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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 7DB2BECE599 for ; Wed, 16 Oct 2019 22:16:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4FEE6207FF for ; Wed, 16 Oct 2019 22:16:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571264166; bh=c+80AyRjtEUyKEjVzvFoFL1js9MaBhs+Nw2cCytC8BE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=fyKXKiyhl1nMVxiBHjq9C8h426LkzXy6eyX3/FRCV5W2V92rCzTVG55xKf8Fe1BT2 QghfxxRHl1gcxbbsRJvgnNLeCHo3VG/SYcfBZVFhKs32fUFqp8a57cQCHHUKgdtrQV h4G+hkOIS3ModMORWVn95HmF+g+/gzja3U3H1cDQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2407443AbfJPWQD (ORCPT ); Wed, 16 Oct 2019 18:16:03 -0400 Received: from mail.kernel.org ([198.145.29.99]:45804 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2437754AbfJPVzS (ORCPT ); Wed, 16 Oct 2019 17:55:18 -0400 Received: from localhost (unknown [192.55.54.58]) (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 297E121D7A; Wed, 16 Oct 2019 21:55:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571262917; bh=c+80AyRjtEUyKEjVzvFoFL1js9MaBhs+Nw2cCytC8BE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=t2Kh53J4inxbVr48w9XhdNk0w9gdKnnfF46we1/i/TwxQkTkMfmtsYF4QFq4N0xA+ gkI/nKxRT9iPmSGjHej/0QVSYt6ZSfF2Thr9ZUpMny0AWhY02PpPjOMwEqlO0xp2l+ TidMrRli42BICEehAFBqAdmMPQhRj9xk0kYh+FsM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ian Rogers , Alexander Shishkin , Andi Kleen , Jiri Olsa , Namhyung Kim , Peter Zijlstra , Stephane Eranian , Wang Nan , Arnaldo Carvalho de Melo Subject: [PATCH 4.9 77/92] perf llvm: Dont access out-of-scope array Date: Wed, 16 Oct 2019 14:50:50 -0700 Message-Id: <20191016214846.206485152@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191016214759.600329427@linuxfoundation.org> References: <20191016214759.600329427@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ian Rogers commit 7d4c85b7035eb2f9ab217ce649dcd1bfaf0cacd3 upstream. The 'test_dir' variable is assigned to the 'release' array which is out-of-scope 3 lines later. Extend the scope of the 'release' array so that an out-of-scope array isn't accessed. Bug detected by clang's address sanitizer. Fixes: 07bc5c699a3d ("perf tools: Make fetch_kernel_version() publicly available") Cc: stable@vger.kernel.org # v4.4+ Signed-off-by: Ian Rogers Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Wang Nan Link: http://lore.kernel.org/lkml/20190926220018.25402-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Greg Kroah-Hartman --- tools/perf/util/llvm-utils.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/tools/perf/util/llvm-utils.c +++ b/tools/perf/util/llvm-utils.c @@ -220,14 +220,14 @@ static int detect_kbuild_dir(char **kbui const char *prefix_dir = ""; const char *suffix_dir = ""; + /* _UTSNAME_LENGTH is 65 */ + char release[128]; + char *autoconf_path; int err; if (!test_dir) { - /* _UTSNAME_LENGTH is 65 */ - char release[128]; - err = fetch_kernel_version(NULL, release, sizeof(release)); if (err)