From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752375Ab1GWN7b (ORCPT ); Sat, 23 Jul 2011 09:59:31 -0400 Received: from mail-fx0-f52.google.com ([209.85.161.52]:37315 "EHLO mail-fx0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751471Ab1GWN71 convert rfc822-to-8bit (ORCPT ); Sat, 23 Jul 2011 09:59:27 -0400 From: Arkadiusz Miskiewicz To: Andy Lutomirski Subject: 3.1 git: ld: error: dot may not move backward Date: Sat, 23 Jul 2011 15:59:23 +0200 User-Agent: KMail/1.13.7 (Linux/3.0.0-final-dirty; KDE/4.6.5; x86_64; ; ) Cc: Ingo Molnar , Linux Kernel Mailing List MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 8BIT Message-Id: <201107231559.23537.a.miskiewicz@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, current git (bbd9d6f7fbb0305c9a592bf05a32e87eb364a4ff) [arekm@ixion-pld linux]$ gcc -v Reading specs from /usr/lib64/gcc/x86_64-pld-linux/4.6.1/specs COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-pld-linux/4.6.1/lto-wrapper Target: x86_64-pld-linux Configured with: ../configure --prefix=/usr --with-local-prefix=/usr/local -- libdir=/usr/lib64 --libexecdir=/usr/lib64 --infodir=/usr/share/info -- mandir=/usr/share/man --x-libraries=/usr/lib64 --enable-checking=release -- enable-gnu-unique-object --enable-shared --enable-threads=posix --enable- linker-build-id --enable-linux-futex --enable- languages=c,c++,fortran,objc,obj-c++,ada,java --enable-libgomp --enable- libmudflap --enable-c99 --enable-long-long --enable-decimal-float=yes -- enable-nls --disable-werror --enable-lto --enable-plugin --disable-cld --with- gnu-as --with-gnu-ld --with-demangler-in-ld --with-system-zlib --with- slibdir=/lib64 --without-system-libunwind --enable-cmath --with-long- double-128 --with-gxx-include-dir=/usr/include/c++/4.6.1 --disable-libstdcxx- pch --enable-__cxa_atexit --enable-libstdcxx-allocator=new --enable-libjava- multilib=no --disable-gconf-peer --enable-java-awt=xlib,gtk --enable-libgcj -- enable-libgcj-multifile --enable-libgcj-database --enable-gtk-cairo --enable- jni --enable-xmlj --enable-bootstrap --with-pkgversion=PLD-Linux --with- bugurl=http://bugs.pld-linux.org x86_64-pld-linux Thread model: posix gcc version 4.6.1 20110714 (release) (PLD-Linux) [arekm@ixion-pld linux]$ ld -v GNU gold (Linux/GNU Binutils 2.21.53.0.1.20110716) 1.11 and at make bzImage ld -m elf_x86_64 --build-id -o .tmp_vmlinux1 -T arch/x86/kernel/vmlinux.lds arch/x86/kernel/head_64.o arch/x86/kernel/head64.o arch/x86/kernel/head.o arch/x86/kernel/init_task.o init/built-in.o --start-group usr/built-in.o arch/x86/built-in.o kernel/built-in.o mm/built-in.o fs/built-in.o ipc/built-in.o security/built-in.o crypto/built-in.o block/built-in.o lib/lib.a arch/x86/lib/lib.a lib/built-in.o arch/x86/lib/built-in.o drivers/built-in.o sound/built-in.o firmware/built-in.o arch/x86/pci/built- in.o arch/x86/power/built-in.o arch/x86/video/built-in.o net/built-in.o -- end-group ld: error: dot may not move backward ld: error: dot may not move backward ld: error: load segment overlap [0x1800000 -> 0x18850e0] and [0x1884000 -> 0x1884c10] bisect ends with: 9fd67b4ed0714ab718f1f9bd14c344af336a6df7 