** Description changed:

+ [ Impact ]
+ 
  There is a consistent autopkgtest failure in s390x only, where the
  logcheck test fails because there is an unexpected boot notice in the
  output[1]:
  
  136s ** Running logcheck
  136s This email is sent by logcheck. If you no longer wish to receive
  136s such mail, you can either uninstall the logcheck package or modify
  136s its configuration file (/etc/logcheck/logcheck.conf).
- 136s 
+ 136s
  136s System Events
  136s =-=-=-=-=-=-=
  136s -- Boot f50e9bf0cfe04fdbb0e7815e3d03ce39 --
- 136s 
+ 136s
  136s * FAIL: unmatched lines - logcheck rules may need updating
  136s This email is sent by logcheck. If you no longer wish to receive
  136s such mail, you can either uninstall the logcheck package or modify
  136s its configuration file (/etc/logcheck/logcheck.conf).
- 136s 
+ 136s
  136s System Events
  136s =-=-=-=-=-=-=
  136s -- Boot f50e9bf0cfe04fdbb0e7815e3d03ce39 --
- 136s 
+ 136s
  137s autopkgtest [19:22:39]: test logcheck: -----------------------]
  137s logcheck             FAIL stderr: * FAIL: unmatched lines - logcheck 
rules may need updating
  
+ At some point I thought it was related to the new apparmor rules that
+ now allow reading some systemd files, but the test last worked, and
+ started failing, with the same rsyslog version, so nothing changed in
+ rsyslog itself. A migration-reference/0 would also fail, and then this
+ failure would not block migration/release. But that also means the
+ other, valuable, working, and important, tests would not be looked at.
  
- At some point I thought it was related to the new apparmor rules that now 
allow reading some systemd files, but the test last worked, and started 
failing, with the same rsyslog version, so nothing changed in rsyslog itself.
+ On its own, this does not warrant an SRU, but it's being bundled
+ together with other fixes.
+ 
+ [ Test Plan ]
+ 
+ Since this is an autopkgtest fix, the test plan is that all autopkgtests
+ must pass on all architectures, with no bad-test hint or migration-
+ reference/0 help.
+ 
+ [ Where problems could occur ]
+ 
+  The fix is restricting the log lines that logcheck will analyze.
+ Specifically, it's restricting them to the current system boot. If there
+ were errors logged before the boot, logcheck will not see them. Note,
+ however, that logcheck is already being fed just rsyslog messages from a
+ particular timestamp that is AFTER the testbed rebooted (notice the
+ journalctl filtering), so it's already a subset of all messages.
  
  
+ [ Other Info ]
+ 
+ This was only seen on s390x, and the root cause was not found.
+ 
+ 
+ [ Original Description ]
+ 
+ There is a consistent autopkgtest failure in s390x only, where the
+ logcheck test fails because there is an unexpected boot notice in the
+ output[1]:
+ 
+ 136s ** Running logcheck
+ 136s This email is sent by logcheck. If you no longer wish to receive
+ 136s such mail, you can either uninstall the logcheck package or modify
+ 136s its configuration file (/etc/logcheck/logcheck.conf).
+ 136s
+ 136s System Events
+ 136s =-=-=-=-=-=-=
+ 136s -- Boot f50e9bf0cfe04fdbb0e7815e3d03ce39 --
+ 136s
+ 136s * FAIL: unmatched lines - logcheck rules may need updating
+ 136s This email is sent by logcheck. If you no longer wish to receive
+ 136s such mail, you can either uninstall the logcheck package or modify
+ 136s its configuration file (/etc/logcheck/logcheck.conf).
+ 136s
+ 136s System Events
+ 136s =-=-=-=-=-=-=
+ 136s -- Boot f50e9bf0cfe04fdbb0e7815e3d03ce39 --
+ 136s
+ 137s autopkgtest [19:22:39]: test logcheck: -----------------------]
+ 137s logcheck             FAIL stderr: * FAIL: unmatched lines - logcheck 
rules may need updating
+ 
+ At some point I thought it was related to the new apparmor rules that
+ now allow reading some systemd files, but the test last worked, and
+ started failing, with the same rsyslog version, so nothing changed in
+ rsyslog itself.
+ 
  Last pass:
- 8.2412.0-2ubuntu1     postgresql-common/274           2025-02-22 22:37:20 UTC 
0h 28m 43s      -       pass    da643947-4f61-4567-97ff-930a77206d06    log   
artifacts         
- 
+ 8.2412.0-2ubuntu1     postgresql-common/274           2025-02-22 22:37:20 UTC 
0h 28m 43s      -       pass    da643947-4f61-4567-97ff-930a77206d06    log   
artifacts
  
  First failure after that:
  8.2412.0-2ubuntu1     systemd/257.3-1ubuntu2 glibc/2.41-1ubuntu1 
php-twig/3.20.0-2 samba/2:4.21.4+dfsg-1ubuntu1 symfony/6.4.18+dfsg-1ubuntu1 
tinysparql/3.8.2-3               2025-02-24 19:30:36 UTC 0h 10m 13s      -      
 fail    74381588-1934-40f9-b06a-831634f68bdb    log   artifacts
  
- 
  It also fails with other triggers, simpler ones:
- 8.2412.0-2ubuntu1     krb5/1.21.3-4ubuntu2            2025-02-26 03:56:06 UTC 
0h 12m 30s      -       fail    90d5a082-37fe-4859-8044-4973c5d68202    log   
artifacts 
- 
+ 8.2412.0-2ubuntu1     krb5/1.21.3-4ubuntu2            2025-02-26 03:56:06 UTC 
0h 12m 30s      -       fail    90d5a082-37fe-4859-8044-4973c5d68202    log   
artifacts
  
  And a migration-reference/0 run from a few days before also failed, with the 
same error:
- 8.2412.0-2ubuntu1     migration-reference/0           2025-02-20 01:14:47 UTC 
0h 10m 33s      -       fail    d7415807-95c5-4bc6-8fb2-0a4c3dc1b3f6    log   
artifacts  
+ 8.2412.0-2ubuntu1     migration-reference/0           2025-02-20 01:14:47 UTC 
0h 10m 33s      -       fail    d7415807-95c5-4bc6-8fb2-0a4c3dc1b3f6    log   
artifacts
  
- 
- 1. 
https://autopkgtest.ubuntu.com/results/autopkgtest-plucky/plucky/s390x/r/rsyslog/20250224_193036_105c8@/log.gz
+ 1. https://autopkgtest.ubuntu.com/results/autopkgtest-
+ plucky/plucky/s390x/r/rsyslog/20250224_193036_105c8@/log.gz

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https://bugs.launchpad.net/bugs/2100765

Title:
  Consistent DEP8/s390x failure: boot notice unexpectedly in journalctl
  logs

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