virDomainDeviceSpaprVioAddressParseXML: Use virXMLProp*

This strictens the parser to disallow negative values (interpreted as
`ULLONG_MAX + value + 1`) for attribute `reg`. Allowing negative
numbers to be interpreted this way makes no sense for this attribute, as it
refers to a 32 bit address space.

Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

diff --git a/src/conf/device_conf.c b/src/conf/device_conf.c
index 034f072df4ff54414e0bfbf85b811e756bc3dd8a..e587d90c59dd330da4f59da7a4a6f070d073f7f7 100644 (file)
--- a/src/conf/device_conf.c
+++ b/src/conf/device_conf.c
@@ -417,19 +417,17 @@ int
 virDomainDeviceSpaprVioAddressParseXML(xmlNodePtr node,
                                       virDomainDeviceSpaprVioAddress *addr)
 {
-    g_autofree char *reg = virXMLPropString(node, "reg");
+    int reg;
 
     memset(addr, 0, sizeof(*addr));
 
-    if (reg) {
-        if (virStrToLong_ull(reg, NULL, 16, &addr->reg) < 0) {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("Cannot parse <address> 'reg' attribute"));
-            return -1;
-        }
+    if ((reg = virXMLPropULongLong(node, "reg", 16, VIR_XML_PROP_NONE,
+                                   &addr->reg)) < 0)
+        return -1;
 
+    if (reg != 0)
         addr->has_reg = true;
-    }
+
     return 0;
 }