Validate the bios_date format for <sysinfo>

Add incorrectly formatted bios_date validation test

src/conf/domain_conf.c

@@ -8465,6 +8465,29 @@ virSysinfoParseXML(const xmlNodePtr node,
         virXPathString("string(bios/entry[@name='version'])", ctxt);
     def->bios_date =
         virXPathString("string(bios/entry[@name='date'])", ctxt);
+    if (def->bios_date != NULL) {
+        char *ptr;
+        int month, day, year;
+
+        /* Validate just the format of the date
+         * Expect mm/dd/yyyy or mm/dd/yy,
+         * where yy must be 00->99 and would be assumed to be 19xx
+         * a yyyy date should be 1900 and beyond
+         */
+        if (virStrToLong_i(def->bios_date, &ptr, 10, &month) < 0 ||
+            *ptr != '/' ||
+            virStrToLong_i(ptr + 1, &ptr, 10, &day) < 0 ||
+            *ptr != '/' ||
+            virStrToLong_i(ptr + 1, &ptr, 10, &year) < 0 ||
+            *ptr != '\0' ||
+            (month < 1 || month > 12) ||
+            (day < 1 || day > 31) ||
+            (year < 0 || (year >= 100 && year < 1900))) {
+            virReportError(VIR_ERR_XML_DETAIL, "%s",
+                           _("Invalid BIOS 'date' format"));
+            goto error;
+        }
+    }
     def->bios_release =
         virXPathString("string(bios/entry[@name='release'])", ctxt);
 

tests/qemuxml2argvdata/qemuxml2argv-smbios-date.xml

+<domain type='qemu'>
+  <name>smbios</name>
+  <uuid>362d1fc1-df7d-193e-5c18-49a71bd1da66</uuid>
+  <memory unit='KiB'>1048576</memory>
+  <currentMemory unit='KiB'>1048576</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <smbios mode="sysinfo"/>
+  </os>
+  <sysinfo type="smbios">
+    <bios>
+      <entry name="date">999/999/123</entry>
+    </bios>
+  </sysinfo>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>restart</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu</emulator>
+  </devices>
+</domain>

tests/qemuxml2argvtest.c

@@ -825,6 +825,7 @@ mymain(void)
 
 
     DO_TEST("smbios", QEMU_CAPS_SMBIOS_TYPE);
+    DO_TEST_PARSE_ERROR("smbios-date", QEMU_CAPS_SMBIOS_TYPE);
 
     DO_TEST("watchdog", NONE);
     DO_TEST("watchdog-device", QEMU_CAPS_DEVICE, QEMU_CAPS_NODEFCONFIG);