Public bug reported: == Comment: #0 - Dominik Klein <[email protected]> - 2018-12-10 03:58:10 == There seems to be a bug in the efi-lockdown patch as applied on top of vanilla for Cosmic kernels: http://kernel.ubuntu.com/git/ubuntu/ubuntu-cosmic.git/commit/fs/debugfs/file.c?id=a1ba65da9ceae481c154bfd1a2c1550e4566d986
Also seems to be present for Disco as of today: http://kernel.ubuntu.com/git/ubuntu/ubuntu-disco.git/commit/fs/debugfs/file.c?id=a1ba65da9ceae481c154bfd1a2c1550e4566d986 The problem is that part of the patch modifies kernel behavior independently of CONFIG_LOCK_DOWN_KERNEL being set or not causing issues on two debugfs files on s390x. Vasily Gorbik has already analyzed the problem and has posted a proposed fix here: https://lkml.org/lkml/2018/11/21/634 https://lkml.org/lkml/2018/11/21/635 ** Affects: ubuntu-z-systems Importance: High Status: Triaged ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Skipper Bug Screeners (skipper-screen-team) Status: New ** Tags: architecture-s39064 bugnameltc-173993 severity-high targetmilestone-inin1810 ** Tags added: architecture-s39064 bugnameltc-173993 severity-high targetmilestone-inin--- ** Changed in: ubuntu Assignee: (unassigned) => Skipper Bug Screeners (skipper-screen-team) ** Package changed: ubuntu => kernel-package (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1807686 Title: efi-lockdown patch causes -EPERM for some debugfs files even though CONFIG_LOCK_DOWN_KERNEL is not set To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1807686/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
