** Tags added: upgrade-software-version ** Changed in: libseccomp (Ubuntu) Importance: Undecided => Medium
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to libseccomp in Ubuntu. https://bugs.launchpad.net/bugs/1876055 Title: SRU: Backport 2.4.3-1ubuntu2 from groovy to focal/eoan/bionic/xenial for newer syscalls for core20 base Status in libseccomp package in Ubuntu: New Bug description: [Impact] snap-confine from snapd uses libseccomp to filter various system calls for confinement. The current version in eoan/bionic/xenial (2.4.1) is missing knowledge of various system calls for various architectures. As such this causes strange issues like python snaps segfaulting (https://github.com/snapcore/core20/issues/48) or the inadvertent denial of system calls which should be permitted by the base policy (https://forum.snapcraft.io/t/getrlimit-blocked-by-seccomp-on-focal- arm64/17237). libseccomp in groovy is using the latest upstream base release (2.4.3) plus it includes a patch to add some missing aarch64 system calls (https://bugs.launchpad.net/ubuntu/+source/libseccomp/+bug/1877633). SRUing this version back to older stable releases allows libseccomp to operate correctly on all supported architectures. [Test Case] libseccomp includes a significant unit test suite that is run during the build and as part of autopkgtests. To verify the new aarch64 system calls are resolved as expected the scmp_sys_resolver command can be used as well: $ scmp_sys_resolver -a aarch64 getrlimit 163 (whereas in the current version in focal this returns -10180 as libseccomp was not aware of this system-call at compile-time). As part of this SRU, the test suite in libseccomp has been patched to include a local copy of the architecture-specific kernel headers from the 5.4 kernel in focal *for all releases*, so that all system calls which are defined for the 5.4 kernel are known about *for the libseccomp test suite*. This allows all unit tests to pass on older releases as well and defaults the build to fail on unit test failures (whereas currently in xenial this has been overridden to ignore failures). [Regression Potential] This has a low regression potential due to significant testing with many packages that depend on libseccomp (lxc, qemu, snapd, apt, man etc) and none have shown any regression using this new version. Any possible regressions may include applications now seeing correct system call resolution whereas previously this would have failed, and so perhaps previous failures (which were erroneous) will now be permitted. However, this was always permitted previously by the policy anyway but just denied due to this bug so it is not a true regression as such. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libseccomp/+bug/1876055/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
