ldd / ld-linux-x86-64.so.2 crashes with SIGSEGV when ran against certain shared libraries

[Rok Mandeljc]

[Impact]

On Ubuntu 22.04.1 LTS, `ldd` (or rather, the underlying `/lib64/ld-linux-x86-64.so.2`) crashes when ran against some of the python extension modules from PySide6 PyPI wheels for linux. This does not happen under 20.04 nor 22.10, and neither does it happen under Fedora 36 (which nominally uses the glibc of same version, 2.35).

When running jammy docker container, the crash does not happen as long as glib2 libraries are not installed (are unresolvable).

The problem was encountered when freezing a PySide6-based python application using pyinstaller, which uses `ldd` to perform binary analysis (and in cases like this, comes up empty, resulting in missing libraries).

Original bug report: https://github.com/pyinstaller/pyinstaller/issues/7197

The problem (at least in PyInstaller + PySide6 context) might become more widespread as `ubuntu-22.04` CI runners become more prevalent on the GitHub actions.

It has been fixed upstream in the following patch:
https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=10fe3cd309b32c003a6b98e08928e7d6007caecf

[Test Plan]

The patch includes tests for this. However, it's fairly easy to test on an installed system:

$ sudo apt install -y python3 python3-venv libglib2.0-0
$ python3 -m venv venv
$ . venv/bin/activate
$ pip install pyside6
$ LD_TRACE_LOADED_OBJECTS=1 /lib64/ld-linux-x86-64.so.2 venv/lib64/python3.10/site-packages/PySide6/QtQml.abi3.so

That last command should *NOT* segfault.

[Regression potential]

We're touching a fairly sensible part of the system here. Besides "ldd is totally broken"-type scenarios, there could be more subtle breakage due to changes in the load order of dynamic libraries (unlikely given the nature of the patch, though)

[Apport retracing service (apport)]

StacktraceTop:
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[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Rok Mandeljc (rok-mandeljc)]

So it turns out that glibc 2.35 in Fedora 36 is more tightly synced with release/2.35/master branch of glibc, and the commit that makes the difference is 10fe3cd309b32c003a6b98e08928e7d6007caecf

https://github.com/bminor/glibc/commit/10fe3cd309b32c003a6b98e08928e7d6007caecf

Patching Ubuntu's glibc 2.35-0ubuntu3.1 with fix from that commit fixes the segfault.

[Simon Chopin (schopin)]

Thanks for the analysis. We'll see about releasing a new SRU for Jammy soon-ish :)

[Brian Murray (brian-murray)]

Hello Rok, or anyone else affected,

Accepted glibc into jammy-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/glibc/2.35-0ubuntu3.2 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-jammy to verification-done-jammy. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-jammy. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Ubuntu SRU Bot (ubuntu-sru-bot)]

All autopkgtests for the newly accepted glibc (2.35-0ubuntu3.2) for jammy have finished running.
The following regressions have been reported in tests triggered by the package:

adsys/0.9.2~22.04.1 (armhf)
bbmap/38.95+dfsg-1 (armhf)
boost1.74/1.74.0-14ubuntu3 (armhf)
breezy/3.2.1+bzr7585-1build1 (armhf)
casync/2+20201210-1build1 (ppc64el)
cmake/3.22.1-1ubuntu1.22.04.1 (amd64, arm64, armhf)
cython/0.29.28-1ubuntu3 (i386)
dbus-test-runner/16.10.0~bzr100+repack1-4.1 (armhf)
exim4/4.95-4ubuntu2.2 (ppc64el)
fwupd/1.7.9-1~22.04.1 (armhf)
glib-networking/2.72.0-1 (i386)
golang-github-influxdata-tail/1.0.0+git20180327.c434825-4 (ppc64el)
golang-gogoprotobuf/1.3.2-1 (arm64)
grubzfs-testsuite/0.4.15build1 (amd64)
gtk+3.0/3.24.33-1ubuntu2 (i386)
gyoto/1.4.4-7build1 (amd64, arm64, s390x)
ksh93u+m/1.0.0~beta.2-1 (ppc64el)
libassuan/2.5.5-1build1 (amd64)
libflame/5.2.0-3ubuntu3 (s390x)
libite/2.5.1-1 (s390x)
linux-aws-5.19/5.19.0-1027.28~22.04.1 (amd64, arm64)
linux-azure-5.19/5.19.0-1027.30~22.04.2 (amd64)
linux-gcp-5.19/5.19.0-1026.28~22.04.1 (arm64)
linux-gke/5.15.0-1034.39 (arm64)
linux-hwe-5.19/5.19.0-44.45~22.04.1 (amd64)
linux-lowlatency-hwe-5.19/5.19.0-1026.27~22.04.1 (amd64)
linux-oracle-5.19/5.19.0-1025.28~22.04.1 (amd64)
mercurial/6.1.1-1ubuntu1 (amd64)
mtail/3.0.0~rc48-3 (ppc64el)
mutter/42.5-0ubuntu1 (amd64)
mypy/0.942-1ubuntu1 (armhf)
mysql-8.0/8.0.33-0ubuntu0.22.04.2 (s390x)
netgen/6.2.2006+really6.2.1905+dfsg-5build1 (armhf)
notcurses/3.0.6+dfsg.1-1 (armhf)
pango1.0/1.50.6+ds-2ubuntu1 (i386)
phcpack/2.4.85+dfsg-5build1 (arm64)
pinentry/1.1.1-1build2 (i386)
puma/5.5.2-2ubuntu2 (amd64, arm64)
pycryptodome/3.11.0+dfsg1-3build1 (i386)
pygobject/3.42.1-0ubuntu1 (i386)
python-evdev/1.4.0+dfsg-1build2 (i386)
python-llfuse/1.3.8+dfsg-2build1 (armhf)
python-lz4/3.1.3+dfsg-1build3 (i386)
python3.10/3.10.6-1~22.04.2ubuntu1.1 (arm64)
pyyaml/5.4.1-1ubuntu1 (i386)
r-bioc-rhdf5/2.38.0+dfsg-2 (amd64)
r-cran-randomfieldsutils/1.1.0-1 (armhf)
r-cran-spc/1:0.6.5-1 (armhf)
rsync/3.2.7-0ubuntu0.22.04.2 (i386)
ruby-nio4r/2.5.8-2 (amd64)
ruby-nokogiri/1.13.1+dfsg-2 (amd64)
ruby-prof/1.3.1-2build2 (amd64, ppc64el)
rustc/1.65.0+dfsg0ubuntu1-0ubuntu0.22.04.1 (arm64)
seqkit/2.1.0+ds-1 (arm64, s390x)
stunnel4/3:5.63-1build1 (i386)
swtpm/0.6.3-0ubuntu3.2 (s390x)
systemd/249.11-0ubuntu3.9 (amd64, arm64, ppc64el, s390x)
taptempo/1.4.5-1 (amd64)
texinfo/6.8-4build1 (armhf)
ubiquity/22.04.19 (amd64, arm64, armhf, ppc64el)
udisks2/2.9.4-1ubuntu2 (arm64)
utox/0.18.1-1build1 (armhf)
vlc/3.0.16-1build7 (i386)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/jammy/update_excuses.html#glibc

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

[Rok Mandeljc (rok-mandeljc)]

I confirm that installing libc6 and libc-bin 2.35-0ubuntu3.2 from jammy-proposed fixes the problem.

Tested with

$ sudo apt install -y python3 python3-venv libglib2.0-0
$ python3 -m venv venv
$ . venv/bin/activate
$ pip install pyside6
$ ldd venv/lib64/python3.10/site-packages/PySide6/QtQml.abi3.so

in jammy docker container.

With the updated package, the previously-affected PySide6 tests now also pass on PyInstaller's CI when ran on GitHub Actions ubuntu-22.04 runner:
https://github.com/rokm/pyinstaller/actions/runs/5231817181/jobs/9446191542

[Brian Murray (brian-murray)]

Hello Rok, or anyone else affected,

Accepted glibc into jammy-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/glibc/2.35-0ubuntu3.3 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-jammy to verification-done-jammy. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-jammy. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Ubuntu SRU Bot (ubuntu-sru-bot)]

All autopkgtests for the newly accepted glibc (2.35-0ubuntu3.2) for jammy have finished running.
The following regressions have been reported in tests triggered by the package:

linux-aws-6.2/6.2.0-1007.7~22.04.1 (arm64)
linux-azure-6.2/6.2.0-1007.7~22.04.1 (arm64)
linux-oracle-5.19/5.19.0-1025.28~22.04.1 (arm64)
mysql-8.0/8.0.33-0ubuntu0.22.04.2 (s390x)
ubiquity/22.04.19 (amd64, arm64, armhf, ppc64el)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/jammy/update_excuses.html#glibc

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

[Rok Mandeljc (rok-mandeljc)]

I confirm that libc6 and libc-bin 2.35-0ubuntu3.3 from jammy-proposed fixes the problem. Tested with ldd example from original report in a jammy docker container.

[Ubuntu SRU Bot (ubuntu-sru-bot)]

All autopkgtests for the newly accepted glibc (2.35-0ubuntu3.3) for jammy have finished running.
The following regressions have been reported in tests triggered by the package:

adsys/0.9.2~22.04.1 (arm64)
datefudge/1.24 (arm64)
dbus/1.12.20-2ubuntu4.1 (armhf)
dpdk/21.11.3-0ubuntu0.22.04.1 (arm64)
ganeti/3.0.2-1ubuntu1 (armhf)
gcc-9/9.5.0-1ubuntu1~22.04 (armhf)
gjs/1.72.4-0ubuntu0.22.04.1 (amd64)
golang-github-canonical-go-dqlite/1.10.1-1 (arm64)
golang-github-influxdata-tail/1.0.0+git20180327.c434825-4 (amd64)
golang-github-xenolf-lego/4.1.3-3ubuntu1.22.04.1 (armhf)
golang-gogoprotobuf/1.3.2-1 (amd64, s390x)
google-osconfig-agent/20230504.00-0ubuntu1~22.04.0 (armhf)
gvfs/1.48.2-0ubuntu1 (amd64)
hilive/2.0a-3build3 (arm64)
hyphy/2.5.36+dfsg-1 (amd64)
kmediaplayer/5.92.0-0ubuntu1 (armhf)
libclass-methodmaker-perl/2.24-2build2 (armhf)
libflame/5.2.0-3ubuntu3 (arm64)
libimage-sane-perl/5-1build3 (s390x)
libuev/2.4.0-1.1 (s390x)
linux-aws-6.2/6.2.0-1009.9~22.04.2 (arm64)
linux-azure-5.19/5.19.0-1027.30~22.04.2 (arm64)
linux-azure-6.2/6.2.0-1009.9~22.04.2 (arm64)
linux-gcp-5.19/5.19.0-1030.32~22.04.1 (arm64)
linux-gke/5.15.0-1039.44 (arm64)
linux-hwe-5.19/5.19.0-50.50 (arm64)
linux-lowlatency/5.15.0-79.88 (arm64)
linux-nvidia-6.2/6.2.0-1006.6~22.04.2 (arm64)
linux-nvidia-tegra/5.15.0-1015.15 (arm64)
linux-oem-5.17/5.17.0-1035.36 (amd64)
linux-oracle-5.19/5.19.0-1027.30 (arm64)
linux-xilinx-zynqmp/5.15.0-1023.27 (arm64)
log4cxx/0.12.1-4 (armhf)
netplan.io/0.105-0ubuntu2~22.04.3 (arm64)
notcurses/3.0.6+dfsg.1-1 (armhf)
php-luasandbox/4.0.2-3build1 (ppc64el)
prometheus/2.31.2+ds1-1ubuntu1.22.04.2 (s390x)
qcustomplot/2.0.1+dfsg1-5 (armhf)
r-cran-mice/3.14.0-1 (armhf)
r-cran-randomfields/3.3.14-1 (armhf)
r-cran-sys/3.4-1 (s390x)
ruby-rblineprof/0.3.7-2build3 (arm64)
rustc/1.66.1+dfsg0ubuntu1-0ubuntu0.22.04.1 (arm64)
samba/2:4.15.13+dfsg-0ubuntu1.2 (s390x)
stunnel4/3:5.63-1build1 (ppc64el)
swtpm/0.6.3-0ubuntu3.2 (arm64)
tmux/3.2a-4ubuntu0.2 (ppc64el)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/jammy/update_excuses.html#glibc

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

[Launchpad Janitor (janitor)]

This bug was fixed in the package glibc - 2.35-0ubuntu3.3

---------------
glibc (2.35-0ubuntu3.3) jammy; urgency=medium

  * Drop SVE patches due to kernal-related performance regression
  * Fix the armhf stripping exception for ld.so (LP: #1927192)

glibc (2.35-0ubuntu3.2) jammy; urgency=medium

  * d/rules.d/debhelper.mk: fix permissions of libc.so (LP: #1989082)
  * Cherry-picks from upstream:
    - d/p/lp1999551/*: arm64 memcpy optimization (LP: #1999551)
    - d/p/lp1995362*.patch: Fix ldd segfault with missing libs (LP: #1995362)
    - d/p/lp2007796*: Fix missing cancellation point in pthread (LP: #2007796)
    - d/p/lp2007599*: add new tunables for s390x (LP: #2007599)
    - d/p/lp2011421/*: Fix crash on TDX-enabled platforms (LP: #2011421)
    - d/p/lp1992159*: Fix socket.h headers for non-GNU compilers (LP: #1992159)

 -- Simon Chopin <email address hidden> Wed, 26 Jul 2023 10:27:54 +0200

[Steve Langasek (vorlon)]

The verification of the Stable Release Update for glibc has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.