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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 C74D2ECDE47 for ; Thu, 8 Nov 2018 16:14:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9146020857 for ; Thu, 8 Nov 2018 16:14:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9146020857 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727438AbeKIBvC (ORCPT ); Thu, 8 Nov 2018 20:51:02 -0500 Received: from mga02.intel.com ([134.134.136.20]:63445 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726963AbeKIBvC (ORCPT ); Thu, 8 Nov 2018 20:51:02 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 Nov 2018 08:14:50 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,480,1534834800"; d="scan'208";a="94690639" Received: from um.fi.intel.com (HELO localhost) ([10.237.72.212]) by FMSMGA003.fm.intel.com with ESMTP; 08 Nov 2018 08:14:47 -0800 From: Alexander Shishkin To: Vince Weaver , Vince Weaver Cc: linux-kernel@vger.kernel.org, Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Jiri Olsa , Namhyung Kim , torvalds@linux-foundation.org Subject: Re: perf: perf_fuzzer triggers NULL pointer dereference In-Reply-To: References: Date: Thu, 08 Nov 2018 18:14:47 +0200 Message-ID: <87a7mj5yx4.fsf@ashishki-desk.ger.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Vince Weaver writes: > On Thu, 8 Nov 2018, Vince Weaver wrote: > >> [91760.326510] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 >> [91760.334876] PGD 0 P4D 0 >> [91760.337596] Oops: 0000 [#1] SMP PTI >> [91760.341332] CPU: 6 PID: 0 Comm: swapper/6 Tainted: G W 4.20.0-rc1+ #119 >> [91760.349816] Hardware name: LENOVO 10AM000AUS/SHARKBAY, BIOS FBKT72AUS 01/26/2014 >> [91760.357723] RIP: 0010:perf_prepare_sample+0x82/0x4a0 > > so what's the best way to do the equivelent of addr2line on something like > this, now that we aren't allowed to know the RIP anymore? scripts/decode_stacktrace.sh works most of the time. Sounds like BTS needs fixing up again. Thanks for looking at it though! Regards, -- Alex