glibc __read_chk not a cancellation point

Hello jandryuk, 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.

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!

Hi, I upgraded my system to Kinetic in ~March, so I no longer have a setup
to test with. Kinetic's newer glibc with the change identified here works
for me.

On Tue, Jun 6, 2023, 4:02 PM Brian Murray <email address hidden>
wrote:

> Hello jandryuk, 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.
>
> ** Changed in: glibc (Ubuntu Jammy)
> Status: In Progress => Fix Committed
>
> ** Tags added: verification-needed verification-needed-jammy
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/2007796
>
> Title:
> glibc __read_chk not a cancellation point
>
> Status in glibc package in Ubuntu:
> Fix Released
> Status in glibc source package in Jammy:
> Fix Committed
> Status in glibc source package in Kinetic:
> Fix Released
>
> Bug description:
> [Impact]
> I'm working with Xen and libxenstore. libxenstore, when using a
> "watch", spawns a pthread (read_thread). When libxenstore shuts down, it
> pthread_cancel()s and pthread_join()s the "watch" thread.
>
> That thread never exits and the process shutdown hangs.
>
> read_threads is sitting in __read_chk(). In glibc 2.35, __read_chk is
> not a cancellation point, so the thread never reacts to the
> cancellation.
>
> Upstream glibc fixed it in 2.36 in
>
> https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=dc30acf20bd635d71cd4c84100e842fdf0429e48
>
> Here's the 2.35 disassembly - the lack of __pthread_enable_asynccancel()
> indicates the missing cancellation support:
> (gdb) disassemble
> Dump of assembler code for function __read_chk:
> 0x00007ffff7ea04d0 <+0>: endbr64
> 0x00007ffff7ea04d4 <+4>: cmp %rcx,%rdx
> 0x00007ffff7ea04d7 <+7>: ja 0x7ffff7ea0504 <__read_chk+52>
> 0x00007ffff7ea04d9 <+9>: xor %eax,%eax
> 0x00007ffff7ea04db <+11>: syscall
> => 0x00007ffff7ea04dd <+13>: cmp $0xfffffffffffff000,%rax
> 0x00007f...

Since I see evidence of the added regression test being successfully run in the package build logs, I'm marking this as verified.

Hello jandryuk, 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.

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!

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!

Marking as verified as the regression test has been run in the latest package build according to the logs.

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

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.