From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#41357: 28.0.50; GC may miss to mark calle safe register content Date: Sun, 17 May 2020 20:28:04 +0300 Message-ID: <837dxabhej.fsf@gnu.org> References: <83pnb2bmk2.fsf@gnu.org> <8f0c7763-9210-aa29-7cee-945b8494d827@cs.ucla.edu> <83d072bihd.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="61085"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 41357@debbugs.gnu.org, eggert@cs.ucla.edu To: Andrea Corallo Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sun May 17 19:29:20 2020 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 1jaN6G-000Foi-1H for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 17 May 2020 19:29:20 +0200 Original-Received: from localhost ([::1]:57148 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jaN6E-0007k7-Rx for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 17 May 2020 13:29:18 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:34124) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jaN5y-0007jN-NT for bug-gnu-emacs@gnu.org; Sun, 17 May 2020 13:29:04 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:33115) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jaN5x-0006Os-Ti for bug-gnu-emacs@gnu.org; Sun, 17 May 2020 13:29:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1jaN5x-0007S4-QM for bug-gnu-emacs@gnu.org; Sun, 17 May 2020 13:29:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 17 May 2020 17:29:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 41357 X-GNU-PR-Package: emacs X-Debbugs-Original-Cc: bug-gnu-emacs@gnu.org, eggert@cs.ucla.edu Original-Received: via spool by submit@debbugs.gnu.org id=B.158973649828593 (code B ref -1); Sun, 17 May 2020 17:29:01 +0000 Original-Received: (at submit) by debbugs.gnu.org; 17 May 2020 17:28:18 +0000 Original-Received: from localhost ([127.0.0.1]:44661 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1jaN5F-0007R7-TY for submit@debbugs.gnu.org; Sun, 17 May 2020 13:28:18 -0400 Original-Received: from lists.gnu.org ([209.51.188.17]:55118) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1jaN5E-0007Qy-76 for submit@debbugs.gnu.org; Sun, 17 May 2020 13:28:16 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:34040) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jaN5C-0007Hl-QT for bug-gnu-emacs@gnu.org; Sun, 17 May 2020 13:28:16 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:35005) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jaN5B-0006Ey-7y; Sun, 17 May 2020 13:28:14 -0400 Original-Received: from [176.228.60.248] (port=2373 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1jaN59-00076T-EB; Sun, 17 May 2020 13:28:12 -0400 In-Reply-To: (message from Andrea Corallo on Sun, 17 May 2020 17:21:54 +0000) 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:180495 Archived-At: > From: Andrea Corallo > Cc: Paul Eggert , bug-gnu-emacs@gnu.org > Date: Sun, 17 May 2020 17:21:54 +0000 > > But I just wanted to point out that I think this is clearly a bug in our > code, and it can trigger depending on decision of the tool-chain we have > no control over. I'm not saying it is not a bug. I'm saying that we've lived with this bug for a very long time, so if it is real, it is definitely very-very rare. If we put every bugfix we could think of into the release branch, we will never release Emacs 27. Never. Because there's always one more bug. > I think it should be trated as we would do if we discover and verify an > "access out of bounds" or "read after free". Depends on the circumstances.