[Bug 1999275] Please test proposed package
Łukasz Zemczak
1999275 at bugs.launchpad.net
Thu Aug 24 18:10:11 UTC 2023
Hello Nick, or anyone else affected,
Accepted systemd into jammy-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/systemd/249.11-0ubuntu3.10 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-
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.
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https://bugs.launchpad.net/bugs/1999275
Title:
systemd-binfmt.service fails in tests-in-lxd
Status in systemd package in Ubuntu:
Fix Released
Status in systemd source package in Jammy:
Fix Committed
Bug description:
[Impact]
systemd-binfmt.service fails in LXD because access
/proc/sys/binfmt_misc is prevented by LXD apparmor config. This causes
our autopkgtest to fail, and leaves systemd-binfmt.service in a failed
state:
root at jammy:~# systemctl status systemd-binfmt
× systemd-binfmt.service - Set Up Additional Binary Formats
Loaded: loaded (/lib/systemd/system/systemd-binfmt.service; static)
Active: failed (Result: exit-code) since Thu 2023-08-17 18:54:18 UTC; 1min 12s ago
Docs: man:systemd-binfmt.service(8)
man:binfmt.d(5)
https://www.kernel.org/doc/html/latest/admin-guide/binfmt-misc.html
https://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
Main PID: 118 (code=exited, status=1/FAILURE)
CPU: 5ms
Aug 17 18:54:18 jammy systemd[1]: Starting Set Up Additional Binary Formats...
Aug 17 18:54:18 jammy systemd-binfmt[118]: Failed to add binary format: Permission denied
Aug 17 18:54:18 jammy systemd[1]: systemd-binfmt.service: Main process exited, code=exited, status=1/FAILURE
Aug 17 18:54:18 jammy systemd[1]: systemd-binfmt.service: Failed with result 'exit-code'.
Aug 17 18:54:18 jammy systemd[1]: Failed to start Set Up Additional Binary Formats.
[Test Plan]
1. test_no_failed from boot-and-services should pass.
2. Manual test:
* Start a Jammy LXD container:
$ lxc launch ubuntu-daily:jammy jammy
$ lxc exec jammy bash
* In the container, check systemd-binfmt.service:
root at jammy:~# systemctl status systemd-binfmt
● systemd-binfmt.service - Set Up Additional Binary Formats
Loaded: loaded (/lib/systemd/system/systemd-binfmt.service; static)
Drop-In: /etc/systemd/system/systemd-binfmt.service.d
└─override.conf
Active: active (exited) since Thu 2023-08-17 19:01:00 UTC; 2min 27s ago
Docs: man:systemd-binfmt.service(8)
man:binfmt.d(5)
https://www.kernel.org/doc/html/latest/admin-guide/binfmt-misc.html
https://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
Main PID: 122 (code=exited, status=0/SUCCESS)
CPU: 5ms
Aug 17 19:01:00 jammy systemd[1]: Starting Set Up Additional Binary Formats...
Aug 17 19:01:00 jammy systemd[1]: Finished Set Up Additional Binary Formats.
root at jammy:~# journalctl -t systemd-binfmt -b
Aug 17 19:01:00 jammy systemd-binfmt[122]: /proc/sys/fs/binfmt_misc is not mounted in read-write mode, skipping.
[ Where problems could occur]
The patches are contained to binfmt logic in systemd, and so any
regressions would be within systemd-binfmt itself. The patches make it
so that systemd-binfmt checks if /proc/sys/binfmt_misc is mounted as
rw before trying to make any changes. If it is mounted, but read-only,
then systemd-binfmt will exit cleanly and log a message indicating so.
If the patch was incorrect, it could make it so that systemd-binfmt is
not fully executed on systems where it should be.
[Original Description]
The systemd-binfmt.service requires read-write access to
/proc/sys/fs/binfmt_misc, but this is not possible in unprivileged LXD
containers without binfmt_misc namespace support in the kernel [1].
When this service is triggered, we get the following failure from
test_no_failed within tests-in-lxd:
No failed units ... -------- journal for failed service systemd-binfmt.service -----------
Dec 08 10:43:37 autopkgtest-lxd-qicaxl systemd[1]: Starting Set Up Additional Binary Formats...
Dec 08 10:43:37 autopkgtest-lxd-qicaxl systemd-binfmt[99]: Failed to flush binfmt_misc rules, ignoring: Permission denied
Dec 08 10:43:37 autopkgtest-lxd-qicaxl systemd-binfmt[99]: /usr/lib/binfmt.d/python3.10.conf:1: Failed to delete rule 'python3.10', ignoring: Permission denied
Dec 08 10:43:37 autopkgtest-lxd-qicaxl systemd-binfmt[99]: /usr/lib/binfmt.d/python3.10.conf:1: Failed to add binary format 'python3.10': Permission denied
Dec 08 10:43:37 autopkgtest-lxd-qicaxl systemd[1]: systemd-binfmt.service: Main process exited, code=exited, status=1/FAILURE
Dec 08 10:43:37 autopkgtest-lxd-qicaxl systemd[1]: systemd-binfmt.service: Failed with result 'exit-code'.
Dec 08 10:43:37 autopkgtest-lxd-qicaxl systemd[1]: Failed to start Set Up Additional Binary Formats.
FAIL
test_rsyslog (__main__.ServicesTest) ... ok
test_tmp_cleanup (__main__.ServicesTest) ... ok
test_tmp_mount (__main__.ServicesTest) ... ok
test_udev (__main__.ServicesTest) ... skipped 'udev does not work in containers'
======================================================================
FAIL: test_no_failed (__main__.ServicesTest)
No failed units
----------------------------------------------------------------------
Traceback (most recent call last):
File "/tmp/autopkgtest.METFVA/build.LjB/real-tree/debian/tests/boot-and-services", line 74, in test_no_failed
self.assertEqual(failed, [])
AssertionError: Lists differ: ['systemd-binfmt.service loaded failed failed Set Up Additional Binary Formats'] != []
First list contains 1 additional elements.
First extra element 0:
'systemd-binfmt.service loaded failed failed Set Up Additional Binary Formats'
- ['systemd-binfmt.service loaded failed failed Set Up Additional Binary Formats']
+ []
The systemd-binfmt.service is only started if there is a configuration
to be loaded from one of the valid configuration directories (e.g.
/usr/lib/binfmt.d/python3.10.conf). Previously, no such file was
installed in the test LXD images, but a recent upload of python3.10
added support for systemd-binfmt [2].
[1] https://discuss.linuxcontainers.org/t/3-1-0-binfmt-support-service-in-unprivileged-guest-requires-write-access-on-hosts-proc-sys-fs-binfmt-misc/5249
[2] https://launchpadlibrarian.net/632281245/python3.10_3.10.8-1_3.10.8-3.diff.gz
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