Fixed bug #72498 variant_date_from_timestamp null dereference

Author: weltling

ext/com_dotnet/com_variant.c

@@ -1007,6 +1007,13 @@ PHP_FUNCTION(variant_date_from_timestamp)
 	tzset();
 	ttstamp = timestamp;
 	tmv = localtime(&ttstamp);
+#if ZEND_ENABLE_ZVAL_LONG64
+	/* Invalid after 23:59:59, December 31, 3000, UTC */
+	if (!tmv) {
+		php_error_docref(NULL, E_WARNING, "Invalid timestamp " ZEND_LONG_FMT, timestamp);
+		RETURN_FALSE;
+	}
+#endif
 	memset(&systime, 0, sizeof(systime));
 
 	systime.wDay = tmv->tm_mday;

ext/com_dotnet/tests/bug72498.phpt

@@ -0,0 +1,16 @@
+--TEST--
+Bug #72498 variant_date_from_timestamp null dereference
+--SKIPIF--
+<?php # vim:ft=php
+if (!extension_loaded("com_dotnet")) print "skip COM/.Net support not present";
+if (PHP_INT_SIZE != 8) print  "skip 64-bit only";
+?>
+--FILE--
+<?php
+
+$v1 = PHP_INT_MAX;
+var_dump(variant_date_from_timestamp($v1));
+?>
+--EXPECTF--
+Warning: variant_date_from_timestamp(): Invalid timestamp %d in %sbug72498.php on line %d
+bool(false)