Tested on bionic-proposed using the test binary that can be obtained in the old description and it worked as expected:
root@ubuntu:~# gcc ./readlink-ns.c && sudo apparmor_parser -r ./readlink-ns.apparmor && sudo aa-exec -p test -- ./a.out -p 1 -n pid path: /proc/1/ns/pid rpath: pid:[4026531836] root@ubuntu:~# uname -a Linux ubuntu 4.15.0-156-generic #163-Ubuntu SMP Thu Aug 19 23:31:58 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux ** Tags removed: verification-needed-bionic ** Tags added: verification-done-bionic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890848 Title: 'ptrace trace' needed to readlink() /proc/*/ns/* files on older kernels To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1890848/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
