I currently can't reproduce the problem myself. I do recall that it was the order of mounting. I have a freshly created zpool where the pool was created with one password, and one of it's sub- ZFS-trees with a different one, wanted to mount it and make the mistake to enter a wrong password for the pool, thus unlocked the inner part only and mounted them in wrong order.
It was reproducable and crashed with a segfault every time I tried it until removing the directory stub, but have not yet been able to reproduce since I rebooted the machine. Still trying... -- 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/1901417 Title: zfs mount segmentation fault when target directory is non empty Status in zfs-linux package in Ubuntu: Incomplete Bug description: Hi, I just had made some mistake in a mounting order, thus producing non- empty target directory. Imagine a pool name pool1 and zfs filesystems pool1 and pool1/a which are (due to different encryption keys) to be mounted as /pool1/a one in another. (Because of encryption not automatically mounted) I made a simple mistake and mounted /pool1/a before /pool1, but noticed and unmounted /pool1/a before mounting /pool1, but forget to rmdir /pool1/a, so /pool1 was not empty when mounting /pool1. # zfs mount -a cannot mount '/pool1': directory is not empty zsh: segmentation fault (core dumped) zfs mount -a Segmentation faults should not happen. after rmdir /pool1/a (i.e. make the target empty), things work as normal. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: zfsutils-linux 0.8.3-1ubuntu12.4 ProcVersionSignature: Ubuntu 5.4.0-48.52-generic 5.4.60 Uname: Linux 5.4.0-48-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu27.10 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: LXQt Date: Sun Oct 25 15:28:45 2020 InstallationDate: Installed on 2018-04-30 (909 days ago) InstallationMedia: Lubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) SourcePackage: zfs-linux UpgradeStatus: Upgraded to focal on 2020-10-02 (23 days ago) modified.conffile..etc.sudoers.d.zfs: [inaccessible: [Errno 13] Keine Berechtigung: '/etc/sudoers.d/zfs'] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1901417/+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
