From patchwork Mon Jan 14 13:51:33 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 10762621 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0250D1390 for ; Mon, 14 Jan 2019 13:52:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E6FDD28BF8 for ; Mon, 14 Jan 2019 13:52:37 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DAE2828C02; Mon, 14 Jan 2019 13:52:37 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8B54C28C03 for ; Mon, 14 Jan 2019 13:52:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726712AbfANNvs (ORCPT ); Mon, 14 Jan 2019 08:51:48 -0500 Received: from laurent.telenet-ops.be ([195.130.137.89]:57706 "EHLO laurent.telenet-ops.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726637AbfANNvs (ORCPT ); Mon, 14 Jan 2019 08:51:48 -0500 Received: from ramsan ([84.194.111.163]) by laurent.telenet-ops.be with bizsmtp id QDrm1z0063XaVaC01DrmWu; Mon, 14 Jan 2019 14:51:46 +0100 Received: from rox.of.borg ([192.168.97.57]) by ramsan with esmtp (Exim 4.90_1) (envelope-from ) id 1gj2eX-0000EX-Uf; Mon, 14 Jan 2019 14:51:45 +0100 Received: from geert by rox.of.borg with local (Exim 4.90_1) (envelope-from ) id 1gj2eX-0006ns-Sw; Mon, 14 Jan 2019 14:51:45 +0100 From: Geert Uytterhoeven To: Shuah Khan , Masahiro Yamada , Michal Marek Cc: Jonathan Corbet , Bamvor Jian Zhang , Kees Cook , linux-kselftest@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH 01/12] selftests: gpio-mockup-chardev: Check asprintf() for error Date: Mon, 14 Jan 2019 14:51:33 +0100 Message-Id: <20190114135144.26096-2-geert+renesas@glider.be> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190114135144.26096-1-geert+renesas@glider.be> References: <20190114135144.26096-1-geert+renesas@glider.be> MIME-Version: 1.0 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP With gcc 7.3.0: gpio-mockup-chardev.c: In function ‘get_debugfs’: gpio-mockup-chardev.c:62:3: warning: ignoring return value of ‘asprintf’, declared with attribute warn_unused_result [-Wunused-result] asprintf(path, "%s/gpio", mnt_fs_get_target(fs)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Handle asprintf() failures to fix this. Signed-off-by: Geert Uytterhoeven --- tools/testing/selftests/gpio/gpio-mockup-chardev.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/gpio/gpio-mockup-chardev.c b/tools/testing/selftests/gpio/gpio-mockup-chardev.c index f8d468f54e986dd0..aaa1e9f083c37215 100644 --- a/tools/testing/selftests/gpio/gpio-mockup-chardev.c +++ b/tools/testing/selftests/gpio/gpio-mockup-chardev.c @@ -37,7 +37,7 @@ static int get_debugfs(char **path) struct libmnt_table *tb; struct libmnt_iter *itr = NULL; struct libmnt_fs *fs; - int found = 0; + int found = 0, ret; cxt = mnt_new_context(); if (!cxt) @@ -58,8 +58,11 @@ static int get_debugfs(char **path) break; } } - if (found) - asprintf(path, "%s/gpio", mnt_fs_get_target(fs)); + if (found) { + ret = asprintf(path, "%s/gpio", mnt_fs_get_target(fs)); + if (ret < 0) + err(EXIT_FAILURE, "failed to format string"); + } mnt_free_iter(itr); mnt_free_context(cxt);