Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753435AbcKQL13 (ORCPT ); Thu, 17 Nov 2016 06:27:29 -0500 Received: from ozlabs.org ([103.22.144.67]:48741 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751598AbcKQL11 (ORCPT ); Thu, 17 Nov 2016 06:27:27 -0500 From: Michael Ellerman To: Denis Kirjanov , Christophe Leroy Cc: Benjamin Herrenschmidt , Paul Mackerras , Scott Wood , Nicolas Pitre , "linuxppc-dev\@lists.ozlabs.org" , "linux-kernel\@vger.kernel.org" Subject: Re: [PATCH 0/2] powerpc: stack protector (-fstack-protector) support In-Reply-To: References: User-Agent: Notmuch/0.21 (https://notmuchmail.org) Date: Thu, 17 Nov 2016 22:27:24 +1100 Message-ID: <8760nmxs6b.fsf@concordia.ellerman.id.au> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1064 Lines: 33 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 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