Bug#756162: nonexistent target release makes "apt update" segfault
Package: apt
Version: 1.0.9.3
Followup-For: Bug #756162
I suspect this is the same underlying cause as the segfault that
I was about to report. When running apt update without a network
connection (such as right after suspend before wireless has come
back on line), apt update segfaults at the end of processing:
mithrandir:/root# apt update
Err http://linux.dropbox.com sid InRelease
Err http://ftp.us.debian.org experimental InRelease
Err http://ftp.us.debian.org unstable InRelease
Err http://ftp.us.debian.org experimental Release.gpg
Temporary failure resolving 'ftp.us.debian.org'
Err http://linux.dropbox.com sid Release.gpg
Temporary failure resolving 'linux.dropbox.com'
Err http://archives.eyrie.org unstable InRelease
Err http://ftp.us.debian.org unstable Release.gpg
Temporary failure resolving 'ftp.us.debian.org'
Err http://archives.eyrie.org unstable Release.gpg
Temporary failure resolving 'archives.eyrie.org'
Reading package lists... Done
Segmentation fault (core dumped)
This happens reliably every time I run apt update without a
network connection. My guess is that this is triggering the
same case of a reference to an underlying distribution that
doesn't exist in any package list (since downloading all
package lists failed).
Sadly, the stack trace is not horribly useful:
#0 0x00007f2cd1525980 in DoUpdate(CommandLine&) ()
from /usr/lib/x86_64-linux-gnu/libapt-private.so.0.0
#1 0x00007f2cd186efa6 in CommandLine::DispatchArg(CommandLine::Dispatch*, bool) () from /usr/lib/x86_64-linux-gnu/libapt-pkg.so.4.12
#2 0x00007f2cd1ccafce in ?? ()
#3 0x00007f2cd0954b45 in __libc_start_main (main=0x7f2cd1ccac90, argc=2,
argv=0x7fff5e043998, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fff5e043988) at libc-start.c:287
#4 0x00007f2cd1ccb137 in ?? ()
It's trivial to reproduce this by just turning off all
networking and then running apt update.
-- Package-specific info:
-- apt-config dump --
APT "";
APT::Architecture "amd64";
APT::Build-Essential "";
APT::Build-Essential:: "build-essential";
APT::Install-Recommends "0";
APT::Install-Suggests "0";
APT::Authentication "";
APT::Authentication::TrustCDROM "true";
APT::NeverAutoRemove "";
APT::NeverAutoRemove:: "^firmware-linux.*";
APT::NeverAutoRemove:: "^linux-firmware$";
APT::NeverAutoRemove:: "^linux-image-3\.16-3-amd64$";
APT::NeverAutoRemove:: "^linux-image-3\.16\.0-4-amd64$";
APT::NeverAutoRemove:: "^linux-headers-3\.16-3-amd64$";
APT::NeverAutoRemove:: "^linux-headers-3\.16\.0-4-amd64$";
APT::NeverAutoRemove:: "^linux-image-extra-3\.16-3-amd64$";
APT::NeverAutoRemove:: "^linux-image-extra-3\.16\.0-4-amd64$";
APT::NeverAutoRemove:: "^linux-signed-image-3\.16-3-amd64$";
APT::NeverAutoRemove:: "^linux-signed-image-3\.16\.0-4-amd64$";
APT::NeverAutoRemove:: "^kfreebsd-image-3\.16-3-amd64$";
APT::NeverAutoRemove:: "^kfreebsd-image-3\.16\.0-4-amd64$";
APT::NeverAutoRemove:: "^kfreebsd-headers-3\.16-3-amd64$";
APT::NeverAutoRemove:: "^kfreebsd-headers-3\.16\.0-4-amd64$";
