Attached debdiff seems to fix the bug (reproduced and tested in a local VM with the latest Mantic 6.5 kernel).
** Patch added: "spl-fix.debdiff" https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/2034510/+attachment/5697900/+files/spl-fix.debdiff -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to zfs-linux in Ubuntu. https://bugs.launchpad.net/bugs/2034510 Title: spl fails to unregister sysctl entries Status in zfs-linux package in Ubuntu: New Status in zfs-linux source package in Mantic: New Bug description: [Impact] On unload the spl module is not properly cleaning up the registered sysctl entries with kernel 6.5 in Mantic: 06:58 ubuntu@mantic$ sudo modprobe spl modprobe: ERROR: could not insert 'spl': Protocol driver not attached 06:58 ubuntu@mantic$ sudo dmesg | grep duplicate [ 152.587197] sysctl duplicate entry: /kernel/spl/kmem/slab_kvmem_total [Test case] Uninstall zfsutils-linux and try to `modprobe -r zfs; modprobe -r spl`, then `modprobe zfs` again and you should see the error (with a failure to load spl again). At this point it is possible to load spl again only after a reboot. [Fix] Properly cleanup all the registered sysctl entries when the spl module is unloaded. [Regression potential] We may experience regressions in systems that are using zfs with the 6.5 kernel. ProblemType: Bug DistroRelease: Ubuntu 23.10 Package: zfs-dkms 2.2.0~rc3-0ubuntu3 ProcVersionSignature: User Name 6.5.0-4.4-generic 6.5.0 Uname: Linux 6.5.0-4-generic x86_64 ApportVersion: 2.27.0-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: unknown CloudArchitecture: x86_64 CloudBuildName: server CloudID: nocloud CloudName: unknown CloudPlatform: nocloud CloudSerial: 20230823 CloudSubPlatform: config-disk (/dev/vdb) Date: Wed Sep 6 07:06:33 2023 PackageArchitecture: all ProcEnviron: LANG=C.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> SourcePackage: zfs-linux UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/2034510/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
