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=-13.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 B13C0C433ED for ; Tue, 14 Jul 2020 19:04:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8DF6F22AAF for ; Tue, 14 Jul 2020 19:04:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594753458; bh=Y3gmnZ14UNbPHkqjjTj7iYbabG72aVSl4P4Rk3VvwZQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ZjquWCh6CNNG/m9XFy+cAueApDNFbuiLy06MMv6XybNQshFPr9eSAvvprJBvRQeEZ kpGRcX5+8sQSm8ngFZTU2Xea1DLqwTw9cWmfoITnsNkShh8d2nItxU2npw0wqGBlwL ARGEHDJeS6RLs9HzN3PBhELcUXYGWEcxABzpVYNs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730415AbgGNTEM (ORCPT ); Tue, 14 Jul 2020 15:04:12 -0400 Received: from mail.kernel.org ([198.145.29.99]:54114 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730546AbgGNS4P (ORCPT ); Tue, 14 Jul 2020 14:56:15 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 84F6922282; Tue, 14 Jul 2020 18:56:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594752975; bh=Y3gmnZ14UNbPHkqjjTj7iYbabG72aVSl4P4Rk3VvwZQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kqLIqZF4WXWkJNPLnCawZ2pYZC5sH3RTcxFQQPhI9EFwjxkecFvKTUzzideF0krq9 Ude0BlrbtQGSCU3S8zDkA278AdxV7/lJQZXEpcYNy3wnl1vtVMujmH+IdNTxTfkI3D bdzJ+1EzYotn9URt/Z9N60B83jHHvhDuAE8guDes= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Wei Li , Jiri Olsa , Namhyung Kim , Arnaldo Carvalho de Melo , Alexander Shishkin , Andi Kleen , Hanjun Guo , Jin Yao , Mark Rutland , Sasha Levin Subject: [PATCH 5.7 072/166] perf report TUI: Fix segmentation fault in perf_evsel__hists_browse() Date: Tue, 14 Jul 2020 20:43:57 +0200 Message-Id: <20200714184119.305256839@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200714184115.844176932@linuxfoundation.org> References: <20200714184115.844176932@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Wei Li [ Upstream commit d61cbb859b45fdb6b4997f2d51834fae41af0e94 ] The segmentation fault can be reproduced as following steps: 1) Executing perf report in tui. 2) Typing '/xxxxx' to filter the symbol to get nothing matched. 3) Pressing enter with no entry selected. Then it will report a segmentation fault. It is caused by the lack of check of browser->he_selection when accessing it's member res_samples in perf_evsel__hists_browse(). These processes are meaningful for specified samples, so we can skip these when nothing is selected. Fixes: 4968ac8fb7c3 ("perf report: Implement browsing of individual samples") Signed-off-by: Wei Li Acked-by: Jiri Olsa Acked-by: Namhyung Kim Tested-by: Arnaldo Carvalho de Melo Cc: Alexander Shishkin Cc: Andi Kleen Cc: Hanjun Guo Cc: Jin Yao Cc: Mark Rutland Link: http://lore.kernel.org/lkml/20200612094322.39565-1-liwei391@huawei.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/ui/browsers/hists.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c index 487e54ef56a98..2101b6b770d81 100644 --- a/tools/perf/ui/browsers/hists.c +++ b/tools/perf/ui/browsers/hists.c @@ -2288,6 +2288,11 @@ static struct thread *hist_browser__selected_thread(struct hist_browser *browser return browser->he_selection->thread; } +static struct res_sample *hist_browser__selected_res_sample(struct hist_browser *browser) +{ + return browser->he_selection ? browser->he_selection->res_samples : NULL; +} + /* Check whether the browser is for 'top' or 'report' */ static inline bool is_report_browser(void *timer) { @@ -3357,16 +3362,16 @@ static int perf_evsel__hists_browse(struct evsel *evsel, int nr_events, &options[nr_options], NULL, NULL, evsel); nr_options += add_res_sample_opt(browser, &actions[nr_options], &options[nr_options], - hist_browser__selected_entry(browser)->res_samples, - evsel, A_NORMAL); + hist_browser__selected_res_sample(browser), + evsel, A_NORMAL); nr_options += add_res_sample_opt(browser, &actions[nr_options], &options[nr_options], - hist_browser__selected_entry(browser)->res_samples, - evsel, A_ASM); + hist_browser__selected_res_sample(browser), + evsel, A_ASM); nr_options += add_res_sample_opt(browser, &actions[nr_options], &options[nr_options], - hist_browser__selected_entry(browser)->res_samples, - evsel, A_SOURCE); + hist_browser__selected_res_sample(browser), + evsel, A_SOURCE); nr_options += add_switch_opt(browser, &actions[nr_options], &options[nr_options]); skip_scripting: -- 2.25.1