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=-0.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, 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 67ACAC282DA for ; Wed, 17 Apr 2019 16:58:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 33ABB20674 for ; Wed, 17 Apr 2019 16:58:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="FrIDlC46"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="n9jhW7Nu" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732882AbfDQQ6L (ORCPT ); Wed, 17 Apr 2019 12:58:11 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:38598 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729512AbfDQQ6L (ORCPT ); Wed, 17 Apr 2019 12:58:11 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 768E360779; Wed, 17 Apr 2019 16:58:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1555520290; bh=PEWeQz2FscZAVdhG0YIbtiOsZnfi+COBFLh4acycfPQ=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=FrIDlC46NNLx+Lwwkq8y5L3df9oC3fqaY8yoVnFFCJ8fStLq6Bt01g1FDWF6sHukq KQM28qaI8lsScOohc14706wqU+GZsnTUP19mM9e4hh0Ae+4eIUdA+hfdVH5QVW4bbV YTRnyL2HokXW65Cb+/xRtFnOD+kGUjsZjHuY8QMw= Received: from [192.168.1.9] (unknown [171.49.248.175]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: shajit@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 1844060392; Wed, 17 Apr 2019 16:58:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1555520289; bh=PEWeQz2FscZAVdhG0YIbtiOsZnfi+COBFLh4acycfPQ=; h=Subject:To:Cc:References:From:Date:In-Reply-To:From; b=n9jhW7Nu2dLHUg5248XWjYYZv4RNCzwult4Ac3i29tcVsaUZc7NoitsUiCW+xThj2 ditM6CpCbM/qkNhLVTIATkMN4tajcuLaw2kvY/kRmD4WrWIihUo8RAQQuzuft7OlPR F/QGTgy+j9GhQfersMMns4jk3QOG5UXsADLgN6Qw= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 1844060392 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=shajit@codeaurora.org Subject: Re: fs/proc: Crash observed in next_tgid (fs/proc/base.c) To: Marc Gonzalez Cc: Kees Cook , LKML References: <4cb1d095-54a1-a7aa-762f-df77dddc4621@free.fr> From: Jitendra Sharma Message-ID: Date: Wed, 17 Apr 2019 22:28:02 +0530 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <4cb1d095-54a1-a7aa-762f-df77dddc4621@free.fr> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Thanks Marc and Kees for replying. Answer to your queries: Kernel version: 4.14.83 Test case: Not some specific test case. Issue reproduced while doing monkey testing for very long hours. Thanks, Jitendra On 4/17/2019 5:41 PM, Marc Gonzalez wrote: > On 15/04/2019 14:58, Jitendra Sharma wrote: > >> We are observing one kernel crash in next_tgid function through >> getdents64 path. Call stack is as shown below: > > It might help if you specify the exact kernel version you are discussing, > as in which tag or commit hash you are running. > > Also, what are you doing to trigger the issue? > > Regards. > -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation