[Bug 1877633] Re: libseccomp 2.4.3 (and 2.4.2) is not correctly resolving (at least) the getrlimit syscall on arm64

[Alex Murray]

I am not sure how packages.ubuntu.com generates its list but they were
published for all architectures on launchpad:
https://launchpad.net/ubuntu/+source/libseccomp/2.4.3-1ubuntu3.20.04.2

Also the debs are present on ports.ubuntu.com: http://ports.ubuntu.com
/ubuntu-ports/pool/main/libs/libseccomp/libseccomp-
dev_2.4.3-1ubuntu3.20.04.2_armhf.deb and listed in the focal-security
Packages.gz as expected.

So I suspect this is some artefact of packages.ubuntu.com perhaps only
taking into account the contents of the security / updates pocket on
amd64/i386 - but again I am not certain. However as far as apt is
concerned, these packages exist and should be installed automatically by
unattended-upgrades etc.

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https://bugs.launchpad.net/bugs/1877633

Title:
  libseccomp 2.4.3 (and 2.4.2) is not correctly resolving (at least) the
  getrlimit syscall on arm64

Status in libseccomp package in Ubuntu:
  Fix Released
Status in libseccomp source package in Focal:
  Fix Released
Status in libseccomp source package in Groovy:
  Fix Released

Bug description:
  This was reported via the snapcraft forum[1]:

  On bionic amd64, libseccomp 2.4.1-0ubuntu0.18.04.2

  $ lsb_release -d
  Description:	Ubuntu 18.04.4 LTS
  $ scmp_sys_resolver -a aarch64 163
  getrlimit
  $ scmp_sys_resolver -a aarch64 getrlimit
  163

  focal amd64, libseccomp 2.4.3-1ubuntu1 -- *__BROKEN__*

  $ lsb_release -d
  Description:	Ubuntu 20.04 LTS
  $ scmp_sys_resolver -a aarch64 163
  UNKNOWN
  $ scmp_sys_resolver -a aarch64 getrlimit
  -10180

  [1]https://forum.snapcraft.io/t/getrlimit-blocked-by-seccomp-on-focal-
  arm64/17237/8

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