From patchwork Tue Jul 9 18:31:21 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaldo Carvalho de Melo X-Patchwork-Id: 11037343 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 947B9138D for ; Tue, 9 Jul 2019 18:34:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 81F33287C9 for ; Tue, 9 Jul 2019 18:34:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 725312884E; Tue, 9 Jul 2019 18:34:35 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 08A85287C9 for ; Tue, 9 Jul 2019 18:34:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=hF3YK3rhiXZKO9uO2USPOoYZG+KfmIR0qNpUMKtvPZ8=; b=lRt8KyqqGCVvRe IgQxpZbJmoFkxYixeWucCIxDyDuZh/DVa57Srqa1Z+gJzP3vbjHtRjTgo7DL4FxL9mnUekVWV11Oo lD7zFvhUgdybCw8WqYp1zVKqjm7E0uSOyGAhipxSplg+twNYhWM7tiRv2Q/dJlehp3CKKKujGgzC5 nxRJeBIjgf3iOlwjIDKJIlqYsTZI6N7h/NpHJoKHByq1JcK/aqZqUn3uEZH96C8Yt7O3OZY1HiC0k iWWf03AOA7t70S01hEJ8oFQM0l+yHQAfJR1dUyVavHMnTtlaiTc442eblrdnKRcT/GU7+a0glHEve OLrJVCUT3PnB2iMvYY4Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hkuwk-0008PM-1Z; Tue, 09 Jul 2019 18:34:34 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hkuvN-0006uk-Pf for linux-arm-kernel@lists.infradead.org; Tue, 09 Jul 2019 18:33:11 +0000 Received: from quaco.ghostprotocols.net (unknown [179.97.35.11]) (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 3C54520656; Tue, 9 Jul 2019 18:33:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562697189; bh=KszjUYtgLQLtSW1cBi/FB/Vr+ozCmXKbJls+v8/d2Fc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f8iQL7E15IMCw60dkBnTlvmxBoAUZtTsRcEuiS+ZwBJw3vfoOPCqXBzOWoMj3nxEN CkuFqdIoeSN9PJqvxi/3u5L+Zsj5RWauMq2A/P5L6Ayfh4F/jjnQMPH71ylZC/Zkju VU12QzNPW5IqWzjl/TjUVVrabDIAKCaL5FoxfEZs= From: Arnaldo Carvalho de Melo To: Ingo Molnar , Thomas Gleixner Subject: [PATCH 20/25] perf hists browser: Fix potential NULL pointer dereference found by the smatch tool Date: Tue, 9 Jul 2019 15:31:21 -0300 Message-Id: <20190709183126.30257-21-acme@kernel.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190709183126.30257-1-acme@kernel.org> References: <20190709183126.30257-1-acme@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190709_113310_048619_6F63706A X-CRM114-Status: GOOD ( 10.51 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Arnaldo Carvalho de Melo , Andi Kleen , Mathieu Poirier , Suzuki Poulouse , Clark Williams , linux-kernel@vger.kernel.org, Adrian Hunter , linux-perf-users@vger.kernel.org, Alexander Shishkin , Jiri Olsa , Leo Yan , Namhyung Kim , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Leo Yan Based on the following report from Smatch, fix the potential NULL pointer dereference check. tools/perf/ui/browsers/hists.c:641 hist_browser__run() error: we previously assumed 'hbt' could be null (see line 625) tools/perf/ui/browsers/hists.c:3088 perf_evsel__hists_browse() error: we previously assumed 'browser->he_selection' could be null (see line 2902) tools/perf/ui/browsers/hists.c:3272 perf_evsel_menu__run() error: we previously assumed 'hbt' could be null (see line 3260) This patch firstly validating the pointers before access them, so can fix potential NULL pointer dereference. Signed-off-by: Leo Yan Acked-by: Jiri Olsa Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Mathieu Poirier Cc: Namhyung Kim Cc: Suzuki Poulouse Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/20190708143937.7722-2-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/ui/browsers/hists.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c index 85581cfb9112..a94eb0755e8b 100644 --- a/tools/perf/ui/browsers/hists.c +++ b/tools/perf/ui/browsers/hists.c @@ -639,7 +639,11 @@ int hist_browser__run(struct hist_browser *browser, const char *help, switch (key) { case K_TIMER: { u64 nr_entries; - hbt->timer(hbt->arg); + + WARN_ON_ONCE(!hbt); + + if (hbt) + hbt->timer(hbt->arg); if (hist_browser__has_filter(browser) || symbol_conf.report_hierarchy) @@ -2821,7 +2825,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events, { struct hists *hists = evsel__hists(evsel); struct hist_browser *browser = perf_evsel_browser__new(evsel, hbt, env, annotation_opts); - struct branch_info *bi; + struct branch_info *bi = NULL; #define MAX_OPTIONS 16 char *options[MAX_OPTIONS]; struct popup_action actions[MAX_OPTIONS]; @@ -3087,7 +3091,9 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events, goto skip_annotation; if (sort__mode == SORT_MODE__BRANCH) { - bi = browser->he_selection->branch_info; + + if (browser->he_selection) + bi = browser->he_selection->branch_info; if (bi == NULL) goto skip_annotation; @@ -3271,7 +3277,8 @@ static int perf_evsel_menu__run(struct perf_evsel_menu *menu, switch (key) { case K_TIMER: - hbt->timer(hbt->arg); + if (hbt) + hbt->timer(hbt->arg); if (!menu->lost_events_warned && menu->lost_events &&