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=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 23F02C433DB for ; Thu, 14 Jan 2021 21:24:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D31DE22DFA for ; Thu, 14 Jan 2021 21:24:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728172AbhANVXy (ORCPT ); Thu, 14 Jan 2021 16:23:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41598 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726123AbhANVXy (ORCPT ); Thu, 14 Jan 2021 16:23:54 -0500 Received: from mail-qv1-xf49.google.com (mail-qv1-xf49.google.com [IPv6:2607:f8b0:4864:20::f49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 46FEDC061575 for ; Thu, 14 Jan 2021 13:23:09 -0800 (PST) Received: by mail-qv1-xf49.google.com with SMTP id t17so5643670qvv.17 for ; Thu, 14 Jan 2021 13:23:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:message-id:mime-version:subject:from:to:cc; bh=jzfFa6HK8DUXvWk641uxKNtwo7CfZc7SmxmcOl3szj8=; b=uPkijkzJUZRg1Tsm4KPprFQRfZBjaCGENNUVb0j7+yaO2bqAjGnAjuIRTU2BxDDX3x RU9gbc7ksXF7WbysxlB3zjK72tiJR7hgYYMBAmEc+g/bau1Gxci4CNUh7QzM3Mlm53uE QDSTkUXP98mgKk/WptnI9kroA1q9xVbDkU1F6B7tM4dyqIPu3MNeTTsN1zNc83B0ue61 h7+lxXQ2Nqg6jrd39e7jHIftl1cXUpXmGk06ZeJmUd5kAUvyIH3Asvol4uqNIFKJ1JQ0 xxrlDtlvM3k2VvUI+Xir729sa7khOtT4Y+hTHQfWj9CgUOINIjcdYGCKxpaAu/ggeiJV QbiQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:message-id:mime-version:subject:from :to:cc; bh=jzfFa6HK8DUXvWk641uxKNtwo7CfZc7SmxmcOl3szj8=; b=LM4IiJFwuK4lsC5aNe7q77Am2ybwCclaOisaCAEVCwvy2BHNWGfdWeIsKnBEHw3i+C 6c78qKT4Ip598e7i01SpKbELCPfscYSTR2v5hmW0HxXMfbqZPJdp6taAsnUV7pTv55Jy eC5vaLYVi24XNONBNhl/6Awt8Bsyz2OV0Npo+9ckj1J8fSlvzsxTE31rQ9MXMJ3mXEar wT1u+MqbzD5imDkkns7hEuUkiEDDs9sIbUBeHGHwZDITleApxZouJ0SkoHTQx23c7aRS p9cHcUdyigiTkvefh8H6whNxVDYyUNBoq1l5RVaV2Dwq1BT6ea8fwBJnBPpXRysVileq yNpQ== X-Gm-Message-State: AOAM531677im+bHw012wQcCttj0RhSsS74r8bxvfIdeScTU4L8GWjo9U FkBWxKfVhsTYtK5/fQ/5xSyTDkrRll5/ X-Google-Smtp-Source: ABdhPJwFlpCJ5GBjzu3MDP3bCHVVTrSaIa+h5JD9NQCSdghwConJwX6t/kI+vXT347djyRjqxPv0XwxM28Lc Sender: "irogers via sendgmr" X-Received: from irogers.svl.corp.google.com ([2620:15c:2cd:2:f693:9fff:fef4:4583]) (user=irogers job=sendgmr) by 2002:a0c:fd8f:: with SMTP id p15mr9165518qvr.48.1610659388226; Thu, 14 Jan 2021 13:23:08 -0800 (PST) Date: Thu, 14 Jan 2021 13:23:04 -0800 Message-Id: <20210114212304.4018119-1-irogers@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.30.0.296.g2bfb1c46d8-goog Subject: [PATCH] libperf tests: Avoid uninitialized variable warning. From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , linux-kernel@vger.kernel.org Cc: Stephane Eranian , Ian Rogers Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The variable bf is read (for a write call) without being initialized triggering a memory sanitizer warning. Use bf in the read and switch the write to reading from a string. Signed-off-by: Ian Rogers --- tools/lib/perf/tests/test-evlist.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/lib/perf/tests/test-evlist.c b/tools/lib/perf/tests/test-evlist.c index 6d8ebe0c2504..1b225fe34a72 100644 --- a/tools/lib/perf/tests/test-evlist.c +++ b/tools/lib/perf/tests/test-evlist.c @@ -208,7 +208,6 @@ static int test_mmap_thread(void) char path[PATH_MAX]; int id, err, pid, go_pipe[2]; union perf_event *event; - char bf; int count = 0; snprintf(path, PATH_MAX, "%s/kernel/debug/tracing/events/syscalls/sys_enter_prctl/id", @@ -229,6 +228,7 @@ static int test_mmap_thread(void) pid = fork(); if (!pid) { int i; + char bf; read(go_pipe[0], &bf, 1); @@ -266,7 +266,7 @@ static int test_mmap_thread(void) perf_evlist__enable(evlist); /* kick the child and wait for it to finish */ - write(go_pipe[1], &bf, 1); + write(go_pipe[1], "A", 1); waitpid(pid, NULL, 0); /* -- 2.30.0.296.g2bfb1c46d8-goog