[Bug 261543] [ZFS] file in encrypted dataset disappears after first reboot

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261543

            Bug ID: 261543
           Summary: [ZFS] file in encrypted dataset disappears after first
                    reboot
           Product: Base System
           Version: 13.0-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: taceant@gmail.com

A file in encrypted dataset disappears after first reboot.

How to reproduce:
1. Create an encrypted dataset like so (after creating a file with a
passphrase)
zfs create -o encryption=on -o keyformat=passphrase -o
keylocation=file:///root/pass zroot/enc
2. Create file in encrypted dataset, for example like so
cat > /zroot/enc/testfile
3. Reboot
4. Look for testfile, it has disappeared.


# freebsd-version
13.0-RELEASE-p6

I can reproduce this every time I try.

Further remarks:
- The issue does not manifest if the dataset is not encrypted. I have not
tested other types of encryption so don't know if it manifests or not.
- The issue happens only on the first reboot after creating the dataset. In
other words, if I create a file after the first reboot and reboot again, the
file does not disappear.
- The issue manifests also in a FreeBSD VirtualBox guest running on Archlinux
host.
- The issue does not manifests in a Xubuntu 21.10 VirtualBox guest running on
Archlinux  host. This suggests that the issue is in the FreeBSD kernel and not
in the part of the ZFS code that is shared with Linux.

-- 
You are receiving this mail because:
You are the assignee for the bug.