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 EEA22C61CE8 for ; Sat, 19 Jan 2019 17:21:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C0A092084C for ; Sat, 19 Jan 2019 17:21:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728703AbfASRVT convert rfc822-to-8bit (ORCPT ); Sat, 19 Jan 2019 12:21:19 -0500 Received: from pegase1.c-s.fr ([93.17.236.30]:55263 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726748AbfASRVT (ORCPT ); Sat, 19 Jan 2019 12:21:19 -0500 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 43hl2x5BSBz9vCJC; Sat, 19 Jan 2019 18:21:13 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id 2B8lMW7w35Gr; Sat, 19 Jan 2019 18:21:13 +0100 (CET) Received: from vm-hermes.si.c-s.fr (vm-hermes.si.c-s.fr [192.168.25.253]) by pegase1.c-s.fr (Postfix) with ESMTP id 43hl2x4D1Kz9vCJ9; Sat, 19 Jan 2019 18:21:13 +0100 (CET) Received: by vm-hermes.si.c-s.fr (Postfix, from userid 33) id 25AAE79; Sat, 19 Jan 2019 18:21:13 +0100 (CET) Received: from 37-170-18-222.coucou-networks.fr (37-170-18-222.coucou-networks.fr [37.170.18.222]) by messagerie.si.c-s.fr (Horde Framework) with HTTP; Sat, 19 Jan 2019 18:21:13 +0100 Date: Sat, 19 Jan 2019 18:21:13 +0100 Message-ID: <20190119182113.Horde.DK6jqX3cEzsvR0fKFZrY2g4@messagerie.si.c-s.fr> From: LEROY Christophe To: Michael Ellerman Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Mike Rapoport , Nicholas Piggin , Paul Mackerras , Benjamin Herrenschmidt Subject: Re: [PATCH v13 00/10] powerpc: Switch to CONFIG_THREAD_INFO_IN_TASK References: <87zhrx2bf1.fsf@concordia.ellerman.id.au> In-Reply-To: <87zhrx2bf1.fsf@concordia.ellerman.id.au> User-Agent: Internet Messaging Program (IMP) H5 (6.2.3) Content-Type: text/plain; charset=UTF-8; format=flowed; DelSp=Yes MIME-Version: 1.0 Content-Disposition: inline Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Michael Ellerman a écrit : > Christophe Leroy writes: > >> The purpose of this serie is to activate CONFIG_THREAD_INFO_IN_TASK which >> moves the thread_info into task_struct. >> >> Moving thread_info into task_struct has the following advantages: >> - It protects thread_info from corruption in the case of stack >> overflows. >> - Its address is harder to determine if stack addresses are >> leaked, making a number of attacks more difficult. >> >> Changes since v12: >> - Patch 1: Taken comment from Mike (re-introduced the 'panic' in >> case memblock allocation fails in setup_64.c >> - Patch 1: Added alloc_stack() function in setup_32.c to also >> panic in case of allocation failure. > > Hi Christophe, > > I can't get this series to boot on qemu mac99. I'm getting eg: Problem new with version 13 or it is the first time you test ? > > [ 0.981514] NFS: Registering the id_resolver key type > [ 0.981752] Key type id_resolver registered > [ 0.981868] Key type id_legacy registered > [ 0.995711] Unrecoverable exception 0 at 0 (msr=0) > [ 0.996091] Oops: Unrecoverable exception, sig: 6 [#1] > [ 0.996314] BE PAGE_SIZE=4K MMU=Hash PowerMac > [ 0.996617] Modules linked in: > [ 0.996869] CPU: 0 PID: 416 Comm: modprobe Not tainted > 5.0.0-rc2-gcc-7.3.0-00043-g53f2de798792 #342 Comm:modprobe ==> Something wrong with modules ? I never tested with CONFIG_MODULES. Christophe > [ 0.997138] NIP: 00000000 LR: 00000000 CTR: 00000000 > [ 0.997309] REGS: ef237f50 TRAP: 0000 Not tainted > (5.0.0-rc2-gcc-7.3.0-00043-g53f2de798792) > [ 0.997508] MSR: 00000000 <> CR: 00000000 XER: 00000000 > [ 0.997712] > [ 0.997712] GPR00: 00000000 ef238000 00000000 00000000 00000000 > 00000000 00000000 00000000 > [ 0.997712] GPR08: 00000000 00000000 00000000 00000000 00000000 > 00000000 c006477c ef13d8c0 > [ 0.997712] GPR16: 00000000 00000000 00000000 00000000 00000000 > 00000000 00000000 00000000 > [ 0.997712] GPR24: 00000000 00000000 00000000 00000000 00000000 > 00000000 00000000 00000000 > [ 0.998671] NIP [00000000] (null) > [ 0.998774] LR [00000000] (null) > [ 0.998895] Call Trace: > [ 0.999030] Instruction dump: > [ 0.999320] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX > XXXXXXXX XXXXXXXX > [ 0.999546] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX 60000000 XXXXXXXX > XXXXXXXX XXXXXXXX > [ 1.000023] ---[ end trace 925ea3419844fe68 ]--- > > I haven't had time to dig any further. > > cheers