overflow bug in wcsncmp_avx2

[Simon Chopin]

[Impact]

See https://sourceware.org/bugzilla/show_bug.cgi?id=28755

Note that we're only impacted by the avx2 issue, the evex-optimized version isn't present in the 2.31 branch.

[Test case]

> test_wcsncmp.c cat <<EOF
#include <wchar.h>
#include <assert.h>

int
main(int argc, char ** argv) {
    assert(__wcsncmp_avx2(L"abc", L"abd", (1UL << 62)) != 0);
}
EOF
gcc -static -o test_wcsncmp test_wcsncmp.c
./test_scsncmp

[Regression potential]

The patch is contained within the AVX-2 optimized routine, but it could still cause introduce a new bug there. In addition, we could see performance regressions.

[Goldstein-w-n (goldstein-w-n)]

Similiar to [BZ 27974](https://sourceware.org/bugzilla/show_bug.cgi?id=27974). The multiply of length by sizeof (wchar_t) can overflow if length is >= 2^62 which can lead to incorrect results.

For example:

#include <wchar.h>
int
main(int argc, char ** argv) {
    assert(__wcsncmp_evex(L"abc", L"abd", (1UL << 62)) != 0);
    assert(__wcsncmp_avx2(L"abc", L"abd", (1UL << 62)) != 0);
}

Will fail on either assert.

[Goldstein-w-n (goldstein-w-n)]

Fix proposed in the following patches:

avx2: https://patchwork.sourceware<email address hidden>/
evex: https://patchwork.sourceware<email address hidden>/

[Goldstein-w-n (goldstein-w-n)]

Fixed in

commit ddf0992cf57a93200e0c782e2a94d0733a5a0b87
Author: Noah Goldstein <email address hidden>
Date: Sun Jan 9 16:02:21 2022 -0600

    x86: Fix __wcsncmp_avx2 in strcmp-avx2.S [BZ# 28755]

and

commit 7e08db3359c86c94918feb33a1182cd0ff3bb10b
Author: Noah Goldstein <email address hidden>
Date: Sun Jan 9 16:02:28 2022 -0600

    x86: Fix __wcsncmp_evex in strcmp-evex.S [BZ# 28755]

[Cvs-commit (cvs-commit)]

The release/2.34/master branch has been updated by H.J. Lu <email address hidden>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=72123e1b56f53f9205bb105f8a62d0869b837b22

commit 72123e1b56f53f9205bb105f8a62d0869b837b22
Author: H.J. Lu <email address hidden>
Date: Wed Jan 26 20:20:43 2022 -0800

    NEWS: Add a bug entry for BZ #28755

[Cvs-commit (cvs-commit)]

The release/2.33/master branch has been updated by H.J. Lu <email address hidden>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=86c153d0922a6da3263f0ade42573bd405d8edee

commit 86c153d0922a6da3263f0ade42573bd405d8edee
Author: H.J. Lu <email address hidden>
Date: Wed Jan 26 20:28:51 2022 -0800

    NEWS: Add a bug fix entry for BZ #28755

[Cvs-commit (cvs-commit)]

The release/2.32/master branch has been updated by H.J. Lu <email address hidden>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=40eebb02ccbc2d621e796795d5994fe7483b679f

commit 40eebb02ccbc2d621e796795d5994fe7483b679f
Author: H.J. Lu <email address hidden>
Date: Wed Jan 26 21:00:25 2022 -0800

    NEWS: Add a bug fix entry for BZ #28755

[Cvs-commit (cvs-commit)]

The release/2.31/master branch has been updated by H.J. Lu <email address hidden>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5b136510856f3742b58eb5e2de0cada7e9e95630

commit 5b136510856f3742b58eb5e2de0cada7e9e95630
Author: H.J. Lu <email address hidden>
Date: Thu Jan 27 05:16:30 2022 -0800

    NEWS: Add a bug fix entry for BZ #28755

[Cvs-commit (cvs-commit)]

The release/2.30/master branch has been updated by H.J. Lu <email address hidden>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=9d868841f870c22c05e5ce11900afc9abd8fda02

commit 9d868841f870c22c05e5ce11900afc9abd8fda02
Author: H.J. Lu <email address hidden>
Date: Thu Jan 27 05:31:02 2022 -0800

    NEWS: Add a bug fix entry for BZ #28755

[Cvs-commit (cvs-commit)]

The release/2.29/master branch has been updated by H.J. Lu <email address hidden>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=2f3fb944b311b67e609ed79478cc1737f6066af9

commit 2f3fb944b311b67e609ed79478cc1737f6066af9
Author: H.J. Lu <email address hidden>
Date: Thu Jan 27 05:34:02 2022 -0800

    NEWS: Add a bug fix entry for BZ #28755

[Cvs-commit (cvs-commit)]

The release/2.28/master branch has been updated by H.J. Lu <email address hidden>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=43c27a754bd417726032006d0a564d946994554e

commit 43c27a754bd417726032006d0a564d946994554e
Author: H.J. Lu <email address hidden>
Date: Thu Jan 27 07:30:10 2022 -0800

    NEWS: Add a bug fix entry for BZ #28755

[Hjl-tools (hjl-tools)]

Fixed for 2.35 and all release branches.

[Cvs-commit (cvs-commit)]

The master branch has been updated by H.J. Lu <email address hidden>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=aa5a720056d37cf24924c138a3dbe6dace98e97c

commit aa5a720056d37cf24924c138a3dbe6dace98e97c
Author: H.J. Lu <email address hidden>
Date: Thu Feb 17 08:10:35 2022 -0800

    string: Add a testcase for wcsncmp with SIZE_MAX [BZ #28755]

    Verify that wcsncmp (L("abc"), L("abd"), SIZE_MAX) == 0. The new test
    fails without

    commit ddf0992cf57a93200e0c782e2a94d0733a5a0b87
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:21 2022 -0600

        x86: Fix __wcsncmp_avx2 in strcmp-avx2.S [BZ# 28755]

    and

    commit 7e08db3359c86c94918feb33a1182cd0ff3bb10b
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:28 2022 -0600

        x86: Fix __wcsncmp_evex in strcmp-evex.S [BZ# 28755]

    This is for BZ #28755.

    Reviewed-by: Sunil K Pandey <email address hidden>

[Cvs-commit (cvs-commit)]

The release/2.35/master branch has been updated by H.J. Lu <email address hidden>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=a30807b7db924d31681e9c6e98e78f2f46a2640c

commit a30807b7db924d31681e9c6e98e78f2f46a2640c
Author: H.J. Lu <email address hidden>
Date: Thu Feb 17 08:10:35 2022 -0800

    string: Add a testcase for wcsncmp with SIZE_MAX [BZ #28755]

    Verify that wcsncmp (L("abc"), L("abd"), SIZE_MAX) == 0. The new test
    fails without

    commit ddf0992cf57a93200e0c782e2a94d0733a5a0b87
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:21 2022 -0600

        x86: Fix __wcsncmp_avx2 in strcmp-avx2.S [BZ# 28755]

    and

    commit 7e08db3359c86c94918feb33a1182cd0ff3bb10b
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:28 2022 -0600

        x86: Fix __wcsncmp_evex in strcmp-evex.S [BZ# 28755]

    This is for BZ #28755.

    Reviewed-by: Sunil K Pandey <email address hidden>

    (cherry picked from commit aa5a720056d37cf24924c138a3dbe6dace98e97c)

[Cvs-commit (cvs-commit)]

The release/2.34/master branch has been updated by H.J. Lu <email address hidden>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=04d60ce0f21ffe2a4add148cb37a1942dbad64e2

commit 04d60ce0f21ffe2a4add148cb37a1942dbad64e2
Author: H.J. Lu <email address hidden>
Date: Thu Feb 17 08:10:35 2022 -0800

    string: Add a testcase for wcsncmp with SIZE_MAX [BZ #28755]

    Verify that wcsncmp (L("abc"), L("abd"), SIZE_MAX) == 0. The new test
    fails without

    commit ddf0992cf57a93200e0c782e2a94d0733a5a0b87
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:21 2022 -0600

        x86: Fix __wcsncmp_avx2 in strcmp-avx2.S [BZ# 28755]

    and

    commit 7e08db3359c86c94918feb33a1182cd0ff3bb10b
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:28 2022 -0600

        x86: Fix __wcsncmp_evex in strcmp-evex.S [BZ# 28755]

    This is for BZ #28755.

