From nobody Fri Dec 10 17:35:47 2021 X-Original-To: freebsd-current@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 817EB18E73CB for ; Fri, 10 Dec 2021 17:36:01 +0000 (UTC) (envelope-from mw@semihalf.com) Received: from mail-lf1-x134.google.com (mail-lf1-x134.google.com [IPv6:2a00:1450:4864:20::134]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1D4" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4J9dNd2xwwz3lq8 for ; Fri, 10 Dec 2021 17:36:01 +0000 (UTC) (envelope-from mw@semihalf.com) Received: by mail-lf1-x134.google.com with SMTP id l22so19340370lfg.7 for ; Fri, 10 Dec 2021 09:36:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=semihalf-com.20210112.gappssmtp.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=1KeEhCSqBDaWeKxv3M/ArLBkL7IaBmjdBnYRbfG7LyE=; b=b/dlNJi2LWTSHjUmrw251KOzJLfZoaVLA0wndGt5MJkg/oU2O79+HuMtagOQI2npvn yyuWBA5y0Dt6lNCQ98+xicwtChmrhnEX93pbXXiyyyADdsICVqgvB78yPvMq0Gg8QXmW 9UHf3R+C9LISDG3WFt6HXXG6eMoiXBH08JoXtaoJUXhzrdy6d+cFC/oov2UgCPumkXa8 LKgVYM4wrHK+jJmIdTe0x7+winGchkLaDqGitc0zJ2VXviAIAl/hfHoFN+bAUUjh4IRq qcsO0ufn7cHIRTZsSPTh8S0yZwEW4ivkaJgQxU2aIS4++LlM0HFKWsV3+Gpz3e9ME6tA Okcw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=1KeEhCSqBDaWeKxv3M/ArLBkL7IaBmjdBnYRbfG7LyE=; b=mdetIJfDqzvIOGB5LJyo+uYY2SHazutAoVduAFqSCjFRCYDlE3zNvidXwr6ewmwYUb UJOmYgfsP3KUKmFd5TXD7BldWmWYudlmmhSk90LOcdHbOe9ZdJfpLg2WhH1m1NzSOq7q /FHE9fIDxdTWqjk8G6x0rmSIVkS2xagKxH3JF1yqBfgTnHvFwG/2egzytvnpzhqUXgiS ylTxGcfJ1Jz6WXJqxCESxqkIbPHpFLBsfCF0tTwdmC2ERA/chrxeLUEk1SXsqmuU5zqJ ErtlSmDwR3T3ZWBJ3PMIEthByqTD2lt9HFiu8lO6XpkDv6c3kTM4bF04xlKya6LrfTTv rkmA== X-Gm-Message-State: AOAM532uaNxH2pUyWw7JHKNE11JbToOceoBy5nHCX+Dkq1YyrjCUs+e/ 7sDfRh5+VNILPaLrxhKBm/3a48ilO6sTEWGtvU1jwQ== X-Google-Smtp-Source: ABdhPJwcMpZAhIH3QkeIfSA1PO0jWOKqp881UT2aYZ2Xa+TV5vjn1uMOnq54avFytNN3uzQS77CTngHSMN+q/E1dIxs= X-Received: by 2002:a05:6512:3d09:: with SMTP id d9mr14127476lfv.481.1639157759899; Fri, 10 Dec 2021 09:35:59 -0800 (PST) List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@freebsd.org MIME-Version: 1.0 References: <7101CA73-DCAD-4DEF-9861-C62789D22596@dons.net.au> In-Reply-To: <7101CA73-DCAD-4DEF-9861-C62789D22596@dons.net.au> From: Marcin Wojtas Date: Fri, 10 Dec 2021 18:35:47 +0100 Message-ID: Subject: Re: HEADS-UP: ASLR for 64-bit executables enabled by default on main To: "Daniel O'Connor" Cc: freebsd-current , Fabien Thomas , MARECHAL Boris , Rafal Jaworowski , Damien DEVILLE Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 4J9dNd2xwwz3lq8 X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; none X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[] X-ThisMailContainsUnwantedMimeParts: N Hi Daniel pt., 10 gru 2021 o 10:16 Daniel O'Connor napisa=C5=82(= a): > > > > > On 17 Nov 2021, at 09:00, Marcin Wojtas wrote: > > As of b014e0f15bc7 the ASLR (Address Space Layout > > Randomization) feature becomes enabled for the all 64-bit > > binaries by default. > > Firstly, thank your for your efforts here, it is appreciated :) > > I am finding that the lang/sdcc port is crashing with a seg fault and the= core dump is no help to me at all: > [freebsd14 7:06] /usr/ports/lang/sdcc/work/sdcc-4.0.0/device/lib >sudo gd= b ../../bin/sdcc sdcc.core > GNU gdb (GDB) 11.1 [GDB v11.1 for FreeBSD] > > Reading symbols from ../../bin/sdcc... > [New LWP 100122] > Core was generated by `../../bin/sdcc -I../../device/include -I../../devi= ce/include/mcs51 -mds390 --nos'. > Program terminated with signal SIGSEGV, Segmentation fault. > Invalid permissions for mapped object. > #0 0x0000000804e3fbc0 in setrlimit () from /lib/libc.so.7 > (gdb) info thread > Id Target Id Frame > * 1 LWP 100122 0x0000000804e3fbc0 in setrlimit () from /lib/lib= c.so.7 > (gdb) bt > #0 0x0000000804e3fbc0 in setrlimit () from /lib/libc.so.7 > Backtrace stopped: Cannot access memory at address 0x7fffff87fd08 > > If I disable ASLR (via proccontrol) then it does not crash, but I am not = sure how I can debug it further. > > I've raised a bug https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D260= 303 if you (or anyone else) has suggestions for what to try. > Thanks for filing the ticket. Let's continue the conversation there. Best regards, Marcin