Received: by 2002:a05:6902:102b:0:0:0:0 with SMTP id x11csp1372870ybt; Thu, 18 Jun 2020 07:16:13 -0700 (PDT) X-Google-Smtp-Source: ABdhPJw5t3yJZr0OSa8AEHrGsxYfsV/C0CnGFw6gmY2k04Xs5tafurUJgHRi4m3ZKv4bi3V4chjB X-Received: by 2002:aa7:d785:: with SMTP id s5mr4506666edq.17.1592489773571; Thu, 18 Jun 2020 07:16:13 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1592489773; cv=none; d=google.com; s=arc-20160816; b=XypBWSibwDMvxLPx1Df4h/KxkCpqGXjCXKyckyzgVqtLK8+ZP5yI2GhfoTe4wZ9Zs5 RFq2CWdc7su43lq8/9CAUuiJYLlZ9qCNEbWaxEfFvn2OsHhKXqlXo6AZqIxJJcQdB5io UqecGbPCfuT0jKcK8+FiRi6s2YrGWdrNGg1rOaA9+pv0k08qMeBVnzwRzce9hPf2urPZ 2lvbbD5dfCTqyR6g/kIpo6dHz/8qRJnkQDpeKKRtAYSi5fo/7SMM2+J+K76drdbm2wuv P8NWYJXxF0zgUs3k/8jCQK/zsdxXyXdV27jrI6et15MT3L47WKxN7549AUI7ovhavBwB sG/g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :ironport-sdr:ironport-sdr; bh=fzV8+KCv3z9PKo/ggH1Nors47XOpFg2gEksfl/EYaiM=; b=poNPMiPAknQNZ2aDL1wl7YY1cbSv7nE5S+M/8TvPkx1YGfpOM2SKnCwuexPQqTXHpp 5mys52fLSDOoTqlRG3VRpw9d/XFujJZFStQZdsYyXwFiLJo9S7jBMpQF4qdT0yI/j08c GAUQ2/jywvswDFHa4LVEX4CEZ0GyZxqAwk5T+U7dHVJS9qtVtldXcU8x9AL1uSB9ZEUC gLRtWzhSyasj/NK7BfjgI3sqAJ8jaJkQowEEhJIFaQC6somyCRSxVKZEmjZ2HAhC6/pZ 9WSOMMWtq3i0tl5JVHkK3GBIyntfXUV7wR9raJI147pCErl8oQQnNt5KKSveluJZwzqn cseQ== ARC-Authentication-Results: i=1; mx.google.com; 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=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id sb5si2011168ejb.274.2020.06.18.07.15.51; Thu, 18 Jun 2020 07:16:13 -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; 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=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730713AbgFRONv (ORCPT + 99 others); Thu, 18 Jun 2020 10:13:51 -0400 Received: from mga01.intel.com ([192.55.52.88]:41861 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730707AbgFRONu (ORCPT ); Thu, 18 Jun 2020 10:13:50 -0400 IronPort-SDR: c4aarDERm/AHYz4XmbDck8mtVoDgoCk88l9yoXlq1vfB8fFDue9+NvhsvKxdrtqTYWXxviZfWW p6WMW/v7adLw== X-IronPort-AV: E=McAfee;i="6000,8403,9655"; a="160677192" X-IronPort-AV: E=Sophos;i="5.73,526,1583222400"; d="scan'208";a="160677192" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Jun 2020 07:13:49 -0700 IronPort-SDR: jk6Z/xghMixVveuzV47x56u8F2cumT/HPXJZLEnYZ6tSN6mZMWxSmnDjo/hzQoCQxld7bbEMsj m7YAfMudqZ0Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,526,1583222400"; d="scan'208";a="262035116" Received: from tassilo.jf.intel.com (HELO tassilo.localdomain) ([10.7.201.21]) by fmsmga007.fm.intel.com with ESMTP; 18 Jun 2020 07:13:48 -0700 Received: by tassilo.localdomain (Postfix, from userid 1000) id 7BDFA301674; Thu, 18 Jun 2020 07:13:49 -0700 (PDT) Date: Thu, 18 Jun 2020 07:13:49 -0700 From: Andi Kleen To: Gaurav Singh Cc: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Ravi Bangoria , "open list:PERFORMANCE EVENTS SUBSYSTEM" Subject: Re: [PATCH] [perf] sort : Fix null pointer dereference in _hist_entry__sym_snprintf Message-ID: <20200618141349.GA793265@tassilo.jf.intel.com> References: <20200618003040.26360-1-gaurav1086@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200618003040.26360-1-gaurav1086@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > 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; This should have given warnings because Linux and perf coding style forbids fixed statement/declarations. Also what's the backtrace where it is NULL? Perhaps better to fix it in the caller. -Andi