Discussed with Frank, while it is not great, CSS >0 are rare. They are more likely
Decision was to add a release note entry as known issue, and drive the fix as SRU. The remaining gap is its usage on the install path, but mainframe users are even more LTS centric. Noble is unaffected, upgrades to it will be fine once SRU fixed and towards the next LTS it will be fine too. If we respin anyway we'd like to have it for sure. But this alone isn't a reason to do so. If nothing happens that makes this a asap-respin-images case I'd ask the security folks doing the original changes to follow up on driving the SRU aspect of this. But while I wsa trying to prep a fix I found that the discussion above was a red herring. This was not "CSS0 vs CSS>0 and the latter fails". This is blocking CSS0 ! See the denial: name="/sys/devices/css0/0.0.0000/0.0.0101/block/dasda/hidden" With that I'm going back to critical until I understand more ** Changed in: apparmor (Ubuntu) Importance: Medium => Critical -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apparmor in Ubuntu. https://bugs.launchpad.net/bugs/2107402 Title: lsblk on IBM z Systems blocked by apparmor in 25.04 Status in Ubuntu on IBM z Systems: Confirmed Status in apparmor package in Ubuntu: Confirmed Status in util-linux package in Ubuntu: Invalid Bug description: Fresh install of 25.04 on s390x. Same happens also on upgrade from 24.10 to 25.04 lsblk returns no output journactl shows it is blocked by apparmor This works fine for SCSI devices, it fails only for DASD. ``` 2025-04-15T15:02:26.048055+00:00 s5lp1-gen03 kernel: kauditd_printk_skb: 6 callbacks suppressed 2025-04-15T15:02:26.048075+00:00 s5lp1-gen03 kernel: audit: type=1400 audit(1744729346.034:270): apparmor="DENIED" operation="open" class="file" profile="lsblk" name="/sys/devices/css0/0.0.0000/0.0.0101/block/dasda/hidden" pid=2070 comm="lsblk" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 2025-04-15T15:02:26.048077+00:00 s5lp1-gen03 kernel: audit: type=1400 audit(1744729346.034:271): apparmor="DENIED" operation="open" class="file" profile="lsblk" name="/sys/devices/css0/0.0.0000/0.0.0101/block/dasda/dev" pid=2070 comm="lsblk" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 2025-04-15T15:02:26.048078+00:00 s5lp1-gen03 kernel: audit: type=1400 audit(1744729346.034:272): apparmor="DENIED" operation="open" class="file" profile="lsblk" name="/sys/devices/css0/0.0.0003/0.0.0104/block/dasdd/hidden" pid=2070 comm="lsblk" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 2025-04-15T15:02:26.048079+00:00 s5lp1-gen03 kernel: audit: type=1400 audit(1744729346.034:273): apparmor="DENIED" operation="open" class="file" profile="lsblk" name="/sys/devices/css0/0.0.0003/0.0.0104/block/dasdd/dev" pid=2070 comm="lsblk" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 2025-04-15T15:02:26.048080+00:00 s5lp1-gen03 kernel: audit: type=1400 audit(1744729346.034:274): apparmor="DENIED" operation="open" class="file" profile="lsblk" name="/sys/devices/css0/0.0.0001/0.0.0102/block/dasdb/hidden" pid=2070 comm="lsblk" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 2025-04-15T15:02:26.048080+00:00 s5lp1-gen03 kernel: audit: type=1400 audit(1744729346.034:275): apparmor="DENIED" operation="open" class="file" profile="lsblk" name="/sys/devices/css0/0.0.0001/0.0.0102/block/dasdb/dev" pid=2070 comm="lsblk" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 2025-04-15T15:02:26.048081+00:00 s5lp1-gen03 kernel: audit: type=1400 audit(1744729346.034:276): apparmor="DENIED" operation="open" class="file" profile="lsblk" name="/sys/devices/css0/0.0.0002/0.0.0103/block/dasdc/hidden" pid=2070 comm="lsblk" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 2025-04-15T15:02:26.048081+00:00 s5lp1-gen03 kernel: audit: type=1400 audit(1744729346.034:277): apparmor="DENIED" operation="open" class="file" profile="lsblk" name="/sys/devices/css0/0.0.0002/0.0.0103/block/dasdc/dev" pid=2070 comm="lsblk" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 ``` Attaching also strace To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/2107402/+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