    Reviewed-by: Sunil K Pandey <email address hidden>

    (cherry picked from commit aa5a720056d37cf24924c138a3dbe6dace98e97c)

[Cvs-commit (cvs-commit)]

The release/2.33/master branch has been updated by H.J. Lu <email address hidden>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=cb922428dc7c5260ea84de482ffe05d2ea766199

commit cb922428dc7c5260ea84de482ffe05d2ea766199
Author: H.J. Lu <email address hidden>
Date: Thu Feb 17 08:10:35 2022 -0800

    string: Add a testcase for wcsncmp with SIZE_MAX [BZ #28755]

    Verify that wcsncmp (L("abc"), L("abd"), SIZE_MAX) == 0. The new test
    fails without

    commit ddf0992cf57a93200e0c782e2a94d0733a5a0b87
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:21 2022 -0600

        x86: Fix __wcsncmp_avx2 in strcmp-avx2.S [BZ# 28755]

    and

    commit 7e08db3359c86c94918feb33a1182cd0ff3bb10b
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:28 2022 -0600

        x86: Fix __wcsncmp_evex in strcmp-evex.S [BZ# 28755]

    This is for BZ #28755.

    Reviewed-by: Sunil K Pandey <email address hidden>

    (cherry picked from commit aa5a720056d37cf24924c138a3dbe6dace98e97c)

[Cvs-commit (cvs-commit)]

The release/2.32/master branch has been updated by H.J. Lu <email address hidden>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=0f8a2390000c4e9a152b5f6cf8220f2560c01e74

commit 0f8a2390000c4e9a152b5f6cf8220f2560c01e74
Author: H.J. Lu <email address hidden>
Date: Thu Feb 17 08:10:35 2022 -0800

    string: Add a testcase for wcsncmp with SIZE_MAX [BZ #28755]

    Verify that wcsncmp (L("abc"), L("abd"), SIZE_MAX) == 0. The new test
    fails without

    commit ddf0992cf57a93200e0c782e2a94d0733a5a0b87
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:21 2022 -0600

        x86: Fix __wcsncmp_avx2 in strcmp-avx2.S [BZ# 28755]

    and

    commit 7e08db3359c86c94918feb33a1182cd0ff3bb10b
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:28 2022 -0600

        x86: Fix __wcsncmp_evex in strcmp-evex.S [BZ# 28755]

    This is for BZ #28755.

    Reviewed-by: Sunil K Pandey <email address hidden>

    (cherry picked from commit aa5a720056d37cf24924c138a3dbe6dace98e97c)

[Cvs-commit (cvs-commit)]

The release/2.31/master branch has been updated by H.J. Lu <email address hidden>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=775c05b28c1883c5860f582cca68abf9036d9ace

commit 775c05b28c1883c5860f582cca68abf9036d9ace
Author: H.J. Lu <email address hidden>
Date: Thu Feb 17 08:10:35 2022 -0800

    string: Add a testcase for wcsncmp with SIZE_MAX [BZ #28755]

    Verify that wcsncmp (L("abc"), L("abd"), SIZE_MAX) == 0. The new test
    fails without

    commit ddf0992cf57a93200e0c782e2a94d0733a5a0b87
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:21 2022 -0600

        x86: Fix __wcsncmp_avx2 in strcmp-avx2.S [BZ# 28755]

    and

    commit 7e08db3359c86c94918feb33a1182cd0ff3bb10b
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:28 2022 -0600

        x86: Fix __wcsncmp_evex in strcmp-evex.S [BZ# 28755]

    This is for BZ #28755.

    Reviewed-by: Sunil K Pandey <email address hidden>

    (cherry picked from commit aa5a720056d37cf24924c138a3dbe6dace98e97c)

[Cvs-commit (cvs-commit)]

The release/2.30/master branch has been updated by H.J. Lu <email address hidden>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=70522b1c1d1ffa5e3bd55aa3c064ea93a330bde9

commit 70522b1c1d1ffa5e3bd55aa3c064ea93a330bde9
Author: H.J. Lu <email address hidden>
Date: Thu Feb 17 08:10:35 2022 -0800

    string: Add a testcase for wcsncmp with SIZE_MAX [BZ #28755]

    Verify that wcsncmp (L("abc"), L("abd"), SIZE_MAX) == 0. The new test
    fails without

    commit ddf0992cf57a93200e0c782e2a94d0733a5a0b87
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:21 2022 -0600

        x86: Fix __wcsncmp_avx2 in strcmp-avx2.S [BZ# 28755]

    and

    commit 7e08db3359c86c94918feb33a1182cd0ff3bb10b
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:28 2022 -0600

        x86: Fix __wcsncmp_evex in strcmp-evex.S [BZ# 28755]

    This is for BZ #28755.

