[Bug 1933516] Please test proposed package

[Robie Basak]

Hello Dan, or anyone else affected,

Accepted gzip into bionic-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/gzip/1.6-5ubuntu1.1 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.

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https://bugs.launchpad.net/bugs/1933516

Title:
  gzip: error while loading shared libraries: cannot restore segment
  prot after reloc: Operation not permitted

Status in gzip package in Ubuntu:
  Fix Released
Status in gzip source package in Bionic:
  Fix Committed
Status in gzip package in Debian:
  Fix Released

Bug description:
  [impact]

  gzip/libgzip fails for systemd services using
  MemoryDenyWriteExecute=yes

  [test case]

  note this only fails on ppc64el

  create service file /etc/systemd/system/test-localegen.service with
  content:

  [Service]
  MemoryDenyWriteExecute=yes
  ExecStart=/usr/sbin/locale-gen

  run systemctl daemon-reload, and start the service:

  ubuntu at test-ppc-b:~$ sudo systemctl daemon-reload
  ubuntu at test-ppc-b:~$ sudo systemctl start test-localegen.service
  ubuntu at test-ppc-b:~$ sudo systemctl status test-localegen.service
  ○ test-localegen.service
       Loaded: loaded (8;;file://test-ppc-b/etc/systemd/system/test-localegen.service^G/etc/systemd/system/test-localegen.service8;;^G; static)
       Active: inactive (dead)

  Jun 24 16:44:18 test-ppc-b locale-gen[2737]: gzip: error while loading shared libraries: cannot restore segment prot after reloc: Operation not permitted
  Jun 24 16:44:18 test-ppc-b locale-gen[2738]: gzip: error while loading shared libraries: cannot restore segment prot after reloc: Operation not permitted
  Jun 24 16:44:18 test-ppc-b locale-gen[2739]: gzip: error while loading shared libraries: cannot restore segment prot after reloc: Operation not permitted
  Jun 24 16:44:18 test-ppc-b locale-gen[2740]: gzip: error while loading shared libraries: cannot restore segment prot after reloc: Operation not permitted
  Jun 24 16:44:18 test-ppc-b locale-gen[2741]: gzip: error while loading shared libraries: cannot restore segment prot after reloc: Operation not permitted
  Jun 24 16:44:18 test-ppc-b locale-gen[2506]: failed to set locale!
  Jun 24 16:44:18 test-ppc-b locale-gen[2506]: [error] default character map file `ANSI_X3.4-1968' not found: No such file or directory
  Jun 24 16:44:18 test-ppc-b locale-gen[2489]:  done
  Jun 24 16:44:18 test-ppc-b locale-gen[2483]: Generation complete.
  Jun 24 16:44:18 test-ppc-b systemd[1]: test-localegen.service: Deactivated successfully.

  [regression potential]

  as this sets NO_ASM any regression would likely involve changed
  performance or architecture-specific failures

  [racb] As NO_ASM switches code implementations inside gzip, it's
  possible that this regresses behaviour if a bug exists in the C
  implementation but not in the assembly implementation. However in
  mitigation the C implementation has been in use since Focal, and it
  doesn't look like anything relevant to this change has been changed
  since Bionic.

  [scope]

  this is needed only in b

  this was fixed in debian at version 1.9-2.1, so this is fixed already
  in f and later

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