From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6986DC35247 for ; Wed, 5 Feb 2020 22:21:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 47F4A2192A for ; Wed, 5 Feb 2020 22:21:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727555AbgBEWVz (ORCPT ); Wed, 5 Feb 2020 17:21:55 -0500 Received: from mail.kernel.org ([198.145.29.99]:41382 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727237AbgBEWVo (ORCPT ); Wed, 5 Feb 2020 17:21:44 -0500 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4D5EB222C2; Wed, 5 Feb 2020 22:21:44 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.93) (envelope-from ) id 1izT3H-001P16-6X; Wed, 05 Feb 2020 17:21:43 -0500 Message-Id: <20200205222143.086800401@goodmis.org> User-Agent: quilt/0.65 Date: Wed, 05 Feb 2020 17:21:13 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , Masami Hiramatsu Subject: [for-next][PATCH 3/5] bootconfig: Add more parse error messages References: <20200205222110.912457436@goodmis.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Masami Hiramatsu Add more error messages for following cases. - Exceeding max number of nodes - Config tree data is empty (e.g. comment only) - Config data is empty or exceeding max size - bootconfig is already initialized Link: http://lkml.kernel.org/r/158091060401.27924.9024818742827122764.stgit@devnote2 Signed-off-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware) --- lib/bootconfig.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/lib/bootconfig.c b/lib/bootconfig.c index 055014e233a5..a98ae136529c 100644 --- a/lib/bootconfig.c +++ b/lib/bootconfig.c @@ -373,7 +373,8 @@ static struct xbc_node * __init xbc_add_sibling(char *data, u32 flag) sib->next = xbc_node_index(node); } } - } + } else + xbc_parse_error("Too many nodes", data); return node; } @@ -657,8 +658,10 @@ static int __init xbc_verify_tree(void) struct xbc_node *n, *m; /* Empty tree */ - if (xbc_node_num == 0) + if (xbc_node_num == 0) { + xbc_parse_error("Empty config", xbc_data); return -ENOENT; + } for (i = 0; i < xbc_node_num; i++) { if (xbc_nodes[i].next > xbc_node_num) { @@ -732,12 +735,17 @@ int __init xbc_init(char *buf) char *p, *q; int ret, c; - if (xbc_data) + if (xbc_data) { + pr_err("Error: bootconfig is already initialized.\n"); return -EBUSY; + } ret = strlen(buf); - if (ret > XBC_DATA_MAX - 1 || ret == 0) + if (ret > XBC_DATA_MAX - 1 || ret == 0) { + pr_err("Error: Config data is %s.\n", + ret ? "too big" : "empty"); return -ERANGE; + } xbc_data = buf; xbc_data_size = ret + 1; -- 2.24.1