is the first bad commit commit 9fd67b4ed0714ab718f1f9bd14c344af336a6df7 Author: Andy Lutomirski Date: Sun Jun 5 13:50:19 2011 -0400 x86-64: Give vvars their own page Move vvars out of the vsyscall page into their own page and mark it NX. Without this patch, an attacker who can force a daemon to call some fixed address could wait until the time contains, say, 0xCD80, and then execute the current time. Signed-off-by: Andy Lutomirski Cc: Jesper Juhl Cc: Borislav Petkov Cc: Linus Torvalds Cc: Arjan van de Ven Cc: Jan Beulich Cc: richard -rw- weinberger Cc: Mikael Pettersson Cc: Andi Kleen Cc: Brian Gerst Cc: Louis Rilling Cc: Valdis.Kletnieks@vt.edu Cc: pageexec@freemail.hu Link: http://lkml.kernel.org/r/b1460f81dc4463d66ea3f2b5ce240f58d48effec.1307292171.git.luto@mit.edu Signed-off-by: Ingo Molnar :040000 040000 24ebbf4a851e35bfe4c65074f9e51a20c6ac54c8 288ec01e5b8ccff746962f40e0e9310a31800c5d M arch bisect run success [arekm@ixion-pld linux]$ git bisect log git bisect start # bad: [bbd9d6f7fbb0305c9a592bf05a32e87eb364a4ff] Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 git bisect bad bbd9d6f7fbb0305c9a592bf05a32e87eb364a4ff # good: [02f8c6aee8df3cdc935e9bdd4f2d020306035dbe] Linux 3.0 git bisect good 02f8c6aee8df3cdc935e9bdd4f2d020306035dbe # good: [cd6340199f65cad63262db0fd561bdcfd69df3bd] bnx2: Close device if tx_timeout reset fails git bisect good cd6340199f65cad63262db0fd561bdcfd69df3bd # good: [22a3b9771117d566def0150ea787fcc95f16e724] Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid git bisect good 22a3b9771117d566def0150ea787fcc95f16e724 # good: [4d4abdcb1dee03a4f9d6d2021622ed07e14dfd17] Merge branch 'perf-core- for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip git bisect good 4d4abdcb1dee03a4f9d6d2021622ed07e14dfd17 # good: [3e0b8df79ddb8955d2cce5e858972a9cfe763384] Merge branch 'x86-uv-for- linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip git bisect good 3e0b8df79ddb8955d2cce5e858972a9cfe763384 # good: [12ad3ab66103e6582ca69c0c9de18b13487eaaef] superblock: move pin_sb_for_writeback() to fs/super.c git bisect good 12ad3ab66103e6582ca69c0c9de18b13487eaaef # good: [10d9f309d88ca7f47133d57e99b72810f119f75b] get rid of useless dget_parent() in btrfs rename() and link() git bisect good 10d9f309d88ca7f47133d57e99b72810f119f75b # bad: [98eedc3a9dbf90cecb91093d2a7fa083942b7d13] Document the vDSO and add a reference parser git bisect bad 98eedc3a9dbf90cecb91093d2a7fa083942b7d13 # bad: [5cec93c216db77c45f7ce970d46283bcb1933884] x86-64: Emulate legacy vsyscalls git bisect bad 5cec93c216db77c45f7ce970d46283bcb1933884 # bad: [0d7b8547fb67d5c2a7d954c56b3715b0e708be4a] x86-64: Remove kernel.vsyscall64 sysctl git bisect bad 0d7b8547fb67d5c2a7d954c56b3715b0e708be4a # good: [8b4777a4b50cb0c84c1152eac85d24415fb6ff7d] x86-64: Document some of entry_64.S git bisect good 8b4777a4b50cb0c84c1152eac85d24415fb6ff7d # bad: [9fd67b4ed0714ab718f1f9bd14c344af336a6df7] x86-64: Give vvars their own page git bisect bad 9fd67b4ed0714ab718f1f9bd14c344af336a6df7 -- Arkadiusz Miśkiewicz PLD/Linux Team arekm / maven.pl http://ftp.pld-linux.org/