    Reviewed-by: Sunil K Pandey <email address hidden>

    (cherry picked from commit aa5a720056d37cf24924c138a3dbe6dace98e97c)

[Cvs-commit (cvs-commit)]

The release/2.29/master branch has been updated by H.J. Lu <email address hidden>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=a486152569be7ccdd748f669631285e1a16f2e73

commit a486152569be7ccdd748f669631285e1a16f2e73
Author: H.J. Lu <email address hidden>
Date: Thu Feb 17 08:10:35 2022 -0800

    string: Add a testcase for wcsncmp with SIZE_MAX [BZ #28755]

    Verify that wcsncmp (L("abc"), L("abd"), SIZE_MAX) == 0. The new test
    fails without

    commit ddf0992cf57a93200e0c782e2a94d0733a5a0b87
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:21 2022 -0600

        x86: Fix __wcsncmp_avx2 in strcmp-avx2.S [BZ# 28755]

    and

    commit 7e08db3359c86c94918feb33a1182cd0ff3bb10b
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:28 2022 -0600

        x86: Fix __wcsncmp_evex in strcmp-evex.S [BZ# 28755]

    This is for BZ #28755.

    Reviewed-by: Sunil K Pandey <email address hidden>

    (cherry picked from commit aa5a720056d37cf24924c138a3dbe6dace98e97c)

[Cvs-commit (cvs-commit)]

The release/2.28/master branch has been updated by H.J. Lu <email address hidden>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=9e050d1370587e808bc7bc3d151c5beb417120cb

commit 9e050d1370587e808bc7bc3d151c5beb417120cb
Author: H.J. Lu <email address hidden>
Date: Thu Feb 17 08:10:35 2022 -0800

    string: Add a testcase for wcsncmp with SIZE_MAX [BZ #28755]

    Verify that wcsncmp (L("abc"), L("abd"), SIZE_MAX) == 0. The new test
    fails without

    commit ddf0992cf57a93200e0c782e2a94d0733a5a0b87
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:21 2022 -0600

        x86: Fix __wcsncmp_avx2 in strcmp-avx2.S [BZ# 28755]

    and

    commit 7e08db3359c86c94918feb33a1182cd0ff3bb10b
    Author: Noah Goldstein <email address hidden>
    Date: Sun Jan 9 16:02:28 2022 -0600

        x86: Fix __wcsncmp_evex in strcmp-evex.S [BZ# 28755]

    This is for BZ #28755.

    Reviewed-by: Sunil K Pandey <email address hidden>

    (cherry picked from commit aa5a720056d37cf24924c138a3dbe6dace98e97c)

[Brian Murray (brian-murray)]

Hello Simon, or anyone else affected,

Accepted glibc into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/glibc/2.31-0ubuntu9.10 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-focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-focal. 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 (2.31-0ubuntu9.10) for focal have finished running.
The following regressions have been reported in tests triggered by the package:

