[Bug 1925216] Re: confusing but harmless warning messages printed about syscalls

[Brian Murray]

Hello Dan, or anyone else affected,

Accepted systemd into bionic-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/systemd/237-3ubuntu10.48 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-
bionic to verification-done-bionic. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-bionic. 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: systemd (Ubuntu Bionic)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-bionic

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https://bugs.launchpad.net/bugs/1925216

Title:
  confusing but harmless warning messages printed about syscalls

Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Bionic:
  Fix Committed

Bug description:
  [impact]

  systemd prints messages that complain about system calls such as:

  /lib/systemd/system/systemd-journald.service:33: Failed to parse
  system call, ignoring: pidfd_getfd

  [test case]

  boot bionic system with 4.15 kernel that does not support pidfd_getfd
  syscall

  [regression potential]

  any regression would prevent correct configuration of seccomp syscall
  filters, and/or failure to load/parse unit files that contain
  SystemCallFilter= directives

  [scope]

  this is needed only for b

  this is fixed upstream by commit
  13d92c6300edbb1369f97c2e1bef4c4096de8ddb which was included in v238,
  so this is fixed in focal and later

  this is not needed for x as seccomp handling is completely different
  in that older release

  [other info]

  as the warning states, the invalid system call is ignored, which is
  the correct action, and the patch to fix this just changes the log to
  debug instead of warning (along with consolidation of several flag
  params into a single flag enum). Thus, no actual change in behavior
  should occur (other than logging the messages as debug instead of
  warning).

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