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=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_NEOMUTT 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 A7DE1C43382 for ; Fri, 28 Sep 2018 13:41:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6A2C02168B for ; Fri, 28 Sep 2018 13:41:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6A2C02168B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=debian.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729187AbeI1UEx (ORCPT ); Fri, 28 Sep 2018 16:04:53 -0400 Received: from cheddar.halon.org.uk ([93.93.131.118]:54218 "EHLO cheddar.halon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726603AbeI1UEx (ORCPT ); Fri, 28 Sep 2018 16:04:53 -0400 X-Greylist: delayed 1309 seconds by postgrey-1.27 at vger.kernel.org; Fri, 28 Sep 2018 16:04:52 EDT Received: from bsmtp by cheddar.halon.org.uk with local-bsmtp (Exim 4.89) (envelope-from <93sam@debian.org>) id 1g5sfm-0002V2-RM; Fri, 28 Sep 2018 14:19:10 +0100 Received: from steve by tack.einval.org with local (Exim 4.89) (envelope-from <93sam@debian.org>) id 1g5sep-0002TO-Dh; Fri, 28 Sep 2018 14:18:11 +0100 Date: Fri, 28 Sep 2018 14:18:11 +0100 From: Steve McIntyre <93sam@debian.org> To: Will Deacon Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, arnd@arndb.de, linux@dominikbrodowski.net, ebiederm@xmission.com, akpm@linux-foundation.org, viro@zeniv.linux.org.uk, oleg@redhat.com, dave.martin@arm.com Subject: Re: [RESEND PATCH 0/2] Don't use SIGMINSTKSZ when enforcing alternative signal stack size for compat tasks Message-ID: <20180928131805.aunjzciyvaad7z5a@tack.einval.com> References: <1536158083-30166-1-git-send-email-will.deacon@arm.com> <20180926103627.b6kxzdmqqsj3545h@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180926103627.b6kxzdmqqsj3545h@arm.com> X-attached: none User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [ Re-sending without the corporate footer garbage... ] On Wed, Sep 05, 2018 at 03:34:41PM +0100, Will Deacon wrote: >Hi all, > >This is a resend of: > > http://lists.infradead.org/pipermail/linux-arm-kernel/2018-July/593559.html > >now based on 4.19-rc2. > >The Debian folks have observed a failure in the 32-bit arm glibc testsuite >when running under a 64-bit kernel. They tracked this down to sigaltstack(2) >enforcing the alternative signal stack to be at least SIGMINSTKSZ bytes, >which is higher for native arm64 tasks than compat 32-bit tasks. > >These patches resolve the issue by allowing an architecture to define >COMPAT_SIGMINSTKSZ for compat tasks, which is then used by the sigaltstack >checking code. > >Feedback welcome, Apologies for the delayed response here - conference travel etc . got in the way... I've just tested and I can confirm that this patchset fixes our reported bug (as in https://bugs.debian.org/904385). Thanks Will! Tested-by: Steve McIntyre <93sam@debian.org> -- Steve McIntyre <93sam@debian.org>