4ti2/1.6.9+ds-2build1 (armhf)
android-platform-external-libunwind/8.1.0+r23-2 (armhf)
android-platform-frameworks-native/1:8.1.0+r23-2build1 (armhf)
apparmor/unknown (armhf)
apport/2.20.11-0ubuntu27.27 (armhf)
at-spi2-core/2.36.0-2 (armhf)
atk1.0/2.35.1-1ubuntu2 (armhf)
augustus/unknown (armhf)
autodock-vina/unknown (armhf)
autopilot-gtk/1.6.0 (armhf)
bgw-replstatus/1.0.4 (armhf)
biosquid/1.9g+cvs20050121-11 (armhf)
blackbox/0.70.1-38 (armhf)
bomstrip/9-13 (armhf)
borgbackup/1.1.15-1~ubuntu1.20.04.1 (armhf)
bosh/0.6-10 (armhf)
botch/0.22-3 (armhf)
brlaser/6-1build1 (armhf)
burp/2.2.18-2 (armhf)
butt/unknown (armhf)
cargo/0.66.0+ds0ubuntu0.libgit2-0ubuntu0.20.04 (armhf)
ceph/15.2.17-0ubuntu0.20.04.4 (armhf)
chafa/1.2.1-1 (armhf)
clearcut/1.0.9-5 (armhf)
consulfs/0.2.1-1 (armhf)
coturn/4.5.1.1-1.1ubuntu0.20.04.2 (armhf)
dune-common/2.6.0-4build1 (armhf)
fpc/3.0.4+dfsg-23 (arm64)
frameworkintegration/5.68.0-0ubuntu1 (armhf)
heaptrack/1.1.0+20180922.gitf752536-4build1 (armhf)
jsonnet/unknown (armhf)
kbibtex/0.8.1-1ubuntu5 (armhf)
kholidays/1:5.68.0-0ubuntu1 (armhf)
kiconthemes/5.68.0-0ubuntu1 (armhf)
kitemmodels/5.68.0-0ubuntu1 (armhf)
kpty/5.68.0-0ubuntu1 (armhf)
libdbd-pg-perl/3.10.4-1 (amd64)
libgdata/0.17.12-1 (armhf)
libtk-tablematrix-perl/1.23-7 (armhf)
linux-gcp-5.15/5.15.0-1036.44~20.04.1 (arm64)
linux-gke-5.15/5.15.0-1036.41~20.04.1 (arm64)
linux-lowlatency-hwe-5.15/5.15.0-75.82~20.04.1 (arm64)
linux-oracle-5.15/5.15.0-1037.43~20.04.1 (arm64)
magicrescue/1.1.10-3 (armhf)
mercurial/5.3.1-1ubuntu1 (amd64, armhf, ppc64el)
modemmanager-qt/5.68.0-0ubuntu1 (armhf)
node-ws/7.2.1-3 (armhf)
octave-image/2.12.0-2 (armhf)
osmo-mgw/1.4.0-1 (armhf)
php-excimer/1.0.0~git20190913.d82eaf7-1build1 (arm64)
polkit-qt-1/0.113.0-0ubuntu2 (armhf)
qcustomplot/2.0.1+dfsg1-1build1 (armhf)
qutip/4.4.1-6build1 (amd64)
r-cran-ps/1.3.2-2 (armhf)
ruby-bootsnap/1.4.6-1 (amd64)
ruby-standalone/2.7~2 (armhf)
ruby2.7/2.7.0-5ubuntu1.11 (armhf, s390x)
sks/1.1.6-14 (s390x)
systemd/245.4-4ubuntu3.22 (armhf)
threadweaver/5.68.0-0ubuntu1 (armhf)
tomb/2.7+dfsg2-1 (amd64)
umockdev/0.14.1-1ubuntu0.1 (armhf)

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/focal/update_excuses.html#glibc

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

Thank you!

[Simon Chopin (schopin)]

Verified in a fresh LXD container:

root@focal-glibc:~# gcc -static -o test_wcsncmp test_wcsncmp.c
In file included from test_wcsncmp.c:2:
test_wcsncmp.c: In function ‘main’:
test_wcsncmp.c:6:12: warning: implicit declaration of function ‘__wcsncmp_avx2’ [-Wimplicit-function-declaration]
    6 | assert(__wcsncmp_avx2(L"abc", L"abd", (1UL << 62)) != 0);
      | ^~~~~~~~~~~~~~
root@focal-glibc:~# ./test_wcsncmp && echo OK
OK

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

All autopkgtests for the newly accepted glibc (2.31-0ubuntu9.10) for focal have finished running.
The following regressions have been reported in tests triggered by the package:

cargo/0.66.0+ds0ubuntu0.libgit2-0ubuntu0.20.04 (armhf)

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/focal/update_excuses.html#glibc

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

Thank you!

