Fixed crash on win32 in case of negative size

diff --git a/main/streams/plain_wrapper.c b/main/streams/plain_wrapper.c
index 877b605a7d8baac6e154ae90517bbd5d8929deda..cf5858aac039e1919400e1b55be1d6819707c520 100644 (file)
--- a/main/streams/plain_wrapper.c
+++ b/main/streams/plain_wrapper.c
@@ -773,8 +773,13 @@ static int php_stdiop_set_option(php_stream *stream, int option, int value, void
                                case PHP_STREAM_TRUNCATE_SUPPORTED:
                                        return fd == -1 ? PHP_STREAM_OPTION_RETURN_ERR : PHP_STREAM_OPTION_RETURN_OK;
 
-                               case PHP_STREAM_TRUNCATE_SET_SIZE:
-                                       return ftruncate(fd, *(ptrdiff_t*)ptrparam) == 0 ? PHP_STREAM_OPTION_RETURN_OK : PHP_STREAM_OPTION_RETURN_ERR;
+                               case PHP_STREAM_TRUNCATE_SET_SIZE: {
+                                       ptrdiff_t new_size = *(ptrdiff_t*)ptrparam;
+                                       if (new_size < 0) {
+                                               return PHP_STREAM_OPTION_RETURN_ERR;
+                                       }
+                                       return ftruncate(fd, new_size) == 0 ? PHP_STREAM_OPTION_RETURN_OK : PHP_STREAM_OPTION_RETURN_ERR;
+                               }
                        }
                        
                default: