This bug was fixed in the package libseccomp - 2.5.1-1ubuntu1~16.04.1 --------------- libseccomp (2.5.1-1ubuntu1~16.04.1) xenial; urgency=medium
* Updated to new upstream 2.5.1 version for updated syscalls support (LP: #1891810) - Removed the following patches that are now included in the new version: + d/p/fix-aarch64-syscalls.patch + d/p/db-consolidate-some-of-the-code-which-adds-rules.patch + d/p/db-add-shadow-transactions.patch - Deleted the patch to add a local copy of architecture specific header files from linux-libc-dev/focal as this is not needed anymore + d/p/add-5.4-local-syscall-headers.patch - debian/control: Added gperf to Build-Depends as this is now required by upstream - debian/libseccomp2.symbols: Added new symbols * Add system call headers for powerpc required for backport to xenial - d/p/add-5.8-powerpc-syscall-headers.patch -- Alex Murray <alex.mur...@canonical.com> Mon, 01 Mar 2021 13:50:00 +1030 ** Changed in: libseccomp (Ubuntu Xenial) Status: Fix Committed => Fix Released -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1891810 Title: Backport 2.5.1 to fix missing openat2 syscall, causing problems for fuse-overlayfs in nspawn containers Status in libseccomp package in Ubuntu: Fix Released Status in systemd package in Ubuntu: Fix Released Status in libseccomp source package in Xenial: Fix Released Status in systemd source package in Xenial: Invalid Status in libseccomp source package in Bionic: Fix Released Status in systemd source package in Bionic: Fix Committed Status in libseccomp source package in Focal: Fix Released Status in systemd source package in Focal: Fix Released Status in libseccomp source package in Groovy: Fix Released Status in systemd source package in Groovy: Fix Released Status in libseccomp source package in Hirsute: Fix Released Status in systemd source package in Hirsute: Fix Released Bug description: [Impact] The version of libseccomp2 in X/B/F/G does not know about the openat2 syscall. As such applications that use libseccomp cannot specify a system-call filter against this system-call and so it cannot be mediated. [Test Plan] This can be tested by simply running scmp_sys_resolver from the seccomp binary package and specifying this system-call: Existing behaviour: $ scmp_sys_resolver openat2 -1 Expected behaviour: $ scmp_sys_resolver openat2 437 (Note this value will be different on other architectures) [Where problems could occur] In version 2.5.1 of libseccomp which adds this new system-call, changes were also made in the way the socket system-call is handled by libseccomp on PPC platforms - this resulted in a change in the expected behaviour and so this has already been noticed and a fix is required for the systemd unit tests as a result https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1918696 There was also a similar change for s390x but so far no regressions have been observed as a result as systemd already expected that behaviour from libseccomp, it was only PPC that was missing. In the event that a regression is observed however, we can easily either patch the affected package to cope with the new behaviour of this updated libseccomp since in each case the change in behaviour only affects a few system calls on particular architectures, or we can revert this update. [Other Info] * As usual thorough testing of this update has been performed both manually via the QA Regression Testing scripts, and via the autopkgtest infrastructure against packages in the Ubuntu Security Proposed PPA https://launchpad.net/~ubuntu-security- proposed/+archive/ubuntu/ppa/ with results seen https://people.canonical.com/~platform/security-britney/current/ I have attached debdiffs of the prepared updates which are also sitting in the Ubuntu Security Proposed PPA. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libseccomp/+bug/1891810/+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