Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753331AbcKRMnv (ORCPT ); Fri, 18 Nov 2016 07:43:51 -0500 Received: from mail-yw0-f196.google.com ([209.85.161.196]:33225 "EHLO mail-yw0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752126AbcKRMnt (ORCPT ); Fri, 18 Nov 2016 07:43:49 -0500 MIME-Version: 1.0 X-Originating-IP: [195.54.192.103] In-Reply-To: <8760nmxs6b.fsf@concordia.ellerman.id.au> References: <8760nmxs6b.fsf@concordia.ellerman.id.au> From: Denis Kirjanov Date: Fri, 18 Nov 2016 15:43:48 +0300 Message-ID: Subject: Re: [PATCH 0/2] powerpc: stack protector (-fstack-protector) support To: Michael Ellerman Cc: Christophe Leroy , Benjamin Herrenschmidt , Paul Mackerras , Scott Wood , Nicolas Pitre , "linuxppc-dev@lists.ozlabs.org" , "linux-kernel@vger.kernel.org" Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1243 Lines: 41 On 11/17/16, Michael Ellerman wrote: > Denis Kirjanov writes: > >> On Friday, September 30, 2016, Christophe Leroy >> wrote: >> >>> Add HAVE_CC_STACKPROTECTOR to powerpc. This is copied from ARM. >>> >>> Not tested on PPC64, compile ok with ppc64_ >> >> >> Hi Christophe, >> >> are you going to test it on ppc64? If not, I can take it Not yet, I've broken my test machine :/ I need some time to recover > > Did you get around to testing it? > > It seems to be working here: > > root@mpe-ubuntu-le:/sys/kernel/debug/provoke-crash# echo CORRUPT_STACK > > DIRECT > Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: > c000000000671ed8 > > CPU: 1 PID: 3835 Comm: bash Not tainted > 4.9.0-rc5-compiler_gcc-6.2.0-00075-gf41db6c7a3c8-dirty #464 > Call Trace: > [c0000000dbf73a30] [c000000000541728] dump_stack+0xb8/0x100 (unreliable) > > [c0000000dbf73a70] [c000000000219ba8] panic+0x14c/0x320 > [c0000000dbf73b10] [c0000000000c27ec] __stack_chk_fail+0x2c/0x30 > [c0000000dbf73b70] [c000000000671ed8] lkdtm_CORRUPT_STACK+0x88/0x90 > [c0000000dbf73bf0] [6161616161616161] 0x6161616161616161 > Rebooting in 10 seconds.. > > > cheers >