Hi, after running "/usr/bin/revdep-rebuild.sh" from =app-portage/gentoolkit-0.3.2-r1::gentoo I noticed that dmesg logged hundreds of > ld-linux.so.2[114261]: segfault at 4 ip 000000005661fe77 sp 00000000ff96c5c0 error 4 in ld-2.23.so[56615000+22000] messages and my directory where I save core dumps (which was empty before) contained 622 files like "ld-linux.so.2.32483.1480792708". I was able to trace the problem down to files in "/usr/lib64/debug/". It crashes in ldd's try_trace function. You can reproduce this problem when you emerge =sys-libs/glibc-2.23-r3:2.2::gentoo with an ENV file like CFLAGS="${CFLAGS} -ggdb" CXXFLAGS="${CXXFLAGS} -ggdb" FEATURES="${FEATURES} splitdebug" FEATURES="${FEATURES} compressdebug" Now just run # LD_TRACE_LOADED_OBJECTS=1 LD_WARN=yes LD_BIND_NOW=yes LD_VERBOSE= /lib/ld-linux.so.2 /usr/lib64/debug/usr/lib32/gconv/CP770.so.debug statically linked Segmentation fault (core dumped) Backtrace: Core was generated by `/lib/ld-linux.so.2 /usr/lib64/debug/usr/lib32/gconv/CP770.so.debug'. Program terminated with signal SIGSEGV, Segmentation fault. #0 0x565d1e77 in _dl_relocate_object (scope=0x565eaae0, reloc_mode=33554432, consider_profiling=0) at dl-reloc.c:232 232 dl-reloc.c: No such file or directory. (gdb) bt #0 0x565d1e77 in _dl_relocate_object (scope=0x565eaae0, reloc_mode=33554432, consider_profiling=0) at dl-reloc.c:232 #1 0x565c7cfa in relocate_doit (a=0xffe90170) at rtld.c:475 #2 0x565d623a in _dl_receive_error (fct=fct@entry=0x565c7b70 <print_unresolved>, operate=operate@entry=0x565c7ce0 <relocate_doit>, args=args@entry=0xffe90170) at dl-error.c:217 #3 0x565ca8e4 in dl_main (phdr=0xf7787034, phnum=7, user_entry=0xffe901cc, auxv=0xffe90324) at rtld.c:1831 #4 0x565dd1e0 in _dl_sysdep_start (start_argptr=0xffe90250, dl_main=0x565c8460 <dl_main>) at ../elf/dl-sysdep.c:249 #5 0x565cb9a1 in _dl_start_final (arg=0xffe90250) at rtld.c:307 #6 _dl_start (arg=0xffe90250) at rtld.c:413 #7 0x565c7a37 in _start () # emerge --info Portage 2.3.2 (python 3.5.2-final-0, default/linux/amd64/13.0, gcc-5.4.0, glibc-2.23-r3, 4.8.12-gentoo x86_64) ================================================================= System uname: Linux-4.8.12-gentoo-x86_64-Intel-R-_Core-TM-_i7-3770K_CPU_@_3.50GHz-with-gentoo-2.3 KiB Mem: 8138620 total, 7000716 free KiB Swap: 1048572 total, 1048572 free Timestamp of repository gentoo: Sat, 03 Dec 2016 10:51:22 +0000 sh dash 0.5.9.1-r1 ld GNU ld (Gentoo 2.27 p1.0) 2.27 app-shells/bash: 4.4_p5-r1::gentoo dev-java/java-config: 2.2.0-r3::gentoo dev-lang/perl: 5.24.1_rc4::gentoo dev-lang/python: 2.7.12::gentoo, 3.4.5::gentoo, 3.5.2::gentoo dev-util/cmake: 3.7.1::gentoo dev-util/pkgconfig: 0.29.1::gentoo sys-apps/baselayout: 2.3::gentoo sys-apps/openrc: 0.22.4::gentoo sys-apps/sandbox: 2.10-r2::gentoo sys-devel/autoconf: 2.69-r2::gentoo sys-devel/automake: 1.13.4-r1::gentoo, 1.14.1-r1::gentoo, 1.15-r2::gentoo sys-devel/binutils: 2.27::gentoo sys-devel/gcc: 5.4.0::gentoo sys-devel/gcc-config: 1.8-r1::gentoo sys-devel/libtool: 2.4.6-r2::gentoo sys-devel/make: 4.2.1::gentoo sys-kernel/linux-headers: 4.4::gentoo (virtual/os-headers) sys-libs/glibc: 2.23-r3::gentoo ABI="amd64" ABI_X86="64" ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="* -@EULA" ACCEPT_PROPERTIES="*" ACCEPT_RESTRICT="*" ARCH="amd64" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -march=ivybridge -mtune=ivybridge -mno-xsaveopt -frecord-gcc-switches" CFLAGS_amd64="-m64" CFLAGS_x32="-mx32" CFLAGS_x86="-m32" CHOST="x86_64-pc-linux-gnu" CHOST_amd64="x86_64-pc-linux-gnu" CHOST_x32="x86_64-pc-linux-gnux32" CHOST_x86="i686-pc-linux-gnu" COLLISION_IGNORE="/lib/modules/* *.py[co] *$py.class */dropin.cache" CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt" CPU_FLAGS_X86="aes avx mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" CURL_SSL="gnutls" CXXFLAGS="-O2 -pipe -march=ivybridge -mtune=ivybridge -mno-xsaveopt -frecord-gcc-switches" DEFAULT_ABI="amd64" EDITOR="/bin/nano" ELIBC="glibc" EPREFIX="" EROOT="/" FCFLAGS="-O2 -pipe -march=ivybridge -mtune=ivybridge -mno-xsaveopt -frecord-gcc-switches" FEATURES="assume-digests binpkg-logs cgroup config-protect-if-modified distlocks downgrade-backup ebuild-locks fixlafiles ipc-sandbox merge-sync network-sandbox news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-O2 -pipe -march=ivybridge -mtune=ivybridge -mno-xsaveopt -frecord-gcc-switches" GCC_SPECS="" GRUB_PLATFORMS="" GUILE_LOAD_PATH="/usr/share/guile/2.0" HOME="/root" INFOPATH="/usr/share/info:/usr/share/gcc-data/x86_64-pc-linux-gnu/5.4.0/info:/usr/share/binutils-data/x86_64-pc-linux-gnu/2.27/info" INPUT_DEVICES="keyboard mouse evdev" IUSE_IMPLICIT="abi_x86_64 prefix prefix-guest" JAVAC="/etc/java-config-2/current-system-vm/bin/javac" JAVA_HOME="/etc/java-config-2/current-system-vm" JDK_HOME="/etc/java-config-2/current-system-vm" KERNEL="linux" L10N="en en-US de de-DE fr" LANG="en_US.UTF-8" LC_MESSAGES="C" LC_NUMERIC="de_DE.UTF-8" LC_PAPER="de_DE.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" LDFLAGS_amd64="-m elf_x86_64" LDFLAGS_x32="-m elf32_x86_64" LDFLAGS_x86="-m elf_i386" LIBDIR_amd64="lib64" LIBDIR_amd64_fbsd="lib64" LIBDIR_arm="lib" LIBDIR_arm64="lib64" LIBDIR_n32="lib32" LIBDIR_n64="lib64" LIBDIR_o32="lib" LIBDIR_ppc="lib32" LIBDIR_ppc64="lib64" LIBDIR_s390="lib32" LIBDIR_s390x="lib64" LIBDIR_sparc32="lib32" LIBDIR_sparc64="lib64" LIBDIR_x32="libx32" LIBDIR_x86="lib32" LIBDIR_x86_fbsd="lib32" LINGUAS="en de fr" LOGNAME="root" MAIL="/var/mail/root" MAKEOPTS="--jobs 6" MULTILIB_ABIS="amd64 x86" NOCOLOR="true" OFFICE_IMPLEMENTATION="libreoffice" OPENCL_PROFILE="mesa" OPENGL_PROFILE="xorg-x11" ORACLE_HOME="/usr/lib64/oracle/12.1/client" PAGER="/usr/bin/less" PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/bin:/usr/x86_64-pc-linux-gnu/gcc-bin/5.4.0" PHP_TARGETS="php5-6" PWD="/root" PYTHONDONTWRITEBYTECODE="1" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4 python3_5" QT_GRAPHICSSYSTEM="raster" ROOT="/" ROOTPATH="/opt/bin:/usr/x86_64-pc-linux-gnu/gcc-bin/5.4.0" RUBY_TARGETS="ruby22" SHELL="/bin/bash" SHLVL="2" SSH_TTY="/dev/pts/0" SYMLINK_LIB="yes" TERM="screen" TMUX="/tmp/tmux-0/default,4645,0" TMUX_PANE="%2" TNS_ADMIN="/etc/oracle/" USER="root" USERLAND="GNU" VIDEO_CARDS="vmware"
running ld-linux directly on splitdebug files is expected to crash. that's simply WAI -- there's no real code in there to execute. however, ldd shouldn't have tried in the first place because the files are supposed to not be +x. revdep-rebuild also should have ignored splitdebug files since tracking their deps makes no sense. so let's back up: (1) are those files installed +x ? what if you delete them by hand and re-emerge them ? pick a small program rather than having to rebuild glibc all the time. (2) if they aren't +x, then we can bounce this over to revdep-rebuild.
(In reply to SpanKY from comment #1) > so let's back up: > (1) are those files installed +x ? what if you delete them by hand and > re-emerge them ? pick a small program rather than having to rebuild glibc > all the time. I re-emerged app-admin/rsyslog. No, no +x ...and revdep-rebuild.sh logs that (via ldd), from "/var/cache/revdep-rebuild/3_errors.rr": > ldd: warning: you do not have execution permission for `/usr/lib64/debug/usr/lib64/rsyslog/imuxsock.so.debug' > [...] # stat /usr/lib64/debug/usr/lib64/rsyslog/imuxsock.so.debug File: /usr/lib64/debug/usr/lib64/rsyslog/imuxsock.so.debug Size: 54336 Blocks: 112 IO Block: 4096 regular file Device: fe02h/65026d Inode: 183892 Links: 1 Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2016-12-06 04:08:31.613820443 +0100 Modify: 2016-12-06 02:59:25.144287589 +0100 Change: 2016-12-06 02:59:27.183310257 +0100 Birth: - > (2) if they aren't +x, then we can bounce this over to revdep-rebuild. Please proceed.
looks like we already have such a bug report open :( *** This bug has been marked as a duplicate of bug 364689 ***
