr buf,
         char *via = virSocketAddrFormat(&route->via);
         char *to = NULL;
 
+        if (!via)
+            return -1;
         if (VIR_SOCKET_ADDR_IS_FAMILY(&route->via, AF_INET6))
             familyStr = "ipv6";
         else if (VIR_SOCKET_ADDR_IS_FAMILY(&route->via, AF_INET))
@@ -17301,6 +17307,8 @@ virDomainNetRoutesFormat(virBufferPtr buf,
 
         if (VIR_SOCKET_ADDR_VALID(&route->to)) {
             to = virSocketAddrFormat(&route->to);
+            if (!to)
+                return -1;
             virBufferAsprintf(buf, " address='%s'", to);
             VIR_FREE(to);
         }
@@ -17310,6 +17318,7 @@ virDomainNetRoutesFormat(virBufferPtr buf,
 
         virBufferAddLit(buf, "/>\n");
     }
+    return 0;
 }
 
 static int
@@ -17465,10 +17474,12 @@ virDomainHostdevDefFormatCaps(virBufferPtr buf,
     virBufferAddLit(buf, "</source>\n");
 
     if (def->source.caps.type == VIR_DOMAIN_HOSTDEV_CAPS_TYPE_NET) {
-        virDomainNetIpsFormat(buf, def->source.caps.u.net.ips,
-                              def->source.caps.u.net.nips);
-        virDomainNetRoutesFormat(buf, def->source.caps.u.net.routes,
-                                 def->source.caps.u.net.nroutes);
+        if (virDomainNetIpsFormat(buf, def->source.caps.u.net.ips,
+                                  def->source.caps.u.net.nips) < 0)
+            return -1;
+        if (virDomainNetRoutesFormat(buf, def->source.caps.u.net.routes,
+                                     def->source.caps.u.net.nroutes) < 0)
+            return -1;
     }
 
     return 0;
@@ -17857,8 +17868,10 @@ virDomainNetDefFormat(virBufferPtr buf,
             return -1;
     }
 
-    virDomainNetIpsFormat(buf, def->ips, def->nips);
-    virDomainNetRoutesFormat(buf, def->routes, def->nroutes);
+    if (virDomainNetIpsFormat(buf, def->ips, def->nips) < 0)
+        return -1;
+    if (virDomainNetRoutesFormat(buf, def->routes, def->nroutes) < 0)
+        return -1;
 
     virBufferEscapeString(buf, "<script path='%s'/>\n",
                           def->script);
-- 
2.1.0