Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp3487723imu; Fri, 18 Jan 2019 11:14:15 -0800 (PST) X-Google-Smtp-Source: ALg8bN4JIVYMN7yQ+wn9Y0+tZx4RuHL6vZrkQQBvE0R3fuHVIXAB/DcamXfFj6laDjKvF/n7tZ1U X-Received: by 2002:a63:77ce:: with SMTP id s197mr18792603pgc.89.1547838855681; Fri, 18 Jan 2019 11:14:15 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1547838855; cv=none; d=google.com; s=arc-20160816; b=TcgI6hkSYkxeGLtBTQsXB/o3geFgOn91JMiNSCoqQiLP2XVVCYo1hYSLFzr9+YefOB aK9Or5aynaE1Y1O5QOHhSsb4s5hrf6MU4NQ/AttX2qbvq4HjYDn87hjQrKlJznVALcvG 3OlSLK2SaEVX9OcJ+qxyKhRF0d6vOf/9OaFnQr1Kd4FDAbT8gI04olPraMN/7PRYGc78 VugwFvLm+koQe+GGeLmSDQTWgfJXgq4gXLq7lozC7GMhXLKAGyMrZ+yvW4Ks236EMsl2 Y5qXt211ni2X821BcSpZSQYeVVIpa91E2SkkfxmaJQFY5jW4kKz6D60HKgrUVLbq8i7E 0hyg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:from:references:cc:to:subject; bh=e7A/ek4HMBiaWJm9VGTlq71bs675OhF1g7+CWHSgEqk=; b=LmeoqD2IyJ43gMQ/p6a/H5qL3TO7kt05eIVMDwyH+uUXoHcth0h8giVYg4pIHVkDn+ iq+KyqWFU1yVyqJPzJ7Qc6AaxJj0ygDX1tLjHTfp44QEn9zMTHeDUNb+ih99sS/G52z4 ZFDYam1rcIeHZY9P6VncfE5f9BEKRZ1hhJgM3m39Xv2Gq/i1QAnWISbiHyAV0ZktP8lq bDcN+NyfqArgdkVec2az39aAMskaVadStnlWwTFmvcjtNmcPheIm/AL31oDUlrFnD6DD D7wXgooEpdVACSUGb+E5/Wmi/aPTNSzsVOGC9gyzepAgAgrrcym8uxf2YBvRRbd0Z3Ax m8zQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id g3si5562846pgo.595.2019.01.18.11.13.57; Fri, 18 Jan 2019 11:14:15 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729311AbfARTMd (ORCPT + 99 others); Fri, 18 Jan 2019 14:12:33 -0500 Received: from foss.arm.com ([217.140.101.70]:36766 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729115AbfARTMc (ORCPT ); Fri, 18 Jan 2019 14:12:32 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 6C2B6EBD; Fri, 18 Jan 2019 11:12:32 -0800 (PST) Received: from [10.1.25.172] (DESKTOP-VLO843J.cambridge.arm.com [10.1.25.172]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 2CF603F6A8; Fri, 18 Jan 2019 11:12:30 -0800 (PST) Subject: Re: kmemleak panic To: Marc Gonzalez , Catalin Marinas Cc: Mark Rutland , Arnd Bergmann , Ard Biesheuvel , Oscar Salvador , Wei Yang , Michal Hocko , Andrew Morton , Linus Torvalds , Sri Krishna chowdary , Qian Cai , LKML References: <20190118143434.GE118707@arrakis.emea.arm.com> From: Robin Murphy Message-ID: Date: Fri, 18 Jan 2019 19:12:25 +0000 User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2019-01-18 3:36 pm, Marc Gonzalez wrote: > Unable to handle kernel paging request at virtual address ffffffc021e00000 I can't help but notice that you seem to get the same address in 4 different logs - if it really is that deterministic then that's quite the boon for debugging (FWIW my first thought is that it looks a lot like a phys_to_virt() of something bogus). I've never used kmemleak myself, but looking at where it's crashing it appears to think that that address is a valid object - if I'm reading the docs correctly then I guess the "dump" command ought to be able to tell you where it thinks that object came from. Robin.