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

All autopkgtests for the newly accepted glibc (2.31-0ubuntu9.11) for focal have finished running.
The following regressions have been reported in tests triggered by the package:

dune-common/2.6.0-4build1 (armhf)
khtml/5.68.0-0ubuntu1 (armhf)
kitemmodels/5.68.0-0ubuntu1 (armhf)
kpeople/5.68.0-0ubuntu1 (armhf)
kplotting/5.68.0-0ubuntu1 (armhf)
kpty/5.68.0-0ubuntu1 (armhf)
kxmlgui/5.68.0-0ubuntu2 (armhf)
linux-nvidia-tegra-5.15/5.15.0-1015.15~20.04.1 (arm64)
netplan.io/0.104-0ubuntu2~20.04.2 (s390x)
nfs-utils/1:1.3.4-2.5ubuntu3.4 (amd64)
ruby-stackprof/0.2.15-2 (arm64)
sbd/1.4.1-3 (s390x)
threadweaver/5.68.0-0ubuntu1 (armhf)

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/focal/update_excuses.html#glibc

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

Thank you!

[Brian Murray (brian-murray)]

Hello Simon, or anyone else affected,

Accepted glibc into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/glibc/2.31-0ubuntu9.12 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-focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-focal. 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 (2.31-0ubuntu9.12) for focal have finished running.
The following regressions have been reported in tests triggered by the package:

aevol/5.0+ds-1build1 (arm64)
c-icap/1:0.5.3-3 (armhf)
cysignals/1.10.2+ds-4 (s390x)
dbus/1.12.16-2ubuntu2.3 (armhf)
docker.io/20.10.21-0ubuntu1~20.04.2 (amd64, arm64, ppc64el, s390x)
flatpak/1.6.5-0ubuntu0.4 (ppc64el)
kholidays/1:5.68.0-0ubuntu1 (armhf)
kplotting/5.68.0-0ubuntu1 (armhf)
libimage-sane-perl/5-1 (arm64)
libreoffice/1:6.4.7-0ubuntu0.20.04.8 (armhf)
libxml-libxslt-perl/1.99-1 (s390x)
libxml-quote-perl/1.02-4build2 (s390x)
linux-aws-5.15/5.15.0-1041.46~20.04.1 (arm64)
linux-gcp-5.15/5.15.0-1039.47~20.04.1 (arm64)
linux-lowlatency-hwe-5.15/5.15.0-79.88~20.04.1 (arm64)
mariadb-10.3/1:10.3.38-0ubuntu0.20.04.1 (armhf)
postgresql-12/12.15-0ubuntu0.20.04.1 (amd64)
r-bioc-delayedarray/0.12.2+dfsg-1 (armhf)
r-cran-curl/4.3+dfsg-1 (armhf)
systemd/245.4-4ubuntu3.22 (arm64)
threadweaver/5.68.0-0ubuntu1 (amd64)
utox/0.17.1-1 (arm64)

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/focal/update_excuses.html#glibc

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

Thank you!

[Simon Chopin (schopin)]

Verified in a fresh container:

root@focal-glibc:~# ./test_wcsncmp
root@focal-glibc:~# echo $?
0
root@focal-glibc:~# dpkg -l libc6
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-==============-================-============-=================================
ii libc6:amd64 2.31-0ubuntu9.12 amd64 GNU C Library: Shared libraries

[Łukasz Zemczak (sil2100)]

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.

[Launchpad Janitor (janitor)]

This bug was fixed in the package glibc - 2.31-0ubuntu9.12

---------------
glibc (2.31-0ubuntu9.12) focal; urgency=medium

  * Drop SVE memcpy implementation due to kernel-related performance
    regression

glibc (2.31-0ubuntu9.11) focal; urgency=medium

  * Drop memcmp arm64 SIMD optimization patch due to performance regression
    on Raspberry Pi 3+ and 4

glibc (2.31-0ubuntu9.10) focal; urgency=medium

  [ Andrei Gherzan ]
  * d/p/lp1910312: Backport upstream fix for SEM_STAT_ANY (LP: #1910312)

  [ Simon Chopin ]
  * d/p/lp1999551/*: backport mem{cmp,cpy} optimizations for arm64 (LP: #1999551)
  * d/p/lp2001932/*: fix segfault in AVX2 strncmp (LP: #2001932)
  * d/p/lp2001975/*: fix overflow in AVX2 wcsncmp (LP: #2001975)

 -- Simon Chopin <email address hidden> Wed, 26 Jul 2023 09:44:39 +0200