** Description changed: [Impact] Logging in as a sudo user in a Ubuntu Focal Linux container displays a warning: - sudo: setrlimit(RLIMIT_CORE): Operation not permitted + sudo: setrlimit(RLIMIT_CORE): Operation not permitted The warning is entirely unnecessary - the container is trying to adjust RLIMIT_CORE, but this isn't allowed inside a container anyway. While this is "just" a warning, logging into a container as sudo is a very common practice, so this warning risks creating confusion for LTS users. [Test Case] $ lxc launch ubuntu:20.04/amd64 sudo-sru-lp1857036-test $ lxc shell sudo-sru-lp1857036-test # sudo --login --user ubuntu sudo: setrlimit(RLIMIT_CORE): Operation not permitted To run a command as administrator (user "root"), use "sudo <command>". See "man sudo_root" for details. $ logout Install the PPA # apt-add-repository -yus ppa:bryce/sudo-sru-lp1857036-setrlimit-in-lxc # apt-get install sudo # sudo --login --user ubuntu - To run a command as administrator (user "root"), use "sudo <command>". - See "man sudo_root" for details. $ [Regression Potential] As this only affects printing of a couple warnings, the only behavioral change is in stderr output. [Discussion] This changes a couple warnings into equivalent debug printfs, which brings the sudo behavior in-line with the behavior in groovy, bionic, etc. and should cause no troubles. This patch originates from upstream, and is already in groovy's sudo package (which thus can be seen not to exhibit the issue). The upstream patch includes some new debug prints which should be harmless but are unnecessary to the fix so they've been removed. - [Original Report] When using `sudo --login --user USERNAME` with Ubuntu Focal currently, it will correctly operate but it will also throw the following error before continuing with the logon process (which completes successfully except for the stated error): sudo: setrlimit(RLIMIT_CORE): Operation not permitted A full run of this was tested in a Focal LXD container after dropping to a root shell to reproduce (arstotzka is the host system, focal-test is the test container): teward@arstotzka:~$ lxc shell focal-test root@focal-test:~# sudo --login --user ubuntu sudo: setrlimit(RLIMIT_CORE): Operation not permitted To run a command as administrator (user "root"), use "sudo <command>". See "man sudo_root" for details. ubuntu@focal-test:~$ This appears to be similar to this issue identified on RedHat's tracker: https://bugzilla.redhat.com/show_bug.cgi?id=1773148 ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: sudo 1.8.29-1ubuntu1 ProcVersionSignature: Ubuntu 4.15.0-72.81-generic 4.15.18 Uname: Linux 4.15.0-72-generic x86_64 ApportVersion: 2.20.11-0ubuntu14 Architecture: amd64 Date: Thu Dec 19 17:16:31 2019 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) LANG=C.UTF-8 SHELL=/bin/bash SourcePackage: sudo UpgradeStatus: No upgrade log present (probably fresh install) VisudoCheck: /etc/sudoers: parsed OK /etc/sudoers.d/90-cloud-init-users: parsed OK /etc/sudoers.d/README: parsed OK
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1857036 Title: `sudo --login --user USERNAME` throws `setrlimit(RLIMIT_CORE): Operation not permitted` error when run inside a container. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sudo/+bug/1857036/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
