From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.bugs Subject: bug#36649: 27.0.50; pure space and pdumper Date: Mon, 17 May 2021 01:43:31 -0700 Organization: UCLA Computer Science Department Message-ID: <85567d83-7ec6-c5e7-81f2-74b0b310eefc@cs.ucla.edu> References: <87sg5bt1bp.fsf@gmail.com> <4c1248b8-88cc-ca06-6bc8-9f0bb9a98c98@cs.ucla.edu> <87mtt0hupl.fsf@gnus.org> <83mtt02dyz.fsf@gnu.org> <877dk3hoko.fsf@gnus.org> <87y2cjg9mu.fsf@gnus.org> <83a6oz3lpm.fsf@gnu.org> <87lf8jg8o2.fsf@gnus.org> <838s4j3l2e.fsf@gnu.org> <87h7j7g7ft.fsf@gnus.org> <878s4jg67i.fsf@gnus.org> <834kf73iim.fsf@gnu.org> <874kf7g54z.fsf@gnus.org> <8335ur3hu8.fsf@gnu.org> <83a6oy20bj.fsf@gnu.org> <87a6oupzn1.fsf@gnus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="32470"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 Cc: rpluim@gmail.com, stefan@marxist.se, schwab@linux-m68k.org, monnier@iro.umontreal.ca, pipcet@gmail.com, 36649@debbugs.gnu.org, akrl@sdf.org To: Lars Ingebrigtsen , Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Mon May 17 10:44:14 2021 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1liYrE-000862-0K for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 17 May 2021 10:44:12 +0200 Original-Received: from localhost ([::1]:54510 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1liYrC-0007rJ-LE for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 17 May 2021 04:44:10 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:54660) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1liYr4-0007qw-UR for bug-gnu-emacs@gnu.org; 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Mon, 17 May 2021 01:43:32 -0700 (PDT) In-Reply-To: <87a6oupzn1.fsf@gnus.org> Content-Language: en-US X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:206697 Archived-At: On 5/16/21 6:38 AM, Lars Ingebrigtsen wrote: > I thought we had ASLR switched on on GNU/Linux builds? If unexec is used on GNU/Linux, Emacs is supposed to switch ASLR off by=20 using "setfattr -n user.pax.flags -v er temacs", and if that doesn't=20 work by using the personality syscall and then re-execing itself (see=20 maybe_disable_address_randomization). I doubt whether it's worth spending much time debugging the problem,=20 since nobody uses unexec on GNU/Linux any more.