Fix bug #67492: unserialize() SPL ArrayObject / SPLObjectStorage Type Confusion

Author: smalyshev

ext/spl/spl_array.c

@@ -1804,7 +1804,7 @@ SPL_METHOD(Array, unserialize)
 	++p;
 
 	ALLOC_INIT_ZVAL(pmembers);
-	if (!php_var_unserialize(&pmembers, &p, s + buf_len, &var_hash TSRMLS_CC)) {
+	if (!php_var_unserialize(&pmembers, &p, s + buf_len, &var_hash TSRMLS_CC) || Z_TYPE_P(pmembers) != IS_ARRAY) {
 		zval_ptr_dtor(&pmembers);
 		goto outexcept;
 	}

ext/spl/spl_observer.c

@@ -914,7 +914,7 @@ SPL_METHOD(SplObjectStorage, unserialize)
 	++p;
 
 	ALLOC_INIT_ZVAL(pmembers);
-	if (!php_var_unserialize(&pmembers, &p, s + buf_len, &var_hash TSRMLS_CC)) {
+	if (!php_var_unserialize(&pmembers, &p, s + buf_len, &var_hash TSRMLS_CC) || Z_TYPE_P(pmembers) != IS_ARRAY) {
 		zval_ptr_dtor(&pmembers);
 		goto outexcept;
 	}

ext/spl/tests/SplObjectStorage_unserialize_bad.phpt

@@ -7,6 +7,7 @@ $badblobs = array(
 'x:i:2;i:0;,i:1;;i:0;,i:2;;m:a:0:{}',
 'x:i:3;O:8:"stdClass":0:{},O:8:"stdClass":0:{};R:2;,i:1;;O:8:"stdClass":0:{},r:2;;m:a:0:{}',
 'x:i:3;O:8:"stdClass":0:{},O:8:"stdClass":0:{};r:2;,i:1;;O:8:"stdClass":0:{},r:2;;m:a:0:{}',
+'x:i:1;O:8:"stdClass":0:{},N;;m:s:40:"1234567890123456789012345678901234567890"',
 );
 foreach($badblobs as $blob) {
 try {
@@ -17,6 +18,7 @@ try {
 	echo $e->getMessage()."\n";
 }
 }
+echo "DONE\n";
 --EXPECTF--
 Error at offset 6 of 34 bytes
 Error at offset 46 of 89 bytes
@@ -42,4 +44,5 @@ object(SplObjectStorage)#2 (1) {
     }
   }
 }
-
+Error at offset 79 of 78 bytes
+DONE