From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Gerd =?UTF-8?Q?M=C3=B6llmann?= Newsgroups: gmane.emacs.bugs Subject: bug#58042: 29.0.50; ASAN use-after-free in re_match_2_internal Date: Mon, 26 Sep 2022 07:13:05 +0200 Message-ID: References: <835yhcom6g.fsf@gnu.org> <831qs0okx4.fsf@gnu.org> <83mtaom0a9.fsf@gnu.org> <83illbnafh.fsf@gnu.org> <83fsgfn8sb.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="37010"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (darwin) Cc: 58042@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Mon Sep 26 07:14:12 2022 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 1ocgRX-0009Sv-HZ for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 26 Sep 2022 07:14:11 +0200 Original-Received: from localhost ([::1]:48094 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ocgRV-0000FH-Uh for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 26 Sep 2022 01:14:09 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:46918) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ocgRO-0000F2-CL for bug-gnu-emacs@gnu.org; Mon, 26 Sep 2022 01:14:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:49856) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1ocgRO-00034B-4p for bug-gnu-emacs@gnu.org; Mon, 26 Sep 2022 01:14:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1ocgRN-0002bG-Rn for bug-gnu-emacs@gnu.org; Mon, 26 Sep 2022 01:14:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Gerd =?UTF-8?Q?M=C3=B6llmann?= Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 26 Sep 2022 05:14:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 58042 X-GNU-PR-Package: emacs Original-Received: via spool by 58042-submit@debbugs.gnu.org id=B58042.16641691969924 (code B ref 58042); Mon, 26 Sep 2022 05:14:01 +0000 Original-Received: (at 58042) by debbugs.gnu.org; 26 Sep 2022 05:13:16 +0000 Original-Received: from localhost ([127.0.0.1]:48934 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ocgQe-0002a0-Gk for submit@debbugs.gnu.org; Mon, 26 Sep 2022 01:13:16 -0400 Original-Received: from mail-ej1-f48.google.com ([209.85.218.48]:36571) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ocgQb-0002Zk-U0 for 58042@debbugs.gnu.org; Mon, 26 Sep 2022 01:13:14 -0400 Original-Received: by mail-ej1-f48.google.com with SMTP id 13so11618160ejn.3 for <58042@debbugs.gnu.org>; Sun, 25 Sep 2022 22:13:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:user-agent:message-id:date :references:in-reply-to:subject:cc:to:from:from:to:cc:subject:date; bh=0qWr3B3Mt+2u6ySxlIguIZmivhATAVvth3KC3Ydgdqk=; b=DBp7BcaSTsd9sfuN9VgznOYRJoHvuQttztI0QSuFXt0H3sOGWXlr3RYmyO/aQuJeNw 9BBHxGUPUDYD29mcko54wqKgHyYx6ksEhY9wQ1kE1Hz9jKHW57l0bTL51BCaQjxcJUGb hB3n9GqzW0q67dOqF3b7ylB5ruamy4ioKLwhvdw2Rua2knnxF3/+5D117msM1+YLaRng sZznvigiiOSPecYXHrNIZh7yWsg5PqhxANNusra9z+VmNFbvvxZSylD3WO643jXQSbJV tOiPdPGajAyRCVOa9EC++dly4iKJAnmJglTEr8mP4S7vxSnkHBW79naPodHMAYm6Srw9 yLPA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:user-agent:message-id:date :references:in-reply-to:subject:cc:to:from:x-gm-message-state:from :to:cc:subject:date; bh=0qWr3B3Mt+2u6ySxlIguIZmivhATAVvth3KC3Ydgdqk=; b=dlfPpsGow3+mj6dKltVlaxxMYkBlComDw+b07oV4p6tyjWZ/ZYs0aiaLmEmF9o8MsV IY5ZujHbDw6Slxzy2SVa+ZsmgfnQ1cMQIebcA8BmUqBptKIKRQveYC70Fhxw5zhg8PkQ Mhr2p3UtYUWmtpvBRmhgUhWywgPX2sz+bpTYgSH2DhlqJVLtrOD5vtAQLSRUiY+8/gFf jyVMwYRamVE87WbBF3ktbQos0AsLnkzE/O5vtvxmDYThe1/nxi/KXQvTuOkq0be4l4ut aSQfP2PESTUOjenzd08I04UhwL21ZvYVqTqFhpHN60xE55o5Sa9lGrcibtDfkroITgXn Sn+A== X-Gm-Message-State: ACrzQf1q28IhlXCPFSiKKWsuVqtj/76wvkYO5hDo2H+yLVRudMKcTPor 2TqosSjEysdtZAKKNfM+qpDzsdehi2Q= X-Google-Smtp-Source: AMsMyM7kiJJsoL6dnIdrsnMisbP5tIB9P9qEXJkqMoUs8OVnwgBPQd7Q3tzRS4+J39MAvGuHVhFM8Q== X-Received: by 2002:a17:906:8a53:b0:781:6ee9:db96 with SMTP id gx19-20020a1709068a5300b007816ee9db96mr16164844ejc.301.1664169187328; Sun, 25 Sep 2022 22:13:07 -0700 (PDT) Original-Received: from Mini.fritz.box (pd9e36b1b.dip0.t-ipconnect.de. [217.227.107.27]) by smtp.gmail.com with ESMTPSA id p4-20020a170906604400b0073de0506745sm7776998ejj.197.2022.09.25.22.13.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 25 Sep 2022 22:13:06 -0700 (PDT) In-Reply-To: <83fsgfn8sb.fsf@gnu.org> (Eli Zaretskii's message of "Sun, 25 Sep 2022 11:43:48 +0300") 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:243620 Archived-At: Eli Zaretskii writes: >> From: Gerd M=C3=B6llmann >> Cc: 58042@debbugs.gnu.org >> Date: Sun, 25 Sep 2022 10:28:48 +0200 >>=20 >> So, the question seems to be what scenario would create a live string >> that points into a freed sdata struct. > > That sounds highly improbable to me. But stranger things have > happened... Yeah :-/. In the meantime, and in an attempt to get some more information, I've made me a script that starts Emacs in LLDB, with my init file, and exits Emacs after a delay, and then does things in LLDB depending on what happened. I left that script running over night, and the result wasn't very helpful. After almost 2 hours of running, I got an ASAN error in copyRect:(NSRect)srcRect to:(NSPoint)dest, nsterm.m. And LLDB crashed again. This is with HEAD 568920a5b703e80c43e1b6f31778ea5776218a1e. I meanwhile wonder what that all means. An "invalid display" that isn't reproducible, a crash in regexp, a crash in copyRect, and then the crashes in LLDB itself. I think I'll let that sit for a bit.