Received: by 2002:a05:6902:102b:0:0:0:0 with SMTP id x11csp907590ybt; Wed, 17 Jun 2020 17:33:02 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyc2mLcYl1Riu3xqynGcGHBqjrnRgqMQFVqWoIJdd6WSC4egd71zJEpPpC1tDszre/n7KLL X-Received: by 2002:a50:d790:: with SMTP id w16mr1554599edi.231.1592440382180; Wed, 17 Jun 2020 17:33:02 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1592440382; cv=none; d=google.com; s=arc-20160816; b=eOQheYZZQOMvE03K/Y++GvMN0rbeGJAenFJveCudjEmPY8yLQvy2yKJJXtETZYloeC QVxlvtchGMPjcmizXwHMMo2NnnfXF4OUrdyqPwBSuUHyGtDeUF9ndovOPuRiV98gQLNI 5dn77yZVFudTOdTje7g4sSWReDA3QOhYVU18IRXQjw0i/PCR4UiIuV8g30+BFkqLEQYQ eBzqMkQKYSIyMEf9qw3kz+zqEjLX3TuMCq2GziaTspxmTfCzCV1JWGxr93VkEflcXP8B vM0YU2CeM9FsSpfApq1FMpkQbENUD24aP8862B4xfUKviYFxl99VoUZ+4RG8Mg1qOs2U Ly3A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:date:subject:to:from :dkim-signature; bh=akP5TkvP5YIRbXmgcjZryXwqTlfdBNOtLQhNnMzmBg8=; b=PdU49TirVaZRkg3cZqG+Vi+Pea+HZTwnKdRAekoQXwgqPA+n2g8uLO+oWHfgU9wwQ3 eWd7eJqtEpomOTYeIv8LRWGKbtdS5EYDZHu3tIqMVcK5DmUD69Fhsenw8iDQKkQ6sISL 8JegDP9i1K5sSnfCEcrdXuuJmU60WuJr4CPcF9cb0A0qtJjJM0X112bA7B1VFOSmXtG8 qWZf5uBZ5HOGpafImUdyZwzGGDWO7RboRKFf2sPkwUykuIEOmpLvoIdDDQ0/HpmYSSdC VL6olgcDMubj0BYlrpoatbnkUDJ/jjiLNEOH5gU8VvTfY/5PLYh8uFdK/R0J3mIebqZp ni3g== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=fsGlLlWz; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id be9si983530edb.16.2020.06.17.17.32.38; Wed, 17 Jun 2020 17:33:02 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=fsGlLlWz; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726975AbgFRAat (ORCPT + 99 others); Wed, 17 Jun 2020 20:30:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39272 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726815AbgFRAat (ORCPT ); Wed, 17 Jun 2020 20:30:49 -0400 Received: from mail-qt1-x843.google.com (mail-qt1-x843.google.com [IPv6:2607:f8b0:4864:20::843]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1E62DC06174E for ; Wed, 17 Jun 2020 17:30:49 -0700 (PDT) Received: by mail-qt1-x843.google.com with SMTP id c12so3095149qtq.11 for ; Wed, 17 Jun 2020 17:30:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id; bh=akP5TkvP5YIRbXmgcjZryXwqTlfdBNOtLQhNnMzmBg8=; b=fsGlLlWzYEWqgg5lC7qq3g3HVKzQyMMUjnuhIMp8KzYT0eltdurHq8Z0Q/PAMHug9B R5Ft+yQbK5elRA5weU43vQMisjAf7hahd8ymokdWebcw1Kf5/eqr/mE+d5+R9glzRTQ+ F7kpOiubXtU48uqUGJZA8KtfpKkHox/qg3GslDiNnnpgE6TpTE2wDMmptz3N1DVPyQjf 5APlGU/MQFfDVFWRpyCMP4KPlVw41jbUAbUTxkVHqJ36HOsjQJSRG+QkkokvcVnHfC8C Lj4Hjel5k6XRhb0VajDY23R1ARn4oBrWM7O4ScameFFXO/G6Qda1RbFXy0QJb6vu8O5b RS2g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id; bh=akP5TkvP5YIRbXmgcjZryXwqTlfdBNOtLQhNnMzmBg8=; b=FhPrrO9o+pldeVVc9UJAtvtQLT2jvemV642HFhU+LnYhAkee4rvJnidqqdWuHsdsNJ Dr11vtao01mIVg5Mej9KYjnDwm1WR938SkGtQrXZIbqFFVmQvpk/Zk9lJSPQJz3GwZjt Majt8nZP77NJrnvpneCABr3dP4UFx/HAff5sHj708jVR2gzYV0zgYDsngY0tGVR4tC/Q 6WzoFJ5+9H1raMleNERfBDynMtIo9rmyB/4psonZySRozqLg3Bn2cCWIgVQyWm8hXifk VnU2Bbw7WkvaDxayjDCLHiUZA13nduYKLFuzTVvmbzMe7HrsPh5rEwtllvQIQkd54hq1 QXFw== X-Gm-Message-State: AOAM532DNZajrpsmOSlysRe0MSJTlaV2Va8JBTynZayC6VgjlmYEYncs c3Ko+1cwcx85AQDWTyEu1Mo= X-Received: by 2002:ac8:3f77:: with SMTP id w52mr1834059qtk.161.1592440248360; Wed, 17 Jun 2020 17:30:48 -0700 (PDT) Received: from linux.home ([2604:2000:1344:41d:9c3:b47c:c995:4853]) by smtp.googlemail.com with ESMTPSA id k81sm1450121qke.11.2020.06.17.17.30.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Jun 2020 17:30:47 -0700 (PDT) From: Gaurav Singh To: gaurav1086@gmail.com, Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Ravi Bangoria , Andi Kleen , linux-kernel@vger.kernel.org (open list:PERFORMANCE EVENTS SUBSYSTEM) Subject: [PATCH] [perf] sort : Fix null pointer dereference in _hist_entry__sym_snprintf Date: Wed, 17 Jun 2020 20:30:18 -0400 Message-Id: <20200618003040.26360-1-gaurav1086@gmail.com> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The pointer ms can be NULL. Add null check before dereferencing it to avoid segmentation fault. Signed-off-by: Gaurav Singh --- tools/perf/util/sort.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c index d42339df20f8..25c7c96893f6 100644 --- a/tools/perf/util/sort.c +++ b/tools/perf/util/sort.c @@ -294,6 +294,9 @@ static int _hist_entry__sym_snprintf(struct map_symbol *ms, u64 ip, char level, char *bf, size_t size, unsigned int width) { + if (!ms) + return 0; + struct symbol *sym = ms->sym; struct map *map = ms->map; size_t ret = 0; -- 2.17.1