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=-11.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 EC923C742D7 for ; Sat, 13 Jul 2019 11:05:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B8CD92083B for ; Sat, 13 Jul 2019 11:05:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=zytor.com header.i=@zytor.com header.b="rJtTyXNA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727843AbfGMLF3 (ORCPT ); Sat, 13 Jul 2019 07:05:29 -0400 Received: from terminus.zytor.com ([198.137.202.136]:33997 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726755AbfGMLF2 (ORCPT ); Sat, 13 Jul 2019 07:05:28 -0400 Received: from terminus.zytor.com (localhost [127.0.0.1]) by terminus.zytor.com (8.15.2/8.15.2) with ESMTPS id x6DB5F8X3840827 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Sat, 13 Jul 2019 04:05:15 -0700 DKIM-Filter: OpenDKIM Filter v2.11.0 terminus.zytor.com x6DB5F8X3840827 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zytor.com; s=2019061801; t=1563015916; bh=njQoAtpsOTN3ydOHz+RomNxHuhy2whW4+IYVmtasUcY=; h=Date:From:Cc:Reply-To:In-Reply-To:References:To:Subject:From; b=rJtTyXNAFdLvxscRTkVt0VsfeGdK/0O+S/Z1OdJPu/xxTx+j2VANzf1fVzdfwfjMT qge3AXjk3d7LBztcCq1km2chtsiorsqdfvmgnBqKvZZjJHOiSOhOjK2uQwTNaCNqlq k9OxNmcka8RE0R0ljsKQ7vVwGv7oEYpuvXPaHFNElS187DxRLQJW6tzBf7HErrM3Tk MIo9CZ2Yz4frA6csHC8vJ6fuFth4RPxBA2ZLSBAjghOa4qZAxJ/rLdpvd668p1PRFN aLiaEJx/ioJQGm7GAqLJDZyvN7m5TPxj8AcpY8BVg1aGYGxdkDrsjv6J1KfCFR1yvn uAKqLivXE+39A== Received: (from tipbot@localhost) by terminus.zytor.com (8.15.2/8.15.2/Submit) id x6DB5FJr3840824; Sat, 13 Jul 2019 04:05:15 -0700 Date: Sat, 13 Jul 2019 04:05:15 -0700 X-Authentication-Warning: terminus.zytor.com: tipbot set sender to tipbot@zytor.com using -f From: tip-bot for Leo Yan Message-ID: Cc: linux-kernel@vger.kernel.org, suzuki.poulose@arm.com, hpa@zytor.com, jolsa@redhat.com, ak@linux.intel.com, acme@redhat.com, adrian.hunter@intel.com, mingo@kernel.org, mathieu.poirier@linaro.org, alexander.shishkin@linux.intel.com, leo.yan@linaro.org, tglx@linutronix.de, namhyung@kernel.org Reply-To: tglx@linutronix.de, alexander.shishkin@linux.intel.com, mathieu.poirier@linaro.org, ak@linux.intel.com, mingo@kernel.org, adrian.hunter@intel.com, jolsa@redhat.com, hpa@zytor.com, suzuki.poulose@arm.com, linux-kernel@vger.kernel.org, leo.yan@linaro.org, namhyung@kernel.org, acme@redhat.com In-Reply-To: <20190708143937.7722-5-leo.yan@linaro.org> References: <20190708143937.7722-5-leo.yan@linaro.org> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/urgent] perf cs-etm: Fix potential NULL pointer dereference found by the smatch tool Git-Commit-ID: 0702f23c983b8a921853c33a9f59b9cf0975d36e X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 0702f23c983b8a921853c33a9f59b9cf0975d36e Gitweb: https://git.kernel.org/tip/0702f23c983b8a921853c33a9f59b9cf0975d36e Author: Leo Yan AuthorDate: Mon, 8 Jul 2019 22:39:37 +0800 Committer: Arnaldo Carvalho de Melo CommitDate: Tue, 9 Jul 2019 10:13:27 -0300 perf cs-etm: Fix potential NULL pointer dereference found by the smatch tool Based on the following report from Smatch, fix the potential NULL pointer dereference check. tools/perf/util/cs-etm.c:2545 cs_etm__process_auxtrace_info() error: we previously assumed 'session->itrace_synth_opts' could be null (see line 2541) tools/perf/util/cs-etm.c 2541 if (session->itrace_synth_opts && session->itrace_synth_opts->set) { 2542 etm->synth_opts = *session->itrace_synth_opts; 2543 } else { 2544 itrace_synth_opts__set_default(&etm->synth_opts, 2545 session->itrace_synth_opts->default_no_sample); ^^^^^^^^^^^^^^^^^^^^^^^^^^ 2546 etm->synth_opts.callchain = false; 2547 } 'session->itrace_synth_opts' is impossible to be a NULL pointer in cs_etm__process_auxtrace_info(), thus this patch removes the NULL test for 'session->itrace_synth_opts'. Signed-off-by: Leo Yan Reviewed-by: Mathieu Poirier Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jiri Olsa Cc: Namhyung Kim Cc: Suzuki Poulouse Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/20190708143937.7722-5-leo.yan@linaro.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/cs-etm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c index 508e4a3ddc8c..67b88b599a53 100644 --- a/tools/perf/util/cs-etm.c +++ b/tools/perf/util/cs-etm.c @@ -2538,7 +2538,7 @@ int cs_etm__process_auxtrace_info(union perf_event *event, return 0; } - if (session->itrace_synth_opts && session->itrace_synth_opts->set) { + if (session->itrace_synth_opts->set) { etm->synth_opts = *session->itrace_synth_opts; } else { itrace_synth_opts__set_default(&etm->synth_opts,