APT::NeverAutoRemove:: "^gnumach-image-3\.16-3-amd64$";
APT::NeverAutoRemove:: "^gnumach-image-3\.16\.0-4-amd64$";
APT::NeverAutoRemove:: "^.*-modules-3\.16-3-amd64$";
APT::NeverAutoRemove:: "^.*-modules-3\.16\.0-4-amd64$";
APT::NeverAutoRemove:: "^.*-kernel-3\.16-3-amd64$";
APT::NeverAutoRemove:: "^.*-kernel-3\.16\.0-4-amd64$";
APT::NeverAutoRemove:: "^linux-backports-modules-.*-3\.16-3-amd64$";
APT::NeverAutoRemove:: "^linux-backports-modules-.*-3\.16\.0-4-amd64$";
APT::NeverAutoRemove:: "^linux-tools-3\.16-3-amd64$";
APT::NeverAutoRemove:: "^linux-tools-3\.16\.0-4-amd64$";
APT::VersionedKernelPackages "";
APT::VersionedKernelPackages:: "linux-image";
APT::VersionedKernelPackages:: "linux-headers";
APT::VersionedKernelPackages:: "linux-image-extra";
APT::VersionedKernelPackages:: "linux-signed-image";
APT::VersionedKernelPackages:: "kfreebsd-image";
APT::VersionedKernelPackages:: "kfreebsd-headers";
APT::VersionedKernelPackages:: "gnumach-image";
APT::VersionedKernelPackages:: ".*-modules";
APT::VersionedKernelPackages:: ".*-kernel";
APT::VersionedKernelPackages:: "linux-backports-modules-.*";
APT::VersionedKernelPackages:: "linux-tools";
APT::Never-MarkAuto-Sections "";
APT::Never-MarkAuto-Sections:: "metapackages";
APT::Never-MarkAuto-Sections:: "restricted/metapackages";
APT::Never-MarkAuto-Sections:: "universe/metapackages";
APT::Never-MarkAuto-Sections:: "multiverse/metapackages";
APT::Never-MarkAuto-Sections:: "oldlibs";
APT::Never-MarkAuto-Sections:: "restricted/oldlibs";
APT::Never-MarkAuto-Sections:: "universe/oldlibs";
APT::Never-MarkAuto-Sections:: "multiverse/oldlibs";
APT::Default-Release "unstable";
APT::Architectures "";
APT::Architectures:: "amd64";
APT::Compressor "";
APT::Compressor::. "";
APT::Compressor::.::Name ".";
APT::Compressor::.::Extension "";
APT::Compressor::.::Binary "";
APT::Compressor::.::Cost "1";
APT::Compressor::gzip "";
APT::Compressor::gzip::Name "gzip";
APT::Compressor::gzip::Extension ".gz";
APT::Compressor::gzip::Binary "gzip";
APT::Compressor::gzip::Cost "2";
APT::Compressor::gzip::CompressArg "";
APT::Compressor::gzip::CompressArg:: "-9n";
APT::Compressor::gzip::UncompressArg "";
APT::Compressor::gzip::UncompressArg:: "-d";
APT::Compressor::bzip2 "";
APT::Compressor::bzip2::Name "bzip2";
APT::Compressor::bzip2::Extension ".bz2";
APT::Compressor::bzip2::Binary "bzip2";
APT::Compressor::bzip2::Cost "3";
APT::Compressor::bzip2::CompressArg "";
APT::Compressor::bzip2::CompressArg:: "-9";
APT::Compressor::bzip2::UncompressArg "";
APT::Compressor::bzip2::UncompressArg:: "-d";
APT::Compressor::xz "";
APT::Compressor::xz::Name "xz";
APT::Compressor::xz::Extension ".xz";
APT::Compressor::xz::Binary "xz";
APT::Compressor::xz::Cost "4";
APT::Compressor::xz::CompressArg "";
APT::Compressor::xz::CompressArg:: "-6";
APT::Compressor::xz::UncompressArg "";
APT::Compressor::xz::UncompressArg:: "-d";
APT::Compressor::lzma "";
APT::Compressor::lzma::Name "lzma";
APT::Compressor::lzma::Extension ".lzma";
