diff --git a/src/xcb_conn.c b/src/xcb_conn.c index ed2153d..1d37614 100644 --- a/src/xcb_conn.c +++ b/src/xcb_conn.c @@ -210,6 +210,14 @@ xcb_connection_t *xcb_connect_to_fd(int fd, xcb_auth_info_t *auth_info) { xcb_connection_t* c; +#ifndef USE_POLL + if(fd >= FD_SETSIZE) /* would overflow in FD_SET */ + { + close(fd); + return (xcb_connection_t *) &error_connection; + } +#endif + c = calloc(1, sizeof(xcb_connection_t)); if(!c) { close(fd);