APT::Compressor::lzma::Binary "xz";
APT::Compressor::lzma::Cost "5";
APT::Compressor::lzma::CompressArg "";
APT::Compressor::lzma::CompressArg:: "--format=lzma";
APT::Compressor::lzma::CompressArg:: "-9";
APT::Compressor::lzma::UncompressArg "";
APT::Compressor::lzma::UncompressArg:: "--format=lzma";
APT::Compressor::lzma::UncompressArg:: "-d";
Dir "/";
Dir::State "var/lib/apt/";
Dir::State::lists "lists/";
Dir::State::cdroms "cdroms.list";
Dir::State::mirrors "mirrors/";
Dir::State::extended_states "extended_states";
Dir::State::status "/var/lib/dpkg/status";
Dir::Cache "var/cache/apt/";
Dir::Cache::archives "archives/";
Dir::Cache::srcpkgcache "srcpkgcache.bin";
Dir::Cache::pkgcache "pkgcache.bin";
Dir::Etc "etc/apt/";
Dir::Etc::sourcelist "sources.list";
Dir::Etc::sourceparts "sources.list.d";
Dir::Etc::vendorlist "vendors.list";
Dir::Etc::vendorparts "vendors.list.d";
Dir::Etc::main "apt.conf";
Dir::Etc::netrc "auth.conf";
Dir::Etc::parts "apt.conf.d";
Dir::Etc::preferences "preferences";
Dir::Etc::preferencesparts "preferences.d";
Dir::Etc::trusted "trusted.gpg";
Dir::Etc::trustedparts "trusted.gpg.d";
Dir::Bin "";
Dir::Bin::methods "/usr/lib/apt/methods";
Dir::Bin::solvers "";
Dir::Bin::solvers:: "/usr/lib/apt/solvers";
Dir::Bin::dpkg "/usr/bin/dpkg";
Dir::Bin::bzip2 "/bin/bzip2";
Dir::Bin::xz "/usr/bin/xz";
Dir::Bin::lzma "/usr/bin/xz";
Dir::Media "";
Dir::Media::MountPath "/media/cdrom";
Dir::Log "var/log/apt";
Dir::Log::Terminal "term.log";
Dir::Log::History "history.log";
Dir::Ignore-Files-Silently "";
Dir::Ignore-Files-Silently:: "~$";
Dir::Ignore-Files-Silently:: "\.disabled$";
Dir::Ignore-Files-Silently:: "\.bak$";
Dir::Ignore-Files-Silently:: "\.dpkg-[a-z]+$";
Dir::Ignore-Files-Silently:: "\.save$";
Dir::Ignore-Files-Silently:: "\.orig$";
Dir::Ignore-Files-Silently:: "\.distUpgrade$";
Acquire "";
Acquire::cdrom "";
Acquire::cdrom::mount "/media/cdrom";
Acquire::Languages "";
Acquire::Languages:: "en";
Acquire::Languages:: "none";
Aptitude "";
Aptitude::Recommends-Important "no";
DPkg "";
DPkg::Pre-Install-Pkgs "";
DPkg::Pre-Install-Pkgs:: "/usr/bin/apt-listchanges --apt || test $? -ne 10";
DPkg::Pre-Install-Pkgs:: "/usr/sbin/dpkg-preconfigure --apt || true";
DPkg::Tools "";
DPkg::Tools::Options "";
DPkg::Tools::Options::/usr/bin/apt-listchanges "";
DPkg::Tools::Options::/usr/bin/apt-listchanges::Version "2";
CommandLine "";
CommandLine::AsString "apt-config dump";
-- (no /etc/apt/preferences present) --
-- /etc/apt/sources.list --
# Repos managed by puppet.
-- System Information:
Debian Release: jessie/sid
Architecture: amd64 (x86_64)
Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages apt depends on:
ii debian-archive-keyring 2014.1
ii gnupg 1.4.18-4
ii libapt-pkg4.12 1.0.9.3
ii libc6 2.19-13
ii libgcc1 1:4.9.2-3
ii libstdc++6 4.9.2-3
apt recommends no packages.
Versions of packages apt suggests:
pn apt-doc <none>
ii aptitude 0.6.11-1+b1
ii dpkg-dev 1.17.22
ii python-apt 0.9.3.11
-- no